Claude Opus 5.5 Max
| Released | 2026-09-22 |
|---|---|
| Price per 1M | $4.00 in · $20.00 out |
| Overall score | 65.7 · rank 16 |
| Context window | 1,000,000 tokens |
| Provider | Anthropic |
| Weights | Proprietary |
| Configuration | Max |
Scores
| Dimension | Score | Rank | Benchmarks |
|---|---|---|---|
| Overall: Balanced | 65.7 | 16 | 33 |
| Overall: Coding | 65.7 | 16 | 27 |
| Overall: Reasoning | 66.5 | 22 | 14 |
| Overall: Agentic work | 65.0 | 18 | 25 |
| Overall: Frontend | 64.6 | 18 | 10 |
| Coding | 66.8 | 15 | 8 |
| Agents | 63.9 | 12 | 9 |
| Reasoning | 66.7 | 26 | 8 |
| Math | 67.4 | 10 | 4 |
| Knowledge | 64.5 | 8 | 2 |
| Frontend | 63.5 | 10 | 2 |
| Value vs price | +9.5 | 50 |
Buzz
| Posts on X | About 3,523 a day |
|---|---|
| Mood | 50% positive, 10% negative |
| Hacker News | 518 mentions this week |
| Checked | 2026-11-11 |
- Which model has the best overall intelligence? - Gemini 4 Carbon - Fable 5.2 - Opus 5.5 - GPT-6.2 Sol - GPT-6 Astra
- THE 10 BEST CODING IDES IN THE AGE OF CODEX AND CLAUDE CODE A coding IDE is no longer only a place you type. OpenAI Codex and Anthropic's Claude Code run as terminal agents that read a repo, edit files, run tests and open pull requests. The editor's job is to host those agents…
- Grok bot really needs a smarter model. It's so far behind Opus 5.5, Duet will crush it if it's anywhere near grok bot as a harness.
Evidence
Coding 66.8 ±1.9
| Benchmark | Result | Source | Date |
|---|---|---|---|
| CursorBench | 57.8% | Epoch AI | 2026-11-11 |
| FrontierSWE | 62.3% | Epoch AI | 2026-11-11 |
| Code Migration v1.1 | 81.0% | Vals AI | 2026-11-09 |
| MirrorCode | 95.6% | Epoch AI | 2026-10-30 |
| IOI | 95.1% | Vals AI | 2026-10-29 |
| SWE-bench Multimodal | 70.2% | Vals AI | 2026-11-09 |
| SciCode | 66.9% | Epoch AI | 2026-11-11 |
| ProgramBench | 18.5% | Vals AI | 2026-11-09 |
Agents 63.9 ±0.8
| Benchmark | Result | Source | Date |
|---|---|---|---|
| Terminal-Bench 4 | 65.8% | Terminal-Bench | 2026-09-22 |
| SRE Bench | 33.6% | Vals AI | 2026-11-05 |
| Terminal-Bench-Science | 47.1% | Vals AI | 2026-11-09 |
| APEX-Agents | 73.5% | Epoch AI | 2026-11-11 |
| Terminal-Bench 4.0 (Vals run) | 65.2% | Vals AI | 2026-11-09 |
| EMB v1.1 (Excel financial modeling) | 75.8% | Vals AI | 2026-11-09 |
| Tax Agent Bench | 44.5% | Vals AI | 2026-11-09 |
| Finance Agent v2.1 | 67.8% | Vals AI | 2026-11-09 |
| HLAB-Vals 1.1 (legal agent) | 9.2% | Vals AI | 2026-11-09 |
| CyberBench v1.1 | 55.4% | Vals AI | 2026-11-05 |
Reasoning 66.7 ±1.9
| Benchmark | Result | Source | Date |
|---|---|---|---|
| ARC-AGI-2 | 91.7% | Epoch AI | 2026-11-11 |
| MysteryMechanism | 49.6% | Vals AI | 2026-11-09 |
| ARC-AGI-2 (ARC Prize verified) | 91.7% | ARC Prize | 2026-11-11 |
| GPQA Diamond | 90.6% | Epoch AI | 2026-09-22 |
| CritPt | 31.7% | Epoch AI | 2026-11-11 |
| ARC-AGI-1 (ARC Prize verified) | 97.5% | ARC Prize | 2026-11-11 |
| ARC-AGI-1 | 97.5% | Epoch AI | 2026-11-11 |
| BioMysteryBench | 79.3% | Vals AI | 2026-11-09 |
| Chess Puzzles | 67.0% | Epoch AI | 2026-10-13 |
| Mystery Game Puzzles | 71.0% | Epoch AI | 2026-09-29 |
Math 67.4 ±1.3
| Benchmark | Result | Source | Date |
|---|---|---|---|
| FrontierMath Tiers 1-3 | 91.2% | Epoch AI | 2026-09-22 |
| FrontierMath Tier 4 | 95.0% | Epoch AI | 2026-09-22 |
| OTIS Mock AIME 2024-2025 | 100.0% | Epoch AI | 2026-09-22 |
| ProofBench v1.1 | 100.0% | Vals AI | 2026-11-09 |
| ProofBench | 100.0% | Epoch AI | 2026-11-11 |
Knowledge 64.5 ±2.7
| Benchmark | Result | Source | Date |
|---|---|---|---|
| SimpleQA Verified | 72.2% | Epoch AI | 2026-09-22 |
| Legal Research Bench | 50.5% | Vals AI | 2026-11-09 |
Frontend 63.5 ±0.7
| Benchmark | Result | Source | Date |
|---|---|---|---|
| Vibe Code Bench v1.1 | 90.3% | Vals AI | 2026-11-09 |
| LMArena WebDev | 1,818 | LMArena | 2026-11-09 |
Results not used in the score
| Benchmark | Result | Source | Why not used |
|---|---|---|---|
| LMArena WebDev | 1,814 | LMArena | Lower duplicate run on the same benchmark |
Names matched to this model
claude-opus-5-5-max