Claude 3.5 Sonnet
Claude 3.5 Sonnet is an API-only (closed weights) language model from Anthropic, released June 20, 2024. On the Epoch Capabilities Index it scores 130.0, rank 157 of 256 rated models.
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Lab
Anthropic
Released
June 20, 2024
Weights
API-only (closed weights)
Parameters
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Context
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Price / M tokens
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Epoch ECI
130.0 #157
Strengths by category
ModelTape's 0–100 fit on Epoch AI benchmark results.
| Category | Score | Based on |
|---|---|---|
| Math | 13.1 | MATH level 5, OTIS Mock AIME 2024-2025, FrontierMath-2025-02-28-Private, FrontierMath-Tier-4-2025-07-01-Private |
| Knowledge | 38.8 | GPQA diamond, MMLU |
Benchmark results
| Benchmark (Epoch AI) | Score |
|---|---|
| MMLU | 82.0% |
| MATH level 5 | 51.7% |
| GPQA Diamond | 40.3% |
| SimpleBench | 13.0% |
| OTIS Mock AIME | 6.4% |
| FrontierMath-2025-02-28-Private | 1.8% |
| FrontierMath-Tier-4-2025-07-01-Private | 0.0% |
Links
Models with a similar score
Gemini 2.0 Flash (Feb 2025) · o1-preview · Gemini 2.0 Flash Thinking (Jan 2025) · Claude 3.5 Sonnet (October 2024) · Gemini 2.5 Flash-Lite (Jun 2025) · Mistral Medium 3 · Qwen3-8B · Llama 4 Maverick
More from Anthropic
Claude Fable 5.2 · Claude Haiku 5.5 · Claude Sonnet 5.5 · Claude Opus 5.5 · Claude Fable 5.1 · Claude Opus 5 · Claude Sonnet 5 · Claude Fable 5