Model comparison
Claude 3.5 Sonnet vs Claude Haiku 5.5
Claude Haiku 5.5 is the stronger model overall, scoring 49.5 to 34.6 on the Noometry Index.
Last verified . 2 shared benchmarks.
Summary
- They share 2 benchmarks with published results for both. Claude 3.5 Sonnet scores higher in 0 categories and Claude Haiku 5.5 in 5 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Haiku 5.5 leads 73.6 to 19.2.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 8.5% for Claude 3.5 Sonnet and 98.9% for Claude Haiku 5.5.
Side by side
| Claude 3.5 Sonnet | Claude Haiku 5.5 | |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Noometry Index | 34.6 | 49.5 |
| Released | 2024-06-20 | 2026-10-07 |
| Weights | Proprietary | Proprietary |
| Context window | — | 1M |
| Max output | — | 128K |
| Input $ / M tokens | — | $0.10 |
| Output $ / M tokens | — | $0.50 |
| Results tracked | 60 | 9 |
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Category by category
Coding Claude Haiku 5.5 leads
Claude 3.5 Sonnet: 39.0 (#165), Claude Haiku 5.5: 49.2 (#50)
| Benchmark | Claude 3.5 Sonnet | Claude Haiku 5.5 |
|---|---|---|
| Aider Polyglot | 51.6% | — |
| LMArena WebDev | — | 1587 |
| GSO | 4.6% | — |
| WeirdML | 40% | — |
| BigCodeBench Instruct | 46.8% | — |
| LiveBench Coding | 67.1% | — |
| LMArena Coding | 1342 | — |
| BigCodeBench Complete | 58.6% | — |
| CadEval | 48% | — |
| HumanEval+ | 81.7% | — |
| MBPP+ | 74.3% | — |
Agentic & Tool Use Not comparable
Claude 3.5 Sonnet: 32.3 (#67), Claude Haiku 5.5: —
| Benchmark | Claude 3.5 Sonnet | Claude Haiku 5.5 |
|---|---|---|
| TheAgentCompany | 24% | — |
| Cybench | 17.5% | — |
| BALROG | 32.6% | — |
| METR Time Horizons | 45.2% | — |
Reasoning Claude Haiku 5.5 leads
Claude 3.5 Sonnet: 23.1 (#183), Claude Haiku 5.5: 35.2 (#69)
| Benchmark | Claude 3.5 Sonnet | Claude Haiku 5.5 |
|---|---|---|
| SimpleBench | 41.4% | — |
| NYT Connections (extended) | — | 65.7% |
| EnigmaEval | 0.9% | — |
| LiveBench Reasoning | 56.7% | — |
| LMArena Hard Prompts | 1305 | — |
| Mystery Game Puzzles | — | 30% |
| DTBench | 67.8% | — |
| LiveBench Data Analysis | 55% | — |
| Epoch Capabilities Index | 133.55 | — |
| ForecastBench | 60.7 | — |
| LiveBench | 59% | — |
Math Claude Haiku 5.5 leads
Claude 3.5 Sonnet: 19.2 (#288), Claude Haiku 5.5: 73.6 (#18)
| Benchmark | Claude 3.5 Sonnet | Claude Haiku 5.5 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 8.5% | 98.9% |
| FrontierMath (Tiers 1-3) | — | 75.1% |
| FrontierMath Tier 4 | — | 46.3% |
| Omni-MATH | 27.6% | — |
| LiveBench Math | 52.3% | — |
| LMArena Math | 1307 | — |
| MATH Level 5 | 56.9% | — |
| FrontierMath (Feb 2025 set) | 2.1% | — |
| FrontierMath Tier 4 (v1) | 0% | — |
Knowledge Claude Haiku 5.5 leads
Claude 3.5 Sonnet: 28.6 (#245), Claude Haiku 5.5: 50.8 (#70)
| Benchmark | Claude 3.5 Sonnet | Claude Haiku 5.5 |
|---|---|---|
| GPQA Diamond | 55.3% | 89.6% |
| Humanity's Last Exam | 4.1% | — |
| SimpleQA Verified | — | 23.8% |
| MMLU-Pro | 77.7% | — |
| Confabulations | 19.9% | — |
| GPQA (HELM) | 56.5% | — |
| LMArena Expert | 1265 | — |
| MMLU | 87.3% | — |
Multimodal Claude Haiku 5.5 leads
Claude 3.5 Sonnet: 26.5 (#120), Claude Haiku 5.5: 43.7 (#21)
| Benchmark | Claude 3.5 Sonnet | Claude Haiku 5.5 |
|---|---|---|
| LMArena Vision | 1125 | — |
| Video-MME | 60% | — |
| GeoBench | 62% | — |
| VPCT | 33% | — |
| Furniture Assembly | — | 47.5% |
Multilingual Not comparable
Claude 3.5 Sonnet: 43.2 (#185), Claude Haiku 5.5: —
| Benchmark | Claude 3.5 Sonnet | Claude Haiku 5.5 |
|---|---|---|
| LMArena Non-English | 1283 | — |
| LMArena Chinese | 1272 | — |
| LMArena French | 1305 | — |
| LMArena German | 1297 | — |
| LMArena Japanese | 1234 | — |
| LMArena Korean | 1200 | — |
| LMArena Russian | 1306 | — |
| LMArena Spanish | 1290 | — |
Instruction Following Not comparable
Claude 3.5 Sonnet: 68.8 (#182), Claude Haiku 5.5: —
| Benchmark | Claude 3.5 Sonnet | Claude Haiku 5.5 |
|---|---|---|
| LiveBench Instruction Following | 69.3% | — |
| IFEval | 85.5% | — |
| LMArena Instruction Following | 1297 | — |
Long Context Not comparable
Claude 3.5 Sonnet: 39.9 (#167), Claude Haiku 5.5: —
| Benchmark | Claude 3.5 Sonnet | Claude Haiku 5.5 |
|---|---|---|
| LMArena Longer Query | 1311 | — |
Writing & Preference Not comparable
Claude 3.5 Sonnet: 52.9 (#164), Claude Haiku 5.5: —
| Benchmark | Claude 3.5 Sonnet | Claude Haiku 5.5 |
|---|---|---|
| LMArena Text | 1298 | — |
| LMArena Creative Writing | 1292 | — |
| Short-Story Creative Writing | 80.3% | — |
| EQ-Bench Creative Writing | 1451 | — |
| WildBench | 79.2% | — |
| LMArena Multi-Turn | 1326 | — |
| LiveBench Language | 53.8% | — |
Frequently asked questions
Is Claude 3.5 Sonnet better than Claude Haiku 5.5?
Claude Haiku 5.5 is the stronger model overall, scoring 49.5 to 34.6 on the Noometry Index.
Is Claude 3.5 Sonnet or Claude Haiku 5.5 better for coding?
Claude Haiku 5.5 scores higher on coding benchmarks: 49.2 versus 39.0 in the Noometry coding category.
How many benchmarks do Claude 3.5 Sonnet and Claude Haiku 5.5 share?
2 benchmarks have published results for both models. Claude 3.5 Sonnet has 60 scored results on Noometry and Claude Haiku 5.5 has 9.