APEX-Agents Original Effort: High 56.2% mercor.com for Grok 4.5 (high) 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 Grok 4.5 on APEX-Agents Original BrowseComp 130-question subset — Mercor web research agent Effort: High Configuration: Mercor web research agent, 100 steps, 3 hours 75.8% mercor.com for Grok 4.5 (high) on BrowseComp 130-question subset — Mercor web research agent (opens in a new tab) Archived copy (opens in a new tab) BrowseComp Accuracy Reported October 7, 2026 Benchmark leaderboard Mercor Independent Record for Grok 4.5 on BrowseComp 130-question subset — Mercor web research agent Chartography October 2026 leaderboard Effort: High 17.0% surgehq.ai for Grok 4.5 (High) on Chartography October 2026 leaderboard (opens in a new tab) Archived copy (opens in a new tab) Chartography Pass@1 Reported October 7, 2026 Benchmark leaderboard Surge AI Independent Record for Grok 4.5 on Chartography October 2026 leaderboard CharXiv Descriptive and reasoning — Mercor single-shot Effort: High Configuration: Mercor single-shot agent 92.8% mercor.com for Grok 4.5 (high) on CharXiv Descriptive and reasoning — Mercor single-shot (opens in a new tab) Archived copy (opens in a new tab) CharXiv Accuracy Reported October 7, 2026 Benchmark leaderboard Mercor Independent Record for Grok 4.5 on CharXiv Descriptive and reasoning — Mercor single-shot DeepSWE 1.1 — Mercor mini-swe-agent, 500 steps Effort: High Configuration: Mercor mini-swe-agent, 500 steps, 2 hours 49.3% mercor.com for Grok 4.5 (high) 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 Grok 4.5 on DeepSWE 1.1 — Mercor mini-swe-agent, 500 steps Finance Agent Benchmark 2 — October 2026 evaluation Effort: High 48.3% vals.ai for Grok 4.5 (high) on Finance Agent Benchmark 2 — October 2026 evaluation (opens in a new tab) Archived copy (opens in a new tab) Finance Agent Accuracy Reported October 6, 2026 Benchmark leaderboard Vals AI Independent Record for Grok 4.5 on Finance Agent Benchmark 2 — October 2026 evaluation GPQA Diamond — Epoch AI harness Effort: High Configuration: Epoch AI harness 93.4% epoch.ai for Grok 4.5 (high) 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 July 8, 2026 at 11:54 PM UTC Benchmark leaderboard Epoch AI Independent Record for Grok 4.5 on Graduate-Level Google-Proof Q&A Diamond — Epoch AI harness GPQA Diamond — Mercor single-shot Effort: High Configuration: Mercor single-shot agent 92.4% mercor.com for Grok 4.5 (high) 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 Accuracy Reported October 7, 2026 Benchmark leaderboard Mercor Independent Record for Grok 4.5 on Graduate-Level Google-Proof Q&A Diamond — Mercor single-shot GPQA Diamond — Vals AI harness Effort: High Configuration: Vals AI harness: mean of zero-shot and few-shot CoT 92.9% vals.ai for Grok 4.5 (high) 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 Grok 4.5 on Graduate-Level Google-Proof Q&A Diamond — Vals AI harness HLAB October 2026 evaluation Effort: High 12.9% vals.ai for Grok 4.5 (high) on Harvey's Legal Agent Benchmark October 2026 evaluation (opens in a new tab) Archived copy (opens in a new tab) HLAB Task Pass Rate Reported October 6, 2026 Benchmark leaderboard Vals AI Independent Record for Grok 4.5 on Harvey's Legal Agent Benchmark October 2026 evaluation Humanity's Last Exam Text only — Mercor single-shot Effort: High Configuration: Mercor single-shot agent 41.9% mercor.com for Grok 4.5 (high) 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 Grok 4.5 on Humanity's Last Exam Text only — Mercor single-shot MedXpertQA MM — Mercor single-shot Effort: High Configuration: Mercor single-shot agent 69.5% mercor.com for Grok 4.5 (high) on MedXpertQA MM — Mercor single-shot (opens in a new tab) Archived copy (opens in a new tab) Accuracy Reported October 7, 2026 Benchmark leaderboard Mercor Independent Record for Grok 4.5 on MedXpertQA MM — Mercor single-shot MMLU-Pro Original — Mercor single-shot Effort: High Configuration: Mercor single-shot agent 88.2% mercor.com for Grok 4.5 (high) on MMLU-Pro Original — Mercor single-shot (opens in a new tab) Archived copy (opens in a new tab) Accuracy Reported October 7, 2026 Benchmark leaderboard Mercor Independent Record for Grok 4.5 on MMLU-Pro Original — Mercor single-shot MMLU-Pro Original — Vals AI harness Effort: High Configuration: Vals AI harness 89.2% vals.ai for Grok 4.5 (high) 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 Grok 4.5 on MMLU-Pro Original — Vals AI harness MMMU-Pro 1,730 questions — Mercor single-shot Effort: High Configuration: Mercor single-shot agent 79.0% mercor.com for Grok 4.5 (high) on MMMU-Pro 1,730 questions — Mercor single-shot (opens in a new tab) Archived copy (opens in a new tab) MMMU-Pro accuracy Setting: Not stated Reported October 7, 2026 Benchmark leaderboard Mercor Independent Record for Grok 4.5 on MMMU-Pro 1,730 questions — Mercor single-shot MMMU-Pro Vals AI harness Effort: High Configuration: Vals AI harness 61.8% vals.ai for Grok 4.5 (high) 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 Grok 4.5 on MMMU-Pro Vals AI harness PostTrainBench 1.1 — Cursor CLI Effort: High Configuration: Cursor CLI harness 23.5% posttrainbench.com for Grok 4.5 (High) on PostTrainBench 1.1 — Cursor CLI (opens in a new tab) Archived copy (opens in a new tab) PostTrainBench Weighted Aggregate Reported October 6, 2026 Benchmark leaderboard PostTrainBench Independent PostTrainBench Team Record for Grok 4.5 on PostTrainBench 1.1 — Cursor CLI PostTrainBench 1.2 — Cursor CLI Effort: High Configuration: Cursor CLI harness 22.6% posttrainbench.com for Grok 4.5 (High) on PostTrainBench 1.2 — Cursor CLI (opens in a new tab) Archived copy (opens in a new tab) PostTrainBench Weighted Aggregate Reported October 6, 2026 Benchmark leaderboard PostTrainBench Independent PostTrainBench Team Record for Grok 4.5 on PostTrainBench 1.2 — Cursor CLI Riemann-bench October 2026 leaderboard Effort: High 38.4% surgehq.ai for Grok 4.5 (High) 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 Grok 4.5 on Riemann-bench October 2026 leaderboard SimpleQA Verified Original — Epoch AI harness Effort: High Configuration: Epoch AI harness 48.3% epoch.ai for Grok 4.5 (high) 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 7:29 PM UTC Benchmark leaderboard Epoch AI Independent Record for Grok 4.5 on SimpleQA Verified Original — Epoch AI harness SWE Atlas Codebase QnA — Mercor mini-swe-agent, 250 steps Effort: High Configuration: Mercor mini-swe-agent, 250 steps, 1 hour 41.9% mercor.com for Grok 4.5 (high) 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@1 Reported October 7, 2026 Benchmark leaderboard Mercor Independent Record for Grok 4.5 on SWE Atlas Codebase QnA — Mercor mini-swe-agent, 250 steps SWE-bench Multilingual Effort: High 78.0% cursor.com for Grok 4.5 (high) on SWE-bench Multilingual (opens in a new tab) Resolved Tasks Reported July 14, 2026 Model card SpaceXAI and Cursor Self-reported Cursor Record for Grok 4.5 on SWE-bench Multilingual SWE-bench Multilingual — Mercor mini-swe-agent, 1000 steps Effort: High Configuration: Mercor mini-swe-agent, 1000 steps, 3 hours 87.7% mercor.com for Grok 4.5 (high) on SWE-bench Multilingual — Mercor mini-swe-agent, 1000 steps (opens in a new tab) Archived copy (opens in a new tab) Resolved Tasks Reported October 7, 2026 Benchmark leaderboard Mercor Independent Record for Grok 4.5 on SWE-bench Multilingual — Mercor mini-swe-agent, 1000 steps SWE-bench Verified — Mercor mini-swe-agent, 1000 steps Effort: High Configuration: Mercor mini-swe-agent, 1000 steps, 3 hours 81.7% mercor.com for Grok 4.5 (high) on SWE-bench Verified — Mercor mini-swe-agent, 1000 steps (opens in a new tab) Archived copy (opens in a new tab) Resolved Tasks Reported October 7, 2026 Benchmark leaderboard Mercor Independent Record for Grok 4.5 on SWE-bench Verified — Mercor mini-swe-agent, 1000 steps SWE-bench Verified — Vals AI mini-swe-agent Effort: High Configuration: mini-swe-agent harness 86.6% vals.ai for Grok 4.5 (high) 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 Grok 4.5 on SWE-bench Verified — Vals AI mini-swe-agent SWE-bench Pro Public 64.7% x.ai for Grok 4.5 on SWE-bench Pro Public (opens in a new tab) Public tasks resolved Reported July 16, 2026 Launch post SpaceXAI Self-reported Record for Grok 4.5 on SWE-bench Pro Public Terminal-Bench 2.1 83.3% x.ai for Grok 4.5 on Terminal-Bench 2.1 (opens in a new tab) Terminal-Bench Accuracy Reported July 16, 2026 Launch post SpaceXAI Self-reported Record for Grok 4.5 on Terminal-Bench 2.1 Terminal-Bench 2.1 — Mercor Terminus 2 Effort: High Configuration: Mercor Terminus 2, 1000 steps, 3 hours 79.0% mercor.com for Grok 4.5 (high) on Terminal-Bench 2.1 — Mercor Terminus 2 (opens in a new tab) Archived copy (opens in a new tab) Terminal-Bench Accuracy Reported October 7, 2026 Benchmark leaderboard Mercor Independent Record for Grok 4.5 on Terminal-Bench 2.1 — Mercor Terminus 2 Terminal-Bench 2.1 — Vals AI Terminus 2 Effort: High Configuration: Terminus-2 harness 67.8% vals.ai for Grok 4.5 (high) on Terminal-Bench 2.1 — Vals AI Terminus 2 (opens in a new tab) Archived copy (opens in a new tab) Terminal-Bench Accuracy Reported September 28, 2026 Benchmark leaderboard Vals AI Independent Record for Grok 4.5 on Terminal-Bench 2.1 — Vals AI Terminus 2 Terminal-Bench 4.0 — Grok Build Effort: High Configuration: Grok Build harness 12.4% tbench.ai for Grok 4.5 (high) on Terminal-Bench 4.0 — Grok Build (opens in a new tab) Archived copy (opens in a new tab) Terminal-Bench Accuracy Reported July 16, 2026 Benchmark leaderboard Terminal-Bench Independent Terminal-Bench Team Record for Grok 4.5 on Terminal-Bench 4.0 — Grok Build Terminal-Bench 4.0 — Vals AI mini-swe-agent Effort: High Configuration: mini-swe-agent harness 8.6% vals.ai for Grok 4.5 (high) on Terminal-Bench 4.0 — Vals AI mini-swe-agent (opens in a new tab) Archived copy (opens in a new tab) Terminal-Bench Accuracy Reported October 6, 2026 Benchmark leaderboard Vals AI Independent Record for Grok 4.5 on Terminal-Bench 4.0 — Vals AI mini-swe-agent Vals Index 2.1 Effort: High 44.7% vals.ai for Grok 4.5 (high) on Vals Index 2.1 (opens in a new tab) Archived copy (opens in a new tab) Vals Index GDP-weighted Accuracy Reported October 6, 2026 Benchmark leaderboard Vals AI Independent Record for Grok 4.5 on Vals Index 2.1 Vibe Code Bench 1.1 — OpenHands, October 2026 evaluation Effort: High Configuration: OpenHands harness 69.0% vals.ai for Grok 4.5 (high) 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 Grok 4.5 on Vibe Code Bench 1.1 — OpenHands, October 2026 evaluation τ³-bench τ³ — Banking, AllTools retrieval, v1.0.1 grading Effort: High Configuration: AllTools retrieval 47.9% sierra-tau-bench-public.s3.us-west-2.amazonaws.com for Grok 4.5 (high) 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 August 4, 2026 Evaluated July 24, 2026 Benchmark leaderboard Sierra Independent Sierra Research Record for Grok 4.5 on τ³-bench τ³ — Banking, AllTools retrieval, v1.0.1 grading