Benchmarks

49 results across 26 benchmarks

Benchmark results for Claude Opus 5.5
BenchmarkScoreSource
APEX-Agents OriginalEffort: Medium52.5%mercor.com for Claude Opus 5.5 (medium) on APEX-Agents Original (opens in a new tab)Archived copy (opens in a new tab)Pass rateReported Benchmark leaderboardMercorIndependentRecord for Claude Opus 5.5 on APEX-Agents Original
APEX-Agents OriginalEffort: Max73.5%mercor.com for Claude Opus 5.5 (max) on APEX-Agents Original (opens in a new tab)Archived copy (opens in a new tab)Pass rateReported Benchmark leaderboardMercorIndependentRecord for Claude Opus 5.5 on APEX-Agents Original
AutomationBench 1.0.6Effort: Max40.0%www-cdn.anthropic.com for Claude Opus 5.5 (max) on AutomationBench 1.0.6 (opens in a new tab)Task pass rateReported System cardAnthropicSelf-reportedZapier AutomationBench TeamRecord for Claude Opus 5.5 on AutomationBench 1.0.6
BrowseComp 130-question subset — Mercor web research agentEffort: MaxConfiguration: Mercor web research agent, 100 steps, 3 hours88.5%mercor.com for Claude Opus 5.5 (max) on BrowseComp 130-question subset — Mercor web research agent (opens in a new tab)Archived copy (opens in a new tab)BrowseComp AccuracyReported Benchmark leaderboardMercorIndependentRecord for Claude Opus 5.5 on BrowseComp 130-question subset — Mercor web research agent
Chartography October 2026 leaderboardEffort: MaxReported as: Adaptive/Max66.3%surgehq.ai for Claude Opus 5.5 (Adaptive/Max) on Chartography October 2026 leaderboard (opens in a new tab)Archived copy (opens in a new tab)Chartography Pass@1Reported Benchmark leaderboardSurge AIIndependentRecord for Claude Opus 5.5 on Chartography October 2026 leaderboard
CharXiv Descriptive and reasoning — Mercor single-shotEffort: MaxConfiguration: Mercor single-shot agent96.4%mercor.com for Claude Opus 5.5 (max) on CharXiv Descriptive and reasoning — Mercor single-shot (opens in a new tab)Archived copy (opens in a new tab)CharXiv AccuracyReported Benchmark leaderboardMercorIndependentRecord for Claude Opus 5.5 on CharXiv Descriptive and reasoning — Mercor single-shot
CursorBench 4.0Effort: Low43.7%cursor.com for Claude Opus 5.5 (low) on CursorBench 4.0 (opens in a new tab)Archived copy (opens in a new tab)CursorBench AccuracyReported Benchmark leaderboardCursorIndependentRecord for Claude Opus 5.5 on CursorBench 4.0
CursorBench 4.0Effort: Medium52.5%cursor.com for Claude Opus 5.5 (medium) on CursorBench 4.0 (opens in a new tab)CursorBench AccuracyReported Benchmark leaderboardCursorIndependentRecord for Claude Opus 5.5 on CursorBench 4.0
CursorBench 4.0Effort: High56.0%cursor.com for Claude Opus 5.5 (high) on CursorBench 4.0 (opens in a new tab)Archived copy (opens in a new tab)CursorBench AccuracyReported Benchmark leaderboardCursorIndependentRecord for Claude Opus 5.5 on CursorBench 4.0
CursorBench 4.0Effort: xHigh56.0%cursor.com for Claude Opus 5.5 (xhigh) on CursorBench 4.0 (opens in a new tab)Archived copy (opens in a new tab)CursorBench AccuracyReported Benchmark leaderboardCursorIndependentRecord for Claude Opus 5.5 on CursorBench 4.0
CursorBench 4.0Effort: Max57.8%cursor.com for Claude Opus 5.5 (max) on CursorBench 4.0 (opens in a new tab)CursorBench AccuracyReported Benchmark leaderboardCursorIndependentRecord for Claude Opus 5.5 on CursorBench 4.0
CWE-bench 1 — Claude CodeEffort: HighConfiguration: Claude Code harness67.0%cwe-bench.com for Claude Opus 5.5 (high) on CWE-bench 1 — Claude Code (opens in a new tab)Archived copy (opens in a new tab)CWE-bench Programmatic Pass@1Reported Benchmark leaderboardCollinear AIIndependentRecord for Claude Opus 5.5 on CWE-bench 1 — Claude Code
DeepSWE 1.1Effort: Max74.2%www-cdn.anthropic.com for Claude Opus 5.5 (max) on DeepSWE 1.1 (opens in a new tab)DeepSWE Pass@1Reported System cardAnthropicSelf-reportedRecord for Claude Opus 5.5 on DeepSWE 1.1
DeepSWE 1.1 — Mercor mini-swe-agent, 500 stepsEffort: MaxConfiguration: Mercor mini-swe-agent, 500 steps, 2 hours72.3%mercor.com for Claude Opus 5.5 (max) on DeepSWE 1.1 — Mercor mini-swe-agent, 500 steps (opens in a new tab)Archived copy (opens in a new tab)DeepSWE Pass@1Reported Benchmark leaderboardMercorIndependentRecord for Claude Opus 5.5 on DeepSWE 1.1 — Mercor mini-swe-agent, 500 steps
Finance Agent Benchmark 2 — October 2026 evaluation58.6%vals.ai for Claude Opus 5.5 on Finance Agent Benchmark 2 — October 2026 evaluation (opens in a new tab)Archived copy (opens in a new tab)Finance Agent AccuracyReported Benchmark leaderboardVals AIIndependentRecord for Claude Opus 5.5 on Finance Agent Benchmark 2 — October 2026 evaluation
FrontierSWE 2 — October 2026 evaluationConfiguration: Proximus harness, 5 trials, 20-hour budget62.3%frontierswe.com for Claude Opus 5.5 on FrontierSWE 2 — October 2026 evaluation (opens in a new tab)Archived copy (opens in a new tab)FrontierSWE ScoreReported Benchmark leaderboardProximalIndependentRecord for Claude Opus 5.5 on FrontierSWE 2 — October 2026 evaluation
Global MMLU OriginalEffort: Max94.3%www-cdn.anthropic.com for Claude Opus 5.5 (max) on Global MMLU Original (opens in a new tab)Average accuracyReported System cardAnthropicSelf-reportedRecord for Claude Opus 5.5 on Global MMLU Original
GPQA Diamond — Epoch AI harnessEffort: MaxConfiguration: Epoch AI harness90.6%epoch.ai for Claude Opus 5.5 (max) on Graduate-Level Google-Proof Q&A Diamond — Epoch AI harness (opens in a new tab)Archived copy (opens in a new tab)GPQA Diamond AccuracyReported Evaluated Benchmark leaderboardEpoch AIIndependentRecord for Claude Opus 5.5 on Graduate-Level Google-Proof Q&A Diamond — Epoch AI harness
GPQA Diamond — Mercor single-shotEffort: MaxConfiguration: Mercor single-shot agent91.3%mercor.com for Claude Opus 5.5 (max) on Graduate-Level Google-Proof Q&A Diamond — Mercor single-shot (opens in a new tab)Archived copy (opens in a new tab)GPQA Diamond AccuracyReported Benchmark leaderboardMercorIndependentRecord for Claude Opus 5.5 on Graduate-Level Google-Proof Q&A Diamond — Mercor single-shot
HLAB October 2026 evaluation3.8%vals.ai for Claude Opus 5.5 on Harvey's Legal Agent Benchmark October 2026 evaluation (opens in a new tab)Archived copy (opens in a new tab)HLAB Task Pass RateReported Benchmark leaderboardVals AIIndependentRecord for Claude Opus 5.5 on Harvey's Legal Agent Benchmark October 2026 evaluation
Humanity's Last Exam Full set — No toolsEffort: LowConfiguration: No tools52.9%www-cdn.anthropic.com for Claude Opus 5.5 (low) on Humanity's Last Exam Full set — No tools (opens in a new tab)Humanity's Last Exam AccuracyReported System cardAnthropicSelf-reportedRecord for Claude Opus 5.5 on Humanity's Last Exam Full set — No tools
Humanity's Last Exam Full set — No toolsEffort: MediumConfiguration: No tools59.0%www-cdn.anthropic.com for Claude Opus 5.5 (medium) on Humanity's Last Exam Full set — No tools (opens in a new tab)Humanity's Last Exam AccuracyReported System cardAnthropicSelf-reportedRecord for Claude Opus 5.5 on Humanity's Last Exam Full set — No tools
Humanity's Last Exam Full set — No toolsEffort: HighConfiguration: No tools59.6%www-cdn.anthropic.com for Claude Opus 5.5 (high) on Humanity's Last Exam Full set — No tools (opens in a new tab)Humanity's Last Exam AccuracyReported System cardAnthropicSelf-reportedRecord for Claude Opus 5.5 on Humanity's Last Exam Full set — No tools
Humanity's Last Exam Full set — No toolsEffort: xHighConfiguration: No tools62.8%www-cdn.anthropic.com for Claude Opus 5.5 (xhigh) on Humanity's Last Exam Full set — No tools (opens in a new tab)Humanity's Last Exam AccuracyReported System cardAnthropicSelf-reportedRecord for Claude Opus 5.5 on Humanity's Last Exam Full set — No tools
Humanity's Last Exam Full set — No toolsEffort: MaxConfiguration: No tools64.4%www-cdn.anthropic.com for Claude Opus 5.5 (max) on Humanity's Last Exam Full set — No tools (opens in a new tab)Humanity's Last Exam AccuracyReported System cardAnthropicSelf-reportedRecord for Claude Opus 5.5 on Humanity's Last Exam Full set — No tools
Humanity's Last Exam Full set — With toolsEffort: LowConfiguration: With tools57.4%www-cdn.anthropic.com for Claude Opus 5.5 (low) on Humanity's Last Exam Full set — With tools (opens in a new tab)Humanity's Last Exam AccuracyReported System cardAnthropicSelf-reportedRecord for Claude Opus 5.5 on Humanity's Last Exam Full set — With tools
Humanity's Last Exam Full set — With toolsEffort: MediumConfiguration: With tools63.0%www-cdn.anthropic.com for Claude Opus 5.5 (medium) on Humanity's Last Exam Full set — With tools (opens in a new tab)Humanity's Last Exam AccuracyReported System cardAnthropicSelf-reportedRecord for Claude Opus 5.5 on Humanity's Last Exam Full set — With tools
Humanity's Last Exam Full set — With toolsEffort: HighConfiguration: With tools63.9%www-cdn.anthropic.com for Claude Opus 5.5 (high) on Humanity's Last Exam Full set — With tools (opens in a new tab)Humanity's Last Exam AccuracyReported System cardAnthropicSelf-reportedRecord for Claude Opus 5.5 on Humanity's Last Exam Full set — With tools
Humanity's Last Exam Full set — With toolsEffort: xHighConfiguration: With tools66.4%www-cdn.anthropic.com for Claude Opus 5.5 (xhigh) on Humanity's Last Exam Full set — With tools (opens in a new tab)Humanity's Last Exam AccuracyReported System cardAnthropicSelf-reportedRecord for Claude Opus 5.5 on Humanity's Last Exam Full set — With tools
Humanity's Last Exam Full set — With toolsEffort: MaxReported as: adaptive thinking, max; with toolsConfiguration: With tools67.7%anthropic.com for Claude Opus 5.5 (adaptive thinking, max; with tools) on Humanity's Last Exam Full set — With tools (opens in a new tab)Humanity's Last Exam AccuracyReported Launch postAnthropicSelf-reportedRecord for Claude Opus 5.5 on Humanity's Last Exam Full set — With tools
Humanity's Last Exam Text only — Mercor single-shotEffort: MaxConfiguration: Mercor single-shot agent57.4%mercor.com for Claude Opus 5.5 (max) on Humanity's Last Exam Text only — Mercor single-shot (opens in a new tab)Archived copy (opens in a new tab)Humanity's Last Exam AccuracyReported Benchmark leaderboardMercorIndependentRecord for Claude Opus 5.5 on Humanity's Last Exam Text only — Mercor single-shot
MedXpertQA MM — Mercor single-shotEffort: MaxConfiguration: Mercor single-shot agent85.7%mercor.com for Claude Opus 5.5 (max) on MedXpertQA MM — Mercor single-shot (opens in a new tab)Archived copy (opens in a new tab)AccuracyReported Benchmark leaderboardMercorIndependentRecord for Claude Opus 5.5 on MedXpertQA MM — Mercor single-shot
MMLU-Pro Original — Mercor single-shotEffort: MaxConfiguration: Mercor single-shot agent93.4%mercor.com for Claude Opus 5.5 (max) on MMLU-Pro Original — Mercor single-shot (opens in a new tab)Archived copy (opens in a new tab)AccuracyReported Benchmark leaderboardMercorIndependentRecord for Claude Opus 5.5 on MMLU-Pro Original — Mercor single-shot
MMMU-Pro 1,730 questions — Mercor single-shotEffort: MaxConfiguration: Mercor single-shot agent87.4%mercor.com for Claude Opus 5.5 (max) on MMMU-Pro 1,730 questions — Mercor single-shot (opens in a new tab)Archived copy (opens in a new tab)MMMU-Pro accuracySetting: Not statedReported Benchmark leaderboardMercorIndependentRecord for Claude Opus 5.5 on MMMU-Pro 1,730 questions — Mercor single-shot
MILU OriginalEffort: Max93.1%www-cdn.anthropic.com for Claude Opus 5.5 (max) on Multi-task Indic Language Understanding Benchmark Original (opens in a new tab)Average accuracyReported System cardAnthropicSelf-reportedRecord for Claude Opus 5.5 on Multi-task Indic Language Understanding Benchmark Original
PostTrainBench 1.2 — Claude CodeEffort: MaxConfiguration: Claude Code harness43.8%posttrainbench.com for Claude Opus 5.5 (Max) on PostTrainBench 1.2 — Claude Code (opens in a new tab)Archived copy (opens in a new tab)PostTrainBench Weighted AggregateReported Benchmark leaderboardPostTrainBenchIndependentPostTrainBench TeamRecord for Claude Opus 5.5 on PostTrainBench 1.2 — Claude Code
Riemann-bench October 2026 leaderboardEffort: MaxReported as: Adaptive/Max69.6%surgehq.ai for Claude Opus 5.5 (Adaptive/Max) on Riemann-bench October 2026 leaderboard (opens in a new tab)Archived copy (opens in a new tab)Riemann-bench Pass@1Reported Benchmark leaderboardSurge AIIndependentRecord for Claude Opus 5.5 on Riemann-bench October 2026 leaderboard
SimpleQA Verified Original — Epoch AI harnessEffort: MaxConfiguration: Epoch AI harness72.2%epoch.ai for Claude Opus 5.5 (max) on SimpleQA Verified Original — Epoch AI harness (opens in a new tab)Archived copy (opens in a new tab)AccuracyReported Evaluated Benchmark leaderboardEpoch AIIndependentRecord for Claude Opus 5.5 on SimpleQA Verified Original — Epoch AI harness
SWE Atlas Codebase QnA — Mercor mini-swe-agent, 250 stepsEffort: MaxConfiguration: Mercor mini-swe-agent, 250 steps, 1 hour48.9%mercor.com for Claude Opus 5.5 (max) on SWE Atlas Codebase QnA — Mercor mini-swe-agent, 250 steps (opens in a new tab)Archived copy (opens in a new tab)Mean pass@1Reported Benchmark leaderboardMercorIndependentRecord for Claude Opus 5.5 on SWE Atlas Codebase QnA — Mercor mini-swe-agent, 250 steps
SWE-bench MultilingualEffort: Max93.9%www-cdn.anthropic.com for Claude Opus 5.5 (max) on SWE-bench Multilingual (opens in a new tab)Resolved TasksReported System cardAnthropicSelf-reportedRecord for Claude Opus 5.5 on SWE-bench Multilingual
SWE-bench Multilingual — Mercor mini-swe-agent, 1000 stepsEffort: MaxConfiguration: Mercor mini-swe-agent, 1000 steps, 3 hours95.5%mercor.com for Claude Opus 5.5 (max) on SWE-bench Multilingual — Mercor mini-swe-agent, 1000 steps (opens in a new tab)Archived copy (opens in a new tab)Resolved TasksReported Benchmark leaderboardMercorIndependentRecord for Claude Opus 5.5 on SWE-bench Multilingual — Mercor mini-swe-agent, 1000 steps
SWE-bench Verified — Mercor mini-swe-agent, 1000 stepsEffort: MaxConfiguration: Mercor mini-swe-agent, 1000 steps, 3 hours98.2%mercor.com for Claude Opus 5.5 (max) on SWE-bench Verified — Mercor mini-swe-agent, 1000 steps (opens in a new tab)Archived copy (opens in a new tab)Resolved TasksReported Benchmark leaderboardMercorIndependentRecord for Claude Opus 5.5 on SWE-bench Verified — Mercor mini-swe-agent, 1000 steps
SWE-bench Pro PublicEffort: Max89.9%www-cdn.anthropic.com for Claude Opus 5.5 (max) on SWE-bench Pro Public (opens in a new tab)Public tasks resolvedReported System cardAnthropicSelf-reportedRecord for Claude Opus 5.5 on SWE-bench Pro Public
Terminal-Bench 4.0Effort: xHigh66.4%anthropic.com for Claude Opus 5.5 (xhigh) on Terminal-Bench 4.0 (opens in a new tab)Terminal-Bench AccuracyReported Launch postAnthropicSelf-reportedRecord for Claude Opus 5.5 on Terminal-Bench 4.0
Terminal-Bench 4.0Effort: Max64.8%www-cdn.anthropic.com for Claude Opus 5.5 (max) on Terminal-Bench 4.0 (opens in a new tab)Terminal-Bench AccuracyReported System cardAnthropicSelf-reportedRecord for Claude Opus 5.5 on Terminal-Bench 4.0
Terminal-Bench 4.0 — Claude CodeEffort: MaxConfiguration: Claude Code harness64.9%tbench.ai for Claude Opus 5.5 (max) on Terminal-Bench 4.0 — Claude Code (opens in a new tab)Archived copy (opens in a new tab)Terminal-Bench AccuracyReported Benchmark leaderboardTerminal-BenchIndependentTerminal-Bench TeamRecord for Claude Opus 5.5 on Terminal-Bench 4.0 — Claude Code
Terminal-Bench 4.0 — Mercor mini-swe-agentEffort: MaxConfiguration: Mercor mini-swe-agent, 1000 steps, 8 hours58.3%mercor.com for Claude Opus 5.5 (max) on Terminal-Bench 4.0 — Mercor mini-swe-agent (opens in a new tab)Archived copy (opens in a new tab)Terminal-Bench AccuracyReported Benchmark leaderboardMercorIndependentRecord for Claude Opus 5.5 on Terminal-Bench 4.0 — Mercor mini-swe-agent
Terminal-Bench Science 0.1Effort: MaxReported as: adaptive thinking, max58.7%anthropic.com for Claude Opus 5.5 (adaptive thinking, max) on Terminal-Bench Science 0.1 (opens in a new tab)Terminal-Bench AccuracyReported Launch postAnthropicSelf-reportedRecord for Claude Opus 5.5 on Terminal-Bench Science 0.1
Vibe Code Bench 1.1 — OpenHands, October 2026 evaluationConfiguration: OpenHands harness90.3%vals.ai for Claude Opus 5.5 on Vibe Code Bench 1.1 — OpenHands, October 2026 evaluation (opens in a new tab)Archived copy (opens in a new tab)Vibe Code Bench ScoreReported Benchmark leaderboardVals AIIndependentRecord for Claude Opus 5.5 on Vibe Code Bench 1.1 — OpenHands, October 2026 evaluation