CursorBench 4.0 Effort: Low 30.9% cursor.com for Claude Haiku 5.5 (low) on CursorBench 4.0 (opens in a new tab) Archived copy (opens in a new tab) CursorBench Accuracy Reported October 8, 2026 Benchmark leaderboard Cursor Independent Record for Claude Haiku 5.5 on CursorBench 4.0 CursorBench 4.0 Effort: Medium 36.9% cursor.com for Claude Haiku 5.5 (medium) on CursorBench 4.0 (opens in a new tab) Archived copy (opens in a new tab) CursorBench Accuracy Reported October 8, 2026 Benchmark leaderboard Cursor Independent Record for Claude Haiku 5.5 on CursorBench 4.0 CursorBench 4.0 Effort: High 42.3% cursor.com for Claude Haiku 5.5 (high) on CursorBench 4.0 (opens in a new tab) Archived copy (opens in a new tab) CursorBench Accuracy Reported October 8, 2026 Benchmark leaderboard Cursor Independent Record for Claude Haiku 5.5 on CursorBench 4.0 CursorBench 4.0 Effort: xHigh 44.3% cursor.com for Claude Haiku 5.5 (xhigh) on CursorBench 4.0 (opens in a new tab) Archived copy (opens in a new tab) CursorBench Accuracy Reported October 8, 2026 Benchmark leaderboard Cursor Independent Record for Claude Haiku 5.5 on CursorBench 4.0 CursorBench 4.0 Effort: Max 48.4% cursor.com for Claude Haiku 5.5 (max) on CursorBench 4.0 (opens in a new tab) Archived copy (opens in a new tab) CursorBench Accuracy Reported October 8, 2026 Benchmark leaderboard Cursor Independent Record for Claude Haiku 5.5 on CursorBench 4.0 FrontierSWE 2 — October 2026 evaluation Configuration: Proximus harness, 5 trials, 20-hour budget 43.8% frontierswe.com for Claude Haiku 5.5 on FrontierSWE 2 — October 2026 evaluation (opens in a new tab) Archived copy (opens in a new tab) FrontierSWE Score Reported October 8, 2026 Benchmark leaderboard Proximal Independent Record for Claude Haiku 5.5 on FrontierSWE 2 — October 2026 evaluation Global MMLU Original Effort: Max 87.8% anthropic.com for Claude Haiku 5.5 (max) on Global MMLU Original (opens in a new tab) Archived copy (opens in a new tab) Average accuracy Reported October 7, 2026 System card Anthropic Self-reported Record for Claude Haiku 5.5 on Global MMLU Original Humanity's Last Exam Full set — No tools Effort: Max Configuration: No tools 45.9% anthropic.com for Claude Haiku 5.5 (max) on Humanity's Last Exam Full set — No tools (opens in a new tab) Archived copy (opens in a new tab) Humanity's Last Exam Accuracy Reported October 7, 2026 System card Anthropic Self-reported Record for Claude Haiku 5.5 on Humanity's Last Exam Full set — No tools Humanity's Last Exam Full set — With tools Effort: Max Configuration: With tools 57.4% anthropic.com for Claude Haiku 5.5 (max) on Humanity's Last Exam Full set — With tools (opens in a new tab) Archived copy (opens in a new tab) Humanity's Last Exam Accuracy Reported October 7, 2026 System card Anthropic Self-reported Record for Claude Haiku 5.5 on Humanity's Last Exam Full set — With tools MILU Original Effort: Max 87.6% anthropic.com for Claude Haiku 5.5 (max) on Multi-task Indic Language Understanding Benchmark Original (opens in a new tab) Archived copy (opens in a new tab) Average accuracy Reported October 7, 2026 System card Anthropic Self-reported Record for Claude Haiku 5.5 on Multi-task Indic Language Understanding Benchmark Original SpatialBench Verified Effort: Max 67.7% anthropic.com for Claude Haiku 5.5 (max) on SpatialBench Verified (opens in a new tab) Archived copy (opens in a new tab) Task-pass accuracy Reported October 7, 2026 System card Anthropic Self-reported Record for Claude Haiku 5.5 on SpatialBench Verified SWE-bench Multilingual Effort: Max 83.7% anthropic.com for Claude Haiku 5.5 (max) on SWE-bench Multilingual (opens in a new tab) Archived copy (opens in a new tab) Resolved Tasks Reported October 7, 2026 System card Anthropic Self-reported Record for Claude Haiku 5.5 on SWE-bench Multilingual SWE-bench Pro Public Effort: Max 64.8% anthropic.com for Claude Haiku 5.5 (max) on SWE-bench Pro Public (opens in a new tab) Archived copy (opens in a new tab) Public tasks resolved Reported October 7, 2026 System card Anthropic Self-reported Record for Claude Haiku 5.5 on SWE-bench Pro Public Terminal-Bench 4.0 Effort: Max 39.2% anthropic.com for Claude Haiku 5.5 (max) on Terminal-Bench 4.0 (opens in a new tab) Archived copy (opens in a new tab) Terminal-Bench Accuracy Reported October 7, 2026 System card Anthropic Self-reported Record for Claude Haiku 5.5 on Terminal-Bench 4.0 Terminal-Bench Science 0.1 Effort: Max 20.6% anthropic.com for Claude Haiku 5.5 (max) on Terminal-Bench Science 0.1 (opens in a new tab) Archived copy (opens in a new tab) Terminal-Bench Accuracy Reported October 7, 2026 System card Anthropic Self-reported Record for Claude Haiku 5.5 on Terminal-Bench Science 0.1