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Claude Sonnet 4
Claude Sonnet 4 is a proprietary model from Anthropic. It ranks #208 of 351 on the LMArena text leaderboard with a rating of 1351.
- Developer
- Anthropic
- Released
- Jun 1, 2025
- Context window
- —
- Price in / out, per 1M tokens
- —
- Weights
- Proprietary
- Inputs
- —
- Reasoning
- —
- Tool use
- —
The rating LMArena published at each update since Jun 1, 2025. Ratings move as votes come in and new models join.
Benchmarks
| Benchmark | Score bar | Accuracy | Rank | Cost / test |
|---|---|---|---|---|
| LiveCodeBenchCoding | 59.67% | 108 / 143 | $3 / $15 | |
| MedCodeMedicine | 33.94% | 83 / 107 | $3 / $15 | |
| MedQAMedicine | 90.35% | 45 / 92 | $3 / $15 | |
| GPQA DiamondReasoning | 69.44% | 98 / 138 | $3 / $15 | |
| MMLU-ProReasoning | 79.43% | 97 / 138 | $3 / $15 | |
| AIMEReasoning | 38.54% | 71 / 96 | $3 / $15 | |
| MMMUReasoning | 72.39% | 64 / 93 | $3 / $15 |
Vals AI, as of Oct 24, 2026.
LMArena, by category
| Leaderboard | Rating | Rank | Votes |
|---|---|---|---|
| TextLMArena | 1351 | 208 / 351 | 34.1K |
| CodingLMArena | 1414 | 157 / 346 | 6.3K |
| MathLMArena | 1375 | 188 / 339 | 2K |
| Creative writingLMArena | 1345 | 174 / 349 | 4.3K |
| Instruction followingLMArena | 1376 | 164 / 351 | 8.5K |
| Hard promptsLMArena | 1372 | 186 / 351 | 15.4K |
| Multi-turnLMArena | 1376 | 180 / 349 | 5.6K |
| Long queriesLMArena | 1397 | 154 / 330 | 6.7K |
| ExpertLMArena | 1372 | 179 / 305 | 1.7K |
| Legal and governmentIndustries | 1342 | 216 / 325 | 2.6K |
| Medicine and healthcareIndustries | 1330 | 228 / 325 | 2.4K |
| Business and financeIndustries | 1318 | 225 / 344 | 6.5K |
| ChineseLanguages | 1350 | 219 / 328 | 2.4K |
| SpanishLanguages | 1357 | 189 / 249 | 835 |
| GermanLanguages | 1331 | 185 / 261 | 1.1K |
| FrenchLanguages | 1363 | 184 / 252 | 570 |
| JapaneseLanguages | 1302 | 159 / 236 | 970 |
| VisionLMArena | 1191 | 100 / 146 | 1.1K |
LMArena, CC BY 4.0, as of Oct 22, 2026. Where a model is rated at several effort levels, its best is shown (Claude Sonnet 4 (Thinking 32K, 20250514), Claude Sonnet 4 (20250514)).
Compare Claude Sonnet 4
Anthropic
An AI safety and research company that builds the Claude family of models, known for coding, long context and careful behaviour. Founded 2021, based in San Francisco. anthropic.com
Questions
Who makes Claude Sonnet 4?
Claude Sonnet 4 is made by Anthropic, founded 2021 and based in San Francisco.
How does Claude Sonnet 4 rank?
#208 of 351 on LMArena’s text leaderboard, rated 1351 (95% interval 1346–1355) from 34,135 votes, as of Oct 22, 2026.
Is Claude Sonnet 4 open source?
No. Claude Sonnet 4 is proprietary and served through its provider’s API.