APEX-Agents Original Effort: Max 46.3% mercor.com for Claude Opus 4.6 (max) on APEX-Agents Original (opens in a new tab) Archived copy (opens in a new tab) Pass rate Reported October 7, 2026 Benchmark leaderboard Mercor Independent Record for Claude Opus 4.6 on APEX-Agents Original DeepSWE 1.1 — Mercor mini-swe-agent, 500 steps Effort: Max Configuration: Mercor mini-swe-agent, 500 steps, 2 hours 31.9% mercor.com for Claude Opus 4.6 (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@1 Reported October 7, 2026 Benchmark leaderboard Mercor Independent Record for Claude Opus 4.6 on DeepSWE 1.1 — Mercor mini-swe-agent, 500 steps GPQA Diamond Effort: Max Reported as: adaptive thinking, max 91.3% www-cdn.anthropic.com for Claude Opus 4.6 (adaptive thinking, max) on Graduate-Level Google-Proof Q&A Diamond (opens in a new tab) GPQA Diamond Accuracy Reported February 5, 2026 System card Anthropic Self-reported Record for Claude Opus 4.6 on Graduate-Level Google-Proof Q&A Diamond GPQA Diamond — Epoch AI harness Effort: Max Configuration: Epoch AI harness 88.4% epoch.ai for Claude Opus 4.6 (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 Accuracy Reported October 7, 2026 Evaluated August 6, 2026 at 11:57 PM UTC Benchmark leaderboard Epoch AI Independent Record for Claude Opus 4.6 on Graduate-Level Google-Proof Q&A Diamond — Epoch AI harness GPQA Diamond — Vals AI harness Reported as: thinking Configuration: Vals AI harness: mean of zero-shot and few-shot CoT 89.6% vals.ai for Claude Opus 4.6 (thinking) on Graduate-Level Google-Proof Q&A Diamond — Vals AI harness (opens in a new tab) Archived copy (opens in a new tab) GPQA Diamond Accuracy Reported September 1, 2026 Benchmark leaderboard Vals AI Independent Record for Claude Opus 4.6 on Graduate-Level Google-Proof Q&A Diamond — Vals AI harness Humanity's Last Exam Full set — No tools Effort: Max Reported as: adaptive thinking, max Configuration: No tools 40.0% www-cdn.anthropic.com for Claude Opus 4.6 (adaptive thinking, max) on Humanity's Last Exam Full set — No tools (opens in a new tab) Humanity's Last Exam Accuracy Reported February 5, 2026 System card Anthropic Self-reported Record for Claude Opus 4.6 on Humanity's Last Exam Full set — No tools Humanity's Last Exam Full set — Scale AI evaluation Effort: None Reported as: Non-Thinking 19.0% labs.scale.com for Claude Opus 4.6 (Non-Thinking) on Humanity's Last Exam Full set — Scale AI evaluation (opens in a new tab) Archived copy (opens in a new tab) Humanity's Last Exam Accuracy Reported October 3, 2026 Benchmark leaderboard Scale AI Independent Record for Claude Opus 4.6 on Humanity's Last Exam Full set — Scale AI evaluation Humanity's Last Exam Full set — Scale AI evaluation Effort: Max Reported as: thinking-max 34.4% labs.scale.com for Claude Opus 4.6 (thinking-max) on Humanity's Last Exam Full set — Scale AI evaluation (opens in a new tab) Archived copy (opens in a new tab) Humanity's Last Exam Accuracy Reported October 3, 2026 Benchmark leaderboard Scale AI Independent Record for Claude Opus 4.6 on Humanity's Last Exam Full set — Scale AI evaluation Humanity's Last Exam Full set — With tools Effort: Max Reported as: adaptive thinking, max Configuration: With tools 53.0% www-cdn.anthropic.com for Claude Opus 4.6 (adaptive thinking, max) on Humanity's Last Exam Full set — With tools (opens in a new tab) Humanity's Last Exam Accuracy Reported February 5, 2026 System card Anthropic Self-reported Record for Claude Opus 4.6 on Humanity's Last Exam Full set — With tools Humanity's Last Exam Text only — Mercor single-shot Effort: Max Configuration: Mercor single-shot agent 35.0% mercor.com for Claude Opus 4.6 (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 Accuracy Reported October 7, 2026 Benchmark leaderboard Mercor Independent Record for Claude Opus 4.6 on Humanity's Last Exam Text only — Mercor single-shot Humanity's Last Exam Text only — Scale AI evaluation Effort: None Reported as: Non-Thinking 19.4% labs.scale.com for Claude Opus 4.6 (Non-Thinking) on Humanity's Last Exam Text only — Scale AI evaluation (opens in a new tab) Archived copy (opens in a new tab) Humanity's Last Exam Accuracy Reported October 7, 2026 Benchmark leaderboard Scale AI Independent Record for Claude Opus 4.6 on Humanity's Last Exam Text only — Scale AI evaluation Humanity's Last Exam Text only — Scale AI evaluation Effort: Max Reported as: thinking-max 36.2% labs.scale.com for Claude Opus 4.6 (thinking-max) on Humanity's Last Exam Text only — Scale AI evaluation (opens in a new tab) Archived copy (opens in a new tab) Humanity's Last Exam Accuracy Reported October 7, 2026 Benchmark leaderboard Scale AI Independent Record for Claude Opus 4.6 on Humanity's Last Exam Text only — Scale AI evaluation MCP Atlas Public, April 2026 update Effort: Max 76.8% labs.scale.com for Claude Opus 4.6 (max) on MCP Atlas Public, April 2026 update (opens in a new tab) Pass rate Reported September 24, 2026 Benchmark leaderboard Scale AI Independent Record for Claude Opus 4.6 on MCP Atlas Public, April 2026 update MMLU-Pro Original — Vals AI harness Reported as: thinking Configuration: Vals AI harness 89.1% vals.ai for Claude Opus 4.6 (thinking) on MMLU-Pro Original — Vals AI harness (opens in a new tab) Archived copy (opens in a new tab) Accuracy Reported September 1, 2026 Benchmark leaderboard Vals AI Independent Record for Claude Opus 4.6 on MMLU-Pro Original — Vals AI harness MMMU-Pro Vals AI harness Reported as: thinking Configuration: Vals AI harness 83.9% vals.ai for Claude Opus 4.6 (thinking) on MMMU-Pro Vals AI harness (opens in a new tab) Archived copy (opens in a new tab) MMMU-Pro accuracy Setting: Standard (4 options) Reported September 1, 2026 Benchmark leaderboard Vals AI Independent Record for Claude Opus 4.6 on MMMU-Pro Vals AI harness OSWorld Verified Effort: Max Reported as: adaptive thinking, max 72.7% www-cdn.anthropic.com for Claude Opus 4.6 (adaptive thinking, max) on OSWorld Verified (opens in a new tab) OSWorld-Verified success rate Reported February 5, 2026 System card Anthropic Self-reported Record for Claude Opus 4.6 on OSWorld Verified Riemann-bench October 2026 leaderboard Effort: Max Reported as: Adaptive/Max 27.2% surgehq.ai for Claude Opus 4.6 (Adaptive/Max) on Riemann-bench October 2026 leaderboard (opens in a new tab) Archived copy (opens in a new tab) Riemann-bench Pass@1 Reported October 7, 2026 Benchmark leaderboard Surge AI Independent Record for Claude Opus 4.6 on Riemann-bench October 2026 leaderboard SimpleQA Verified Original — Epoch AI harness Effort: Max Configuration: Epoch AI harness 47.0% epoch.ai for Claude Opus 4.6 (max) on SimpleQA Verified Original — Epoch AI harness (opens in a new tab) Archived copy (opens in a new tab) Accuracy Reported October 7, 2026 Evaluated August 27, 2026 at 7:27 PM UTC Benchmark leaderboard Epoch AI Independent Record for Claude Opus 4.6 on SimpleQA Verified Original — Epoch AI harness SWE Atlas Codebase QnA — Public; Claude Code Configuration: Claude Code harness 33.3% labs.scale.com for Claude Opus 4.6 on SWE Atlas Codebase QnA — Public; Claude Code (opens in a new tab) Archived copy (opens in a new tab) Mean pass@1 Reported October 7, 2026 Benchmark leaderboard Scale AI Independent Record for Claude Opus 4.6 on SWE Atlas Codebase QnA — Public; Claude Code SWE Atlas Codebase QnA — Public; mini-swe-agent Configuration: mini-swe-agent harness 30.0% labs.scale.com for Claude Opus 4.6 on SWE Atlas Codebase QnA — Public; mini-swe-agent (opens in a new tab) Archived copy (opens in a new tab) Mean pass@1 Reported October 7, 2026 Benchmark leaderboard Scale AI Independent Record for Claude Opus 4.6 on SWE Atlas Codebase QnA — Public; mini-swe-agent SWE Atlas Refactoring — Claude Code Configuration: Claude Code harness 35.6% labs.scale.com for Claude Opus 4.6 on SWE Atlas Refactoring — Claude Code (opens in a new tab) Archived copy (opens in a new tab) Mean pass@1 Reported October 7, 2026 Benchmark leaderboard Scale AI Independent Record for Claude Opus 4.6 on SWE Atlas Refactoring — Claude Code SWE-bench Multilingual Effort: Max Reported as: adaptive thinking, max 77.8% www-cdn.anthropic.com for Claude Opus 4.6 (adaptive thinking, max) on SWE-bench Multilingual (opens in a new tab) Resolved Tasks Reported February 5, 2026 System card Anthropic Self-reported Record for Claude Opus 4.6 on SWE-bench Multilingual SWE-bench Multilingual — mini-swe-agent Configuration: mini-swe-agent harness 72.0% github.com for Claude Opus 4.6 on SWE-bench Multilingual — mini-swe-agent (opens in a new tab) Archived copy (opens in a new tab) Resolved Tasks Reported February 13, 2026 Benchmark repository SWE-bench Independent SWE-bench Team Record for Claude Opus 4.6 on SWE-bench Multilingual — mini-swe-agent SWE-bench Verified Effort: Max Reported as: adaptive thinking, max 80.8% www-cdn.anthropic.com for Claude Opus 4.6 (adaptive thinking, max) on SWE-bench Verified (opens in a new tab) Resolved Tasks Reported February 5, 2026 System card Anthropic Self-reported Record for Claude Opus 4.6 on SWE-bench Verified SWE-bench Verified — Epoch AI harness Configuration: Epoch AI harness 75.6% epoch.ai for Claude Opus 4.6 on SWE-bench Verified — Epoch AI harness (opens in a new tab) Archived copy (opens in a new tab) Resolved Tasks Reported October 7, 2026 Evaluated February 10, 2026 at 10:23 PM UTC Benchmark leaderboard Epoch AI Independent Record for Claude Opus 4.6 on SWE-bench Verified — Epoch AI harness SWE-bench Verified — mini-swe-agent Configuration: mini-swe-agent harness 75.6% github.com for Claude Opus 4.6 on SWE-bench Verified — mini-swe-agent (opens in a new tab) Archived copy (opens in a new tab) Resolved Tasks Reported February 17, 2026 Benchmark repository SWE-bench Independent SWE-bench Team Record for Claude Opus 4.6 on SWE-bench Verified — mini-swe-agent SWE-bench Verified — Vals AI mini-swe-agent Reported as: thinking Configuration: mini-swe-agent harness 78.2% vals.ai for Claude Opus 4.6 (thinking) on SWE-bench Verified — Vals AI mini-swe-agent (opens in a new tab) Archived copy (opens in a new tab) Resolved Tasks Reported September 1, 2026 Benchmark leaderboard Vals AI Independent Record for Claude Opus 4.6 on SWE-bench Verified — Vals AI mini-swe-agent SWE-bench Pro Private — Scale AI mini-swe-agent Reported as: thinking Configuration: mini-swe-agent harness 47.1% labs.scale.com for Claude Opus 4.6 (thinking) on SWE-bench Pro Private — Scale AI mini-swe-agent (opens in a new tab) Archived copy (opens in a new tab) Public tasks resolved Reported October 7, 2026 Benchmark leaderboard Scale AI Independent Record for Claude Opus 4.6 on SWE-bench Pro Private — Scale AI mini-swe-agent SWE-bench Pro Public — Scale AI mini-swe-agent Reported as: thinking Configuration: mini-swe-agent harness 51.9% labs.scale.com for Claude Opus 4.6 (thinking) on SWE-bench Pro Public — Scale AI mini-swe-agent (opens in a new tab) Archived copy (opens in a new tab) Public tasks resolved Reported October 7, 2026 Benchmark leaderboard Scale AI Independent Record for Claude Opus 4.6 on SWE-bench Pro Public — Scale AI mini-swe-agent Terminal-Bench 2.0 Effort: Max Reported as: adaptive thinking, max 65.4% www-cdn.anthropic.com for Claude Opus 4.6 (adaptive thinking, max) on Terminal-Bench 2.0 (opens in a new tab) Terminal-Bench Accuracy Reported February 5, 2026 System card Anthropic Self-reported Record for Claude Opus 4.6 on Terminal-Bench 2.0 Terminal-Bench 2.0 — Vals AI Terminus 2 Reported as: thinking Configuration: Terminus-2 harness 58.4% vals.ai for Claude Opus 4.6 (thinking) on Terminal-Bench 2.0 — Vals AI Terminus 2 (opens in a new tab) Archived copy (opens in a new tab) Terminal-Bench Accuracy Reported June 4, 2026 Benchmark leaderboard Vals AI Independent Record for Claude Opus 4.6 on Terminal-Bench 2.0 — Vals AI Terminus 2 Vibe Code Bench 1.1 — OpenHands, October 2026 evaluation Configuration: OpenHands harness 57.6% vals.ai for Claude Opus 4.6 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 Score Reported October 6, 2026 Benchmark leaderboard Vals AI Independent Record for Claude Opus 4.6 on Vibe Code Bench 1.1 — OpenHands, October 2026 evaluation Vibe Code Bench 1.1 — OpenHands, October 2026 evaluation Reported as: thinking Configuration: OpenHands harness 53.5% vals.ai for Claude Opus 4.6 (thinking) 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 Score Reported October 6, 2026 Benchmark leaderboard Vals AI Independent Record for Claude Opus 4.6 on Vibe Code Bench 1.1 — OpenHands, October 2026 evaluation τ³-bench τ³ — Banking, AllTools retrieval, v1.0.1 grading Effort: Max Configuration: AllTools retrieval 27.3% sierra-tau-bench-public.s3.us-west-2.amazonaws.com for Claude Opus 4.6 (max) on τ³-bench τ³ — Banking, AllTools retrieval, v1.0.1 grading (opens in a new tab) Archived copy (opens in a new tab) Task success rate Reported May 6, 2026 Evaluated May 6, 2026 Benchmark leaderboard Sierra Independent Sierra Research Record for Claude Opus 4.6 on τ³-bench τ³ — Banking, AllTools retrieval, v1.0.1 grading