Claude Haiku 5.5 vs Claude Opus 5
Claude Haiku 5.5 Verdict
- Claude Opus 5 (high) leads on quality: 68.3 vs 61.3.
- Claude Opus 5 (high) is stronger in coding, composite, knowledge, long context, maths, reasoning, agents & tools, human preference, multimodal.
- Claude Haiku 5.5 (high) is 50× cheaper ($0.200 vs $10.00 per 1M blended).
- Claude Haiku 5.5 (high) streams 3.2× faster (174 vs 54 tokens per second).
| Metric | Claude Haiku 5.5 (high) | Claude Opus 5 (high) |
|---|---|---|
| BenchLeader Index | 61.3 | 68.3 |
| Coding score | 62.6 | 69.2 |
| Composite score | 72.4 | 84.1 |
| Knowledge score | 64.3 | 76.9 |
| Long context score | 63.8 | 64.7 |
| Maths score | 66.2 | 71.1 |
| Reasoning score | 72.1 | 72.7 |
| Agents & tools score | – | 65.1 |
| Human preference score | – | 68.9 |
| Multimodal score | – | 66.4 |
| Blended price $/M | $0.200 | $10.00 |
| Output speed | 174 tok/s | 54 tok/s |
| Time to first answer | 22.6 s | 20.4 s |
| Context window | 1M | 1M |
| OTIS Mock AIME | 97.2% | – |
| Terminal-Bench | – | 50.3% |
| OSWorld-Verified 2.0 | – | 29.0% |
| SciCode | – | 54.3% |
| WeirdML | – | 91.6% |
| LMArena Text | – | 1490 |
| LMArena Hard Prompts | – | 1515 |
| LMArena Coding | – | 1534 |
| LMArena WebDev | 1587 | 1657 |
| LMArena Vision | – | 1319 |
| LMArena Agent | – | 8 |
| AA Intelligence Index v4.3.2 | 37.8 | 48.1 |
| AA-LCR | 77.3% | 79.0% |
| MMMU-Pro | – | 82.4% |
| AA-Omniscience | 5.8 | 33.7 |
| GPQA Diamond (AA) | – | 93.7% |
| Humanity's Last Exam (AA) | 37.3% | 52.8% |
| SciCode (AA) | 48.7% | 55.4% |
| ARC-AGI-1 | – | 97.5% |
| ARC-AGI-2 | – | 88.3% |
| ARC-AGI-3 | – | 30.2% |
| CritPt | 18.6% | 28.3% |
| GDPval-AA v2.1 | 45.9% | 54.7% |
| τ³-Banking (AA) | – | 44.7% |
| LMArena Maths | – | 1521 |
| LMArena Creative Writing | – | 1471 |
| LMArena Instruction Following | – | 1497 |
| LMArena Multi-turn | – | 1484 |
| LMArena Longer Queries | – | 1504 |
| LMArena Document | – | 1490 |
| DeepSWE v1.1 | – | 72.8% |
| LMCA | – | 63.7% |
| DTBench | – | 97.9% |
| CursorBench | – | 44.7% |
| ALE-Bench | – | 2164.6 |
| Terminal-Bench 4.0 (AA) | 21.7% | 46.0% |
| Terminal-Bench 2.1 (AA) | – | 87.6% |
| AutomationBench | 33.7% | 53.6% |
| GDP.pdf | 17.2% | 19.6% |
| MLCR | – | 59.4% |
| Harvey LAB | 1.1% | – |
| AA-Omniscience: accuracy | 34.8% | 58.9% |
| AA-Omniscience: non-hallucination | 55.5% | 38.8% |
| AA-Briefcase v1.1 | 1442 | 1561 |
Data as of 2026-10-11. Best configuration of each model; every score links to its source on the model pages.
Claude Haiku 5.5 vs Claude Opus 5: questions
- Is Claude Haiku 5.5 better than Claude Opus 5?
- Claude Opus 5 (high) leads on quality: 68.3 vs 61.3. The BenchLeader Index combines every independent quality benchmark; Claude Opus 5 (high) is ahead overall as of 2026-10-11, but check the category scores for your use.
- Is Claude Haiku 5.5 better than Claude Opus 5 for coding?
- Claude Opus 5 scores higher in coding (69 vs 63 on the category index, where 50 is average).
- Which is cheaper, Claude Haiku 5.5 or Claude Opus 5?
- Claude Haiku 5.5 is cheaper: $0.200 against $10.00 per million tokens, blended at three input tokens per output token.
- Which is faster, Claude Haiku 5.5 or Claude Opus 5?
- Claude Haiku 5.5 streams faster: 174 against 54 output tokens per second.
- Which has the larger context window?
- Both accept 1M tokens of context.