Model launches / Anthropic

Claude Opus 5.5

Scores at a glance

119 benchmarks · large dot: Claude Opus 5.5; small dots: closest models where reported

Artificial Analysis Intelligence Index v5.0 ↗58.41 index

Claude Opus 5.5 (Max, Default Fallback) · Intelligence Index v5.0 ↗

2 more reported results

57.62 index · Claude Opus 5.5 (Max, Default Fallback) · Intelligence Index v4.3.2 · Artificial Analysis ↗

58 · Claude Opus 5.5 (max) · AA Index · Meta report snapshot · Muse Wonder official evaluation report ↗

AA-Briefcase v1.1 ↗1799.65 Elo

Claude Opus 5.5 (Max, Default Fallback) · AA-Briefcase v1.1 · overall Elo ↗

1 more reported result

1803 Elo · Claude Opus 5.5 (max, with fallback) · AA-Briefcase v1.1 · AA-Briefcase v1.1 (Elo-score) · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

AutomationBench-AA ↗69.54%

Claude Opus 5.5 (Max, Default Fallback) · AutomationBench-AA · guardrail-gated objective score ↗

2 more reported results

41.2 · Claude Opus 5.5 (max) · AutomationBench-AA · Muse Wonder official evaluation report ↗

69.5% · Claude Opus 5.5 (max, with fallback) · AutomationBench-AA · Automation Bench-AA · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

GDP.pdf ↗26.20%

Claude Opus 5.5 (Max, Default Fallback) · GDP.pdf · all-pass ↗

4 more reported results

30.6 · Claude Opus 5.5 (max) · GDP.pdf · Muse Wonder official evaluation report ↗

30.6% · Claude Opus 5.5 (max) · GDP.pdf · GDP.pdf score · % · Epoch AI · GDP.pdf ↗

83.9% · Claude Opus 5.5 (max, with fallback) · GDP.pdf · GDP.pdf w/ python · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

30.6% · Claude Opus 5.5 (max, with fallback) · GDP.pdf · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

Terminal-Bench 4.0 ↗59.60%

Claude Opus 5.5 (Max, Default Fallback) · Terminal-Bench 4.0 · AA harness ↗

5 more reported results

65.15 % · Claude Opus 5.5 (Mini-SWE-agent) · Terminal-Bench 4.0 · Score · Vals AI · Terminal-Bench 4.0 ↗

66.4% · Opus 5.5 · Terminal-Bench 4.0 · Claude Opus 5.5 launch report ↗

66.4% · Claude Opus 5.5 · Terminal-Bench 4.0 · Gemini 4 Argon model card ↗

59.6 · Claude Opus 5.5 (max) · Terminal-Bench 4.0-AA · Muse Wonder official evaluation report ↗

66.4% · Claude Opus 5.5 (max, with fallback) · Terminal-Bench 4.0 · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

Terminal-Bench-Science 0.1 ↗59.05%

Claude Opus 5.5 (Max, Default Fallback) · Terminal-Bench-Science 0.1 · AA harness ↗

4 more reported results

47.14 % · Claude Opus 5.5 (Mini-SWE-agent) · Terminal-Bench-Science · Score · Vals AI · Terminal-Bench-Science ↗

58.7% · Opus 5.5 · Terminal-Bench-Science 0.1 · Claude Opus 5.5 launch report ↗

63.3% · Claude Opus 5.5 · Terminal-Bench Science 0.1 · Gemini 4 Argon model card ↗

63.3% · Claude Opus 5.5 (max, with fallback) · Terminal-Bench-Science 0.1 · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

FrontierCode 2.0 ↗46.44%

Claude Opus 5.5 (Max, Default Fallback) · FrontierCode 2.0 · AA implementation ↗

CritPt v2 · hard subset ↗61.00%

Claude Opus 5.5 (Max, Default Fallback) · CritPt v2 · hard subset · AA implementation ↗

HLE-Diamond ↗67.90%

Claude Opus 5.5 (Max, Default Fallback) · HLE-Diamond · AA implementation ↗

2 more reported results

55.00% · claude-opus-5-5 · Scale Labs · Score · Scale Labs / SEAL · Scale Labs ↗

60.9% · Claude Opus 5.5 (max, with fallback) · HLE-Diamond · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

AA-Omniscience v1.1 ↗48.13 index

Claude Opus 5.5 (Max, Default Fallback) · AA-Omniscience v1.1 · error-penalized index ↗

1 more reported result

46.42 index · Claude Opus 5.5 (Max, Default Fallback) · AA-Omniscience · error-penalized score · Artificial Analysis ↗

AA-Omniscience v1.1 · accuracy ↗65.50%

Claude Opus 5.5 (Max, Default Fallback) · AA-Omniscience v1.1 · accuracy ↗

1 more reported result

66.22% · Claude Opus 5.5 (Max, Default Fallback) · AA-Omniscience · accuracy · Artificial Analysis ↗

AA-Omniscience v1.1 · hallucination rate ↗50.34%

Claude Opus 5.5 (Max, Default Fallback) · AA-Omniscience v1.1 · hallucination rate, lower is better ↗

1 more reported result

58.61% · Claude Opus 5.5 (Max, Default Fallback) · AA-Omniscience · hallucination rate, lower is better · Artificial Analysis ↗

GDPval-AA v2.1 ↗1866.27 Elo

Claude Opus 5.5 (Max, Default Fallback) · GDPval-AA v2.1 · Elo ↗

2 more reported results

1846 · Opus 5.5 · GDPval-AA v2.1 (Elo) · Claude Opus 5.5 launch report ↗

1866 Elo · Claude Opus 5.5 (max, with fallback) · GDPval-AA v2.1 · GDPval-AA v2.1 (Elo-score) · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

AA-3D ↗1196.40 Elo

Claude Opus 5.5 (Max, Default Fallback) · AA-3D · Elo ↗

AA-AnalystAgent ↗56.25%

Claude Opus 5.5 (Max, Default Fallback) · AA-AnalystAgent · strict score ↗

Harvey LAB-AA v1.1 ↗4.17%

Claude Opus 5.5 (Max, Default Fallback) · Harvey LAB-AA v1.1 · all-pass ↗

1 more reported result

4.2 · Claude Opus 5.5 (max) · Harvey LAB-AA · Muse Wonder official evaluation report ↗

FrontierCode 1.1 ↗52.17%

Claude Opus 5.5 (Max, Default Fallback) · FrontierCode 1.1 · AA implementation ↗

2 more reported results

54.4% · Opus 5.5 · FrontierCode 1.1 Main · Claude Opus 5.5 launch report ↗

54.64% · Claude Opus 5.5 (medium) · FrontierCode · Main score · % · Epoch AI · FrontierCode ↗

AA-LCR v1.1 ↗84.67%

Claude Opus 5.5 (Max, Default Fallback) · AA-LCR v1.1 ↗

SciCode ↗66.90%

Claude Opus 5.5 (Max, Default Fallback) · SciCode · AA implementation ↗

5 more reported results

66.9% · Claude Opus 5.5 (max) · SciCode · Score · % · Epoch AI · SciCode ↗

65.05% · Claude Opus 5.5 (xhigh) · SciCode · Score · % · Epoch AI · SciCode ↗

60.42% · Claude Opus 5.5 (high) · SciCode · Score · % · Epoch AI · SciCode ↗

59.26% · Claude Opus 5.5 (medium) · SciCode · Score · % · Epoch AI · SciCode ↗

58.56% · Claude Opus 5.5 (low) · SciCode · Score · % · Epoch AI · SciCode ↗

Humanity’s Last Exam ↗61.35%

Claude Opus 5.5 (Max, Default Fallback) · Humanity’s Last Exam · AA implementation ↗

3 more reported results

67.7% · tools · Opus 5.5 · Humanity’s Last Exam · tools · Claude Opus 5.5 launch report ↗

67.7% · Claude Opus 5.5 (max, with fallback) · Humanity’s Last Exam · HLE-Full w/ tools · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

59.8% · Claude Opus 5.5 (max, with fallback) · Humanity’s Last Exam · HLE-Full · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

ITBench-AA ↗38.23%

Claude Opus 5.5 (Max, Default Fallback) · ITBench-AA · root-cause score ↗

MMMU-Pro ↗87.69%

Claude Opus 5.5 (Max, Default Fallback) · MMMU-Pro · AA implementation ↗

2 more reported results

89.8% · Claude Opus 5.5 (max, with fallback) · MMMU-Pro · MMMU-Pro w/ python · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

87.7% · Claude Opus 5.5 (max, with fallback) · MMMU-Pro · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

MLCR-AA ↗27.78%

Claude Opus 5.5 (Max, Default Fallback) · MLCR-AA · overall ↗

HealthBench ↗59.88%

Claude Opus 5.5 (Max, Default Fallback) · HealthBench · HealthBench Professional · length-adjusted ↗

1 more reported result

65.6 · Claude Opus 5.5 (max) · HealthBench · HealthBench Professional · length-adjusted · Muse Wonder official evaluation report ↗

CritPt v2 ↗77.71%

Claude Opus 5.5 (Max, Default Fallback) · CritPt v2 · code tools ↗

CritPt ↗31.71%

Claude Opus 5.5 (Max, Default Fallback) · CritPt · original ↗

5 more reported results

31.71% · Claude Opus 5.5 (max) · CritPt · Accuracy · % · Epoch AI · CritPt ↗

31.71% · Claude Opus 5.5 (xhigh) · CritPt · Accuracy · % · Epoch AI · CritPt ↗

30.86% · Claude Opus 5.5 (high) · CritPt · Accuracy · % · Epoch AI · CritPt ↗

27.71% · Claude Opus 5.5 (medium) · CritPt · Accuracy · % · Epoch AI · CritPt ↗

17.71% · Claude Opus 5.5 (low) · CritPt · Accuracy · % · Epoch AI · CritPt ↗

AA-PersonalityBench ↗89.85 percentile

Claude Opus 5.5 (Max, Default Fallback) · AA-PersonalityBench · expressiveness ↗

7 more reported results

77.15 percentile · Claude Opus 5.5 (Max, Default Fallback) · AA-PersonalityBench · organization · Artificial Analysis ↗

92.38 percentile · Claude Opus 5.5 (Max, Default Fallback) · AA-PersonalityBench · informativeness · Artificial Analysis ↗

89.85 percentile · Claude Opus 5.5 (Max, Default Fallback) · AA-PersonalityBench · transparency · Artificial Analysis ↗

82.23 percentile · Claude Opus 5.5 (Max, Default Fallback) · AA-PersonalityBench · warmth · Artificial Analysis ↗

69.54 percentile · Claude Opus 5.5 (Max, Default Fallback) · AA-PersonalityBench · conviction · Artificial Analysis ↗

94.92 percentile · Claude Opus 5.5 (Max, Default Fallback) · AA-PersonalityBench · imagination · Artificial Analysis ↗

18.77 percentile · Claude Opus 5.5 (Max, Default Fallback) · AA-PersonalityBench · slop · Artificial Analysis ↗

CursorBench 4.0 ↗57.8%

Opus 5.5 · CursorBench 4.0 ↗

5 more reported results

57.8% · Claude Opus 5.5 (max) · CursorBench · Score · % · Epoch AI · CursorBench ↗

56% · Claude Opus 5.5 (xhigh) · CursorBench · Score · % · Epoch AI · CursorBench ↗

56% · Claude Opus 5.5 (high) · CursorBench · Score · % · Epoch AI · CursorBench ↗

52.5% · Claude Opus 5.5 (medium) · CursorBench · Score · % · Epoch AI · CursorBench ↗

43.7% · Claude Opus 5.5 (low) · CursorBench · Score · % · Epoch AI · CursorBench ↗

AutomationBench · Zapier ↗40.0%

Opus 5.5 · AutomationBench ↗

1 more reported result

42.5% · Claude Opus 5.5 · AutomationBench · Gemini 4 Argon model card ↗

OSWorld 2.1 ↗81.8% · partial

Opus 5.5 · OSWorld 2.1 · partial ↗

2 more reported results

81.8% partial / — binary · Claude Opus 5.5 (max) · OSWorld 2.1 · partial and binary · Muse Wonder official evaluation report ↗

81.8% · Claude Opus 5.5 (max, with fallback) · OSWorld 2.1 · OSWorld V2.1 · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

Chartography ↗89.0% · tools

Opus 5.5 · Chartography · tools ↗

2 more reported results

66.3% · Claude Opus 5.5 · Chartography · no tools · Gemini 4 Argon model card ↗

89% · Claude Opus 5.5 (max, with fallback) · Chartography · ChartoGraphy w/ python · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

Vals Index ↗70.18 %

Claude Opus 5.5 · Vals Index · Accuracy ↗

1 more reported result

67.0% · Claude Opus 5.5 · Vals Index · Gemini 4 Argon model card ↗

Vals Finance Agent v2 ↗58.59 %

Claude Opus 5.5 · Finance Agent v2 · Accuracy ↗

3 more reported results

58.6% · Claude Opus 5.5 · Vals Finance Agent v2 · Gemini 4 Argon model card ↗

58.6 · Claude Opus 5.5 (max) · Vals Finance Agent v2 · Muse Wonder official evaluation report ↗

56.7% · Claude Opus 5.5 (max, with fallback) · Vals Finance Agent v2 · Frontier Finance · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

Harvey Legal Agent Benchmark ↗3.75 %

Claude Opus 5.5 · Harvey's Legal Agent Benchmark v1 · Accuracy ↗

1 more reported result

3.8% · Claude Opus 5.5 · Harvey LAB · Vals v1 · Gemini 4 Argon model card ↗

DeepSWE v1.1 ↗74.2%

Claude Opus 5.5 · DeepSWE v1.1 ↗

2 more reported results

74.2 · Claude Opus 5.5 (max) · DeepSWE 1.1 · Muse Wonder official evaluation report ↗

74.2% · Claude Opus 5.5 (max, with fallback) · DeepSWE v1.1 · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

FrontierSWE v2 ↗62.3%

Claude Opus 5.5 · FrontierSWE v2 ↗

1 more reported result

62.33% · Claude Opus 5.5 (max) · FrontierSWE · Score · % · Epoch AI · FrontierSWE ↗

Vibe Code Bench ↗90.29 %

Claude Opus 5.5 (OpenHands) · Vibe Code Bench · original task set ↗

2 more reported results

30.36 % · Claude Opus 5.5 · Vibe Code Bench · Vibe Code Bench 1–100 · Vals AI · Vibe Code Bench 1-100 ↗

90.3% · Claude Opus 5.5 · Vibe Code Bench · version unspecified in launch report · Gemini 4 Argon model card ↗

PostTrainBench ↗49.3%

Claude Opus 5.5 · PostTrainBench ↗

1 more reported result

43.8% · Claude Opus 5.5 (max, with fallback) · PostTrainBench · PostTrain Bench v1.2 · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

LABBench 2 ↗73.1%

Claude Opus 5.5 · LABBench 2 ↗

RiemannBench ↗69.6%

Claude Opus 5.5 · RiemannBench ↗

GraphWalks ↗90.6%

Claude Opus 5.5 · GraphWalks BFS ≤128k · F1 ↗

1 more reported result

66.8% · Claude Opus 5.5 · GraphWalks BFS 256k–1M · F1 · Gemini 4 Argon model card ↗

Agents’ Last Exam ↗38.2%

Claude Opus 5.5 · Agents’ Last Exam · pass rate ↗

2 more reported results

42.6% · Claude Opus 5.5 (max, with fallback) · Agents’ Last Exam · Agents' Last Exam (ALL) · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

40.7% · Claude Opus 5.5 (max, with fallback) · Agents’ Last Exam · Agents' Last Exam (CLI) · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

LVBench ↗83.7%

Claude Opus 5.5 · LVBench ↗

CWE-Bench ↗67.0%

Claude Opus 5.5 · CWE-Bench v1 ↗

Personal Superintelligence Index ↗55.2

Claude Opus 5.5 (max) · Personal Superintelligence Index · internal ↗

JobBench ↗75.4

Claude Opus 5.5 (max) · JobBench ↗

MemoryBench ↗81.5

Claude Opus 5.5 (max) · MemoryBench ↗

SWE-Marathon ↗46.3

Claude Opus 5.5 (max) · SWE-Marathon ↗

1 more reported result

46.3% · Claude Opus 5.5 (max, with fallback) · SWE-Marathon · SWE Marathon v1.1 · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

ProgramBench ↗18.5 %

Claude Opus 5.5 · ProgramBench · Accuracy ↗

2 more reported results

70.5 · Claude Opus 5.5 (max) · ProgramBench · Muse Wonder official evaluation report ↗

65% · Claude Opus 5.5 (max, with fallback) · ProgramBench · Program Bench · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

STEMBench ↗2.621 / 4

Claude Opus 5.5 · STEMBench120 · mean progress / 4 · closed ↗

ErdősBench ↗3.240 / 4

Claude Opus 5.5 xhigh · ErdősBench · mean progress / 4 · API ↗

GPQA Diamond ↗90.59%

Claude Opus 5.5 (max) · GPQA diamond · Best score (across scorers) · % ↗

1 more reported result

93.9% · Claude Opus 5.5 (max, with fallback) · GPQA Diamond · GPQA-Diamond · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

FrontierMath Tiers 1-3 (v2) ↗91.23%

Claude Opus 5.5 (max) · FrontierMath-Tiers-1-3-v2-Private · Best score (across scorers) · % ↗

FrontierMath Tier 4 (v2) ↗95%

Claude Opus 5.5 (max) · FrontierMath-Tier-4-v2-Private · Best score (across scorers) · % ↗

OTIS Mock AIME 2024-2025 ↗100%

Claude Opus 5.5 (max) · OTIS Mock AIME 2024-2025 · Best score (across scorers) · % ↗

SimpleQA Verified ↗72.2%

Claude Opus 5.5 (max) · SimpleQA Verified · Best score (across scorers) · % ↗

Chess Puzzles ↗67%

Claude Opus 5.5 (max) · Chess Puzzles · Best score (across scorers) · % ↗

Earthborne Rangers (EBR-bench) ↗71.43%

Claude Opus 5.5 (max) · EBR-bench · Best score (across scorers) · % ↗

Mystery Game Puzzles ↗71%

Claude Opus 5.5 (max) · Mystery Game Puzzles · Best score (across scorers) · % ↗

MirrorCode ↗77.4%

Claude Opus 5.5 (max) · MirrorCode · Best score (across scorers) · % ↗

ARC-AGI-1 ↗98.5%

Claude Opus 5.5 (high) · ARC-AGI · Score · % ↗

4 more reported results

97.5% · Claude Opus 5.5 (max) · ARC-AGI · Score · % · Epoch AI · ARC-AGI ↗

97.5% · Claude Opus 5.5 (xhigh) · ARC-AGI · Score · % · Epoch AI · ARC-AGI ↗

97.5% · Claude Opus 5.5 (medium) · ARC-AGI · Score · % · Epoch AI · ARC-AGI ↗

88.5% · Claude Opus 5.5 (low) · ARC-AGI · Score · % · Epoch AI · ARC-AGI ↗

APEX-Agents · original ↗73.5%

Claude Opus 5.5 (max) · APEX-Agents · Pass@1 score · % ↗

2 more reported results

52.5% · Claude Opus 5.5 (medium) · APEX-Agents · Pass@1 score · % · Epoch AI · APEX-Agents ↗

73.5% · Claude Opus 5.5 (max, with fallback) · APEX-Agents · original · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

ARC-AGI-2 ↗93.33%

Claude Opus 5.5 (high) · ARC-AGI-2 · Score · % ↗

4 more reported results

92.5% · Claude Opus 5.5 (xhigh) · ARC-AGI-2 · Score · % · Epoch AI · ARC-AGI-2 ↗

91.67% · Claude Opus 5.5 (max) · ARC-AGI-2 · Score · % · Epoch AI · ARC-AGI-2 ↗

87.5% · Claude Opus 5.5 (medium) · ARC-AGI-2 · Score · % · Epoch AI · ARC-AGI-2 ↗

70.14% · Claude Opus 5.5 (low) · ARC-AGI-2 · Score · % · Epoch AI · ARC-AGI-2 ↗

ProofBench ↗100 %

Claude Opus 5.5 · ProofBench · Accuracy ↗

1 more reported result

100% · Claude Opus 5.5 (max) · ProofBench · Accuracy · % · Epoch AI · ProofBench ↗

LMCA ↗68.23%

Claude Opus 5.5 (max) · LMCA · Score · % ↗

4 more reported results

66.18% · Claude Opus 5.5 (xhigh) · LMCA · Score · % · Epoch AI · LMCA ↗

65.91% · Claude Opus 5.5 (high) · LMCA · Score · % · Epoch AI · LMCA ↗

65.66% · Claude Opus 5.5 (medium) · LMCA · Score · % · Epoch AI · LMCA ↗

64.92% · Claude Opus 5.5 (low) · LMCA · Score · % · Epoch AI · LMCA ↗

DTBench ↗98.93%

Claude Opus 5.5 (max) · DTBench · Accuracy · % ↗

4 more reported results

97.33% · Claude Opus 5.5 (xhigh) · DTBench · Accuracy · % · Epoch AI · DTBench ↗

96.53% · Claude Opus 5.5 (high) · DTBench · Accuracy · % · Epoch AI · DTBench ↗

96.53% · Claude Opus 5.5 (medium) · DTBench · Accuracy · % · Epoch AI · DTBench ↗

95.47% · Claude Opus 5.5 (low) · DTBench · Accuracy · % · Epoch AI · DTBench ↗

FrontierMath: Erdős (Lean 4) ↗2.94%

Claude Opus 5.5 (max) · FrontierMath-Erdos · Best score (across scorers) · % ↗

Furniture Assembly Benchmark ↗83.33%

Claude Opus 5.5 (max) · Furniture Assembly · Best score (across scorers) · % ↗

Text Arena (Coding) ↗1820.31 Elo

Claude Opus 5.5 (max) · WebDev Arena · Elo ↗

WeirdML (v3) ↗49.83%

Claude Opus 5.5 (xhigh) · WeirdML v3 · Max performance · % ↗

SpireClimb ↗3.33%

Claude Opus 5.5 (max) · SpireClimb · Best score (across scorers) · % ↗

Epoch Capabilities Index (ECI) ↗168.83 ECI

Claude Opus 5.5 · General ECI · 26 October 2026 fit ↗

Vals RSI Index ↗0.46 reference score

Claude Opus 5.5 (max) · Compression · reference-anchored score ↗

3 more reported results

0.53 reference score · Claude Opus 5.5 (max) · LM training · reference-anchored score · Vals RSI Index · LM training ↗

0.15 reference score · Claude Opus 5.5 (max) · Harness engineering · reference-anchored score · Vals RSI Index · Harness engineering ↗

0.35 reference score · Claude Opus 5.5 (max) · Post-training · reference-anchored score · Vals RSI Index · Post-training ↗

Vals Finance Index ↗65.59 %

Claude Opus 5.5 · Vals Finance Index · Accuracy ↗

Vals Legal Index ↗72.33 %

Claude Opus 5.5 · Vals Legal Index · Accuracy ↗

Vals Science Index ↗58.65 %

Claude Opus 5.5 · Vals Science Index · Accuracy ↗

Legal Research Bench ↗50.48 %

Claude Opus 5.5 · Legal Research Bench · All-Pass ↗

HLAB-Vals-1.1 ↗9.17 %

Claude Opus 5.5 · HLAB-Vals-1.1 · Task Pass Rate ↗

Vals Finance Agent v2.1 ↗67.85 %

Claude Opus 5.5 · Finance Agent · Accuracy ↗

Excel Modeling Benchmark (EMB & EMB v1.1) ↗75.84 %

Claude Opus 5.5 · Excel Modeling Benchmark · Accuracy ↗

1 more reported result

75.94 % · Claude Opus 5.5 · Excel Modeling Benchmark v1 · Accuracy · Vals AI · Excel Modeling Benchmark v1 ↗

Tax Agent Bench ↗45.57 %

Claude Opus 5.5 · Tax Agent Bench · Accuracy ↗

MedCode ↗49.8 %

Claude Opus 5.5 · MedCode · Accuracy ↗

MedScribe ↗91.43 %

Claude Opus 5.5 · MedScribe · Accuracy ↗

SAFE-Teen ↗27%

Claude Opus 5.5 · Urgent safety · share of applicable ratings marked fail ↗

2 more reported results

44% · Claude Opus 5.5 · Health advice · share of applicable ratings marked fail · Vals AI · SAFE-Teen ↗

25% · Claude Opus 5.5 · Relationship boundaries · share of applicable ratings marked fail · Vals AI · SAFE-Teen ↗

BioMysteryBench ↗79.26 %

Claude Opus 5.5 · BioMysteryBench · Accuracy ↗

1 more reported result

81.9% · Claude Opus 5.5 (max, with fallback) · BioMysteryBench · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

MysteryMechanism ↗49.55 %

Claude Opus 5.5 · MysteryMechanism · Accuracy ↗

Robo-bench ↗14.58 %

Claude Opus 5.5 · Robo-bench · Accuracy ↗

SAGE (Student Assessment with Generative Evaluation) ↗45.83 %

Claude Opus 5.5 · SAGE · Accuracy ↗

Code Migration v1.1 ↗81.01 %

Claude Opus 5.5 · Code Migration · Accuracy ↗

1 more reported result

66.65 % · Claude Opus 5.5 · Code Migration v1 · Accuracy · Vals AI · Code Migration v1 ↗

IOI v1 & IOI v2 ↗95.06 %

Claude Opus 5.5 · IOI · Accuracy ↗

SWE-bench Multimodal ↗70.21 %

Claude Opus 5.5 · SWE-bench Multimodal · Accuracy ↗

CyberBench v1.1 ↗55.36 %

Claude Opus 5.5 · CyberBench · Accuracy ↗

SRE-Bench ↗33.59 %

Claude Opus 5.5 · SRE Bench · Accuracy ↗

CUA-bench ↗14 %

Claude Opus 5.5 · CUA-bench · Accuracy ↗

Time Horizon Index: KSP ↗91.33 %

Claude Opus 5.5 · Time Horizon Index: KSP · Overall ↗

Public Benefits Bench v1.1 ↗70.64 %

Claude Opus 5.5 · Public Benefits Bench · Accuracy ↗

Humanity's Sixth Sense (HSS) ↗44.60%

Claude-Opus-5.5 (xhigh) · Humanity's Sixth Sense · Score ↗

DistressBench ↗75.58%

claude-opus-5.5 · DistressBench · Score ↗

HiL-Bench (Human-in-Loop Benchmark) ↗59.00%

Claude Opus 5.5 · HiL-Bench (Human-in-Loop Benchmark) · Score ↗

PRBench — Legal (Professional Reasoning) ↗47.58%

claude-opus-5-5 · Scale Labs · Score ↗

Remote Labor Index ↗21.25%

Opus 5.5 · Scale Labs · Score ↗

Fortress ↗13.18%

claude-opus-5-5 · Scale Labs · Risk elicitation score ↗

TasteVal ↗2.3 ×

Opus 5.5 (max) · TasteVal · Experimental compute multiplier · October 2026 paper comparison ↗

1 more reported result

1.14 × · Opus 5.5 (max) · TasteVal · Normalized final-performance multiplier · October 2026 paper comparison · TasteVal: Measuring the Experimental Research Taste of AI Systems Against Human Experts ↗

FocusBench ↗45.8%

Claude Opus 5.5 (max) · FocusBench · score · Meta · Muse Wonder launch · maximum effort ↗

BenchCAD ↗73%

Claude Opus 5.5 (max, with fallback) · BenchCAD · BenchCAD w/o tools · Kimi K3.1 Pro · complete release comparison ↗

1 more reported result

96.2% · Claude Opus 5.5 (max, with fallback) · BenchCAD · BenchCAD w/ tools · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

Kimi Code Bench 3.0 ↗58.5%

Claude Opus 5.5 (max, with fallback) · Kimi Code Bench 3.0 · Kimi Code Bench 3.0 Long-horizon (Internal) · Kimi K3.1 Pro · complete release comparison ↗

BrowseComp ↗90.8%

Claude Opus 5.5 (max, with fallback) · BrowseComp · Kimi K3.1 Pro · complete release comparison ↗

CharXiv ↗93.8%

Claude Opus 5.5 (max, with fallback) · CharXiv · CharXiv (RQ) w/ python · Kimi K3.1 Pro · complete release comparison ↗

1 more reported result

92.1% · Claude Opus 5.5 (max, with fallback) · CharXiv · CharXiv (RQ) · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

BabyVision ↗97.7%

Claude Opus 5.5 (max, with fallback) · BabyVision · BabyVision w/ python · Kimi K3.1 Pro · complete release comparison ↗

ZeroBench ↗61%

Claude Opus 5.5 (max, with fallback) · ZeroBench · ZeroBench_main w/ python (pass@5) · Kimi K3.1 Pro · complete release comparison ↗

2 more reported results

35% · Claude Opus 5.5 (max, with fallback) · ZeroBench · ZeroBench_main · avg@5 · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

43% · Claude Opus 5.5 (max, with fallback) · ZeroBench · ZeroBench_main · pass@5 · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

OfficeQA Pro ↗62.2%

Claude Opus 5.5 (max, with fallback) · OfficeQA Pro · OfficeQA Pro v2 ↗

HANDBOOK.md ↗41.5%

Claude Opus 5.5 (max, with fallback) · HANDBOOK.md · Kimi K3.1 Pro · complete release comparison ↗

DECK-Arena ↗1253 Elo

Claude Opus 5.5 (max, with fallback) · DECK-Arena · DECK-Arena (Internal, Elo-score) · Kimi K3.1 Pro · complete release comparison ↗

Design Bench ↗927 Elo

Claude Opus 5.5 (max, with fallback) · Design Bench · Design Bench (Internal, Elo-score) · Kimi K3.1 Pro · complete release comparison ↗

Kimi Hallucination Benchmark ↗15%

Claude Opus 5.5 (max, with fallback) · Kimi Hallucination Benchmark · Kimi Hallu Bench Hard w/ tools (Internal, lower is better) · Kimi K3.1 Pro · complete release comparison ↗

1 more reported result

6.8% · Claude Opus 5.5 (max, with fallback) · Kimi Hallucination Benchmark · Kimi Hallu Bench w/o tools (Internal, lower is better) · Kimi K3.1 Pro · complete release comparison · Introducing Kimi K3.1 Pro ↗

ExploitBench ↗91%

Claude Opus 5.5 (max, with fallback) · ExploitBench · Kimi K3.1 Pro · complete release comparison ↗

ExploitGym ↗34.5%

Claude Opus 5.5 (max, with fallback) · ExploitGym · Kimi K3.1 Pro · complete release comparison ↗

Vending-Bench 2 ↗9235.24833 USD

Claude Opus 5.5 · End-of-year balance ↗

GDPx v1.0 ↗12.0%

Claude Opus 5.5 · GDPx v1.0 · Overall · intended grading ↗

53 more reported results

11.7% · Claude Opus 5.5 · GDPx v1.0 · Eight-domain subset · intended grading · GDPx v1.0 — SemiAnalysis ↗

17.6% · Claude Opus 5.5 · GDPx v1.0 · Recursive Self-Improvement · intended grading · GDPx v1.0 — SemiAnalysis ↗

4.8% · Claude Opus 5.5 · GDPx v1.0 · Chip Design · intended grading · GDPx v1.0 — SemiAnalysis ↗

9.3% · Claude Opus 5.5 · GDPx v1.0 · Cybersecurity · intended grading · GDPx v1.0 — SemiAnalysis ↗

20.5% · Claude Opus 5.5 · GDPx v1.0 · Biology · intended grading · GDPx v1.0 — SemiAnalysis ↗

0.0% · Claude Opus 5.5 · GDPx v1.0 · Finance · intended grading · GDPx v1.0 — SemiAnalysis ↗

0.0% · Claude Opus 5.5 · GDPx v1.0 · Legal · intended grading · GDPx v1.0 — SemiAnalysis ↗

27.4% · Claude Opus 5.5 · GDPx v1.0 · Quant Trading · intended grading · GDPx v1.0 — SemiAnalysis ↗

18.7% · Claude Opus 5.5 · GDPx v1.0 · Hardware Design · intended grading · GDPx v1.0 — SemiAnalysis ↗

16.5% · Claude Opus 5.5 · GDPx v1.0 · Materials Science · intended grading · GDPx v1.0 — SemiAnalysis ↗

8.7% · Claude Opus 5.5 · GDPx v1.0 · Alignment · intended grading · GDPx v1.0 — SemiAnalysis ↗

8.9% · Claude Opus 5.5 · GDPx v1.0 · Software Engineering · intended grading · GDPx v1.0 — SemiAnalysis ↗

8.7% · Claude Opus 5.5 · GDPx v1.0 · Aria · Chip Design · intended grading · GDPx v1.0 — SemiAnalysis ↗

0.0% · Claude Opus 5.5 · GDPx v1.0 · Arcverex · Chip Design · intended grading · GDPx v1.0 — SemiAnalysis ↗

5.7% · Claude Opus 5.5 · GDPx v1.0 · Ergodex · Chip Design · intended grading · GDPx v1.0 — SemiAnalysis ↗

9.3% · Claude Opus 5.5 · GDPx v1.0 · Arithmetic · Cybersecurity · intended grading · GDPx v1.0 — SemiAnalysis ↗

20.5% · Claude Opus 5.5 · GDPx v1.0 · LatchBio · Biology · intended grading · GDPx v1.0 — SemiAnalysis ↗

0.0% · Claude Opus 5.5 · GDPx v1.0 · Living Context · Finance · intended grading · GDPx v1.0 — SemiAnalysis ↗

0.0% · Claude Opus 5.5 · GDPx v1.0 · Chakra · Legal · intended grading · GDPx v1.0 — SemiAnalysis ↗

27.4% · Claude Opus 5.5 · GDPx v1.0 · Third Moment · Quant Trading · intended grading · GDPx v1.0 — SemiAnalysis ↗

17.6% · Claude Opus 5.5 · GDPx v1.0 · Extrapolate · Recursive Self-Improvement · intended grading · GDPx v1.0 — SemiAnalysis ↗

18.7% · Claude Opus 5.5 · GDPx v1.0 · Beautiful Machines · Hardware Design · intended grading · GDPx v1.0 — SemiAnalysis ↗

16.7% · Claude Opus 5.5 · GDPx v1.0 · ValenceForge · Materials Science · intended grading · GDPx v1.0 — SemiAnalysis ↗

16.4% · Claude Opus 5.5 · GDPx v1.0 · Emulated · Materials Science · intended grading · GDPx v1.0 — SemiAnalysis ↗

8.7% · Claude Opus 5.5 · GDPx v1.0 · Fleet · Alignment · intended grading · GDPx v1.0 — SemiAnalysis ↗

8.9% · Claude Opus 5.5 · GDPx v1.0 · Datacurve · Software Engineering · intended grading · GDPx v1.0 — SemiAnalysis ↗

22.5% · Claude Opus 5.5 · GDPx v1.0 · Overall · partial credit · GDPx v1.0 — SemiAnalysis ↗

24.9% · Claude Opus 5.5 · GDPx v1.0 · Eight-domain subset · partial credit · GDPx v1.0 — SemiAnalysis ↗

17.6% · Claude Opus 5.5 · GDPx v1.0 · Recursive Self-Improvement · partial credit · GDPx v1.0 — SemiAnalysis ↗

12.1% · Claude Opus 5.5 · GDPx v1.0 · Chip Design · partial credit · GDPx v1.0 — SemiAnalysis ↗

11.8% · Claude Opus 5.5 · GDPx v1.0 · Cybersecurity · partial credit · GDPx v1.0 — SemiAnalysis ↗

27.4% · Claude Opus 5.5 · GDPx v1.0 · Biology · partial credit · GDPx v1.0 — SemiAnalysis ↗

54.6% · Claude Opus 5.5 · GDPx v1.0 · Finance · partial credit · GDPx v1.0 — SemiAnalysis ↗

29.9% · Claude Opus 5.5 · GDPx v1.0 · Legal · partial credit · GDPx v1.0 — SemiAnalysis ↗

27.4% · Claude Opus 5.5 · GDPx v1.0 · Quant Trading · partial credit · GDPx v1.0 — SemiAnalysis ↗

18.7% · Claude Opus 5.5 · GDPx v1.0 · Hardware Design · partial credit · GDPx v1.0 — SemiAnalysis ↗

30.1% · Claude Opus 5.5 · GDPx v1.0 · Materials Science · partial credit · GDPx v1.0 — SemiAnalysis ↗

8.7% · Claude Opus 5.5 · GDPx v1.0 · Alignment · partial credit · GDPx v1.0 — SemiAnalysis ↗

8.9% · Claude Opus 5.5 · GDPx v1.0 · Software Engineering · partial credit · GDPx v1.0 — SemiAnalysis ↗

30.6% · Claude Opus 5.5 · GDPx v1.0 · Aria · Chip Design · partial credit · GDPx v1.0 — SemiAnalysis ↗

0.0% · Claude Opus 5.5 · GDPx v1.0 · Arcverex · Chip Design · partial credit · GDPx v1.0 — SemiAnalysis ↗

5.7% · Claude Opus 5.5 · GDPx v1.0 · Ergodex · Chip Design · partial credit · GDPx v1.0 — SemiAnalysis ↗

11.8% · Claude Opus 5.5 · GDPx v1.0 · Arithmetic · Cybersecurity · partial credit · GDPx v1.0 — SemiAnalysis ↗

27.4% · Claude Opus 5.5 · GDPx v1.0 · LatchBio · Biology · partial credit · GDPx v1.0 — SemiAnalysis ↗

54.6% · Claude Opus 5.5 · GDPx v1.0 · Living Context · Finance · partial credit · GDPx v1.0 — SemiAnalysis ↗

29.9% · Claude Opus 5.5 · GDPx v1.0 · Chakra · Legal · partial credit · GDPx v1.0 — SemiAnalysis ↗

27.4% · Claude Opus 5.5 · GDPx v1.0 · Third Moment · Quant Trading · partial credit · GDPx v1.0 — SemiAnalysis ↗

17.6% · Claude Opus 5.5 · GDPx v1.0 · Extrapolate · Recursive Self-Improvement · partial credit · GDPx v1.0 — SemiAnalysis ↗

18.7% · Claude Opus 5.5 · GDPx v1.0 · Beautiful Machines · Hardware Design · partial credit · GDPx v1.0 — SemiAnalysis ↗

38.7% · Claude Opus 5.5 · GDPx v1.0 · ValenceForge · Materials Science · partial credit · GDPx v1.0 — SemiAnalysis ↗

21.4% · Claude Opus 5.5 · GDPx v1.0 · Emulated · Materials Science · partial credit · GDPx v1.0 — SemiAnalysis ↗

8.7% · Claude Opus 5.5 · GDPx v1.0 · Fleet · Alignment · partial credit · GDPx v1.0 — SemiAnalysis ↗

8.9% · Claude Opus 5.5 · GDPx v1.0 · Datacurve · Software Engineering · partial credit · GDPx v1.0 — SemiAnalysis ↗

Closest models by score

Similar positions on shared benchmark leaderboards. Smaller gaps are closer.

Claude Sonnet 5.5 →Anthropic

11.6 percentile-point gap

59 of 74 shared benchmark comparisons

Claude Fable 5.1 →Anthropic

13.3 percentile-point gap

62 of 74 shared benchmark comparisons

GPT-6 Astra →OpenAI

17.0 percentile-point gap

68 of 74 shared benchmark comparisons

How similarity is measured

Mean absolute gap in percentile positions on shared benchmark settings; lower is closer. At least 60% overlap is required, with a minimum of three when available. Independent evaluations are used when there are at least three; otherwise published report comparisons are used. Repeated model observations within one setting are averaged before ranking. Writing-style traits and composite indices are excluded. This describes similarity, not an overall quality ranking.

About the model report

Effort settings and safeguard fallbacks differ by evaluation. The linked launch and system card disclose those conditions. Reviewed 2026-10-25.

Read the official model report ↗

9 benchmarks in the report

Search this collection →

AGT / BENCHMARK38 reported results

GDPval-AA v2.1

Agents complete occupational work and deliver documents, analyses, and other professional artifacts.

Pairwise Elo↗

COD / BENCHMARK115 reported results

Terminal-Bench 4.0

Complex terminal work spans coding, science, infrastructure, and other technical tasks, with executable checks.

Verified task success↗

SCI / BENCHMARK90 reported results

Terminal-Bench-Science 0.1

Research workflows are completed in a terminal and checked with task-specific tests.

Verified task success↗

COD / BENCHMARK95 reported results

FrontierCode 1.1

Repository-level engineering is evaluated against the standard of work maintainers could accept.

Task success↗

RSN / BENCHMARK131 reported results

Humanity’s Last Exam

Expert-authored questions stretch academic reasoning and knowledge across many disciplines.

Answer accuracy↗

AGT / BENCHMARK13 reported results

OSWorld 2.1

The OSWorld version reported in recent launches measures computer-use agents on extended application workflows.

Partial and binary task score↗

RSN / BENCHMARK17 reported results

Chartography

Specialist charts test visual reasoning grounded in professional practice.

Professional chart accuracy↗

COD / BENCHMARK82 reported results

CursorBench 4.0

An agentic-coding evaluation appears alongside terminal and repository benchmarks in Anthropic’s release.

Agentic coding success↗

AGT / BENCHMARK20 reported results

AutomationBench · Zapier

Business workflows require an agent to coordinate real tools and leave the simulated business systems in the required final state.

Verified final-state success↗

COMPARISON CHECKLIST

Match benchmark version, task subset, model effort, harness, tool access, attempt budget, scoring rule, and fallback behavior. A shared benchmark name is the start of a comparison, not proof that two reported scores use the same contract.

Anthropic original report ↗