Claude 4 Sonnet
Claude 4 Sonnet — Anthropic multimodal model with an Intelligence Index of 29, a 1M-token context window and a blended price of $1.2/1M tokens.
Key specifications
| Intelligence Index | 29 |
|---|---|
| Coding Index | 37.6 |
| Agentic Index | 16.6 |
| Arena Elo | — |
| Context window (K tokens) | 1,000 |
| Blended price ($/1M tokens) | 1.2 |
| Output speed (tokens/s) | — |
About Claude 4 Sonnet
The Claude 4 Sonnet is a multimodal model from Anthropic with an Intelligence Index of 29.0, a Coding Index of 37.6 and a 1 million-token context window. It runs at a blended price of $1.20 per million tokens. It is proprietary api. Leaderboard indices are a strong signal but only part of real-world quality, which also depends on tool use, latency and task fit.
The comparisons below show how Claude 4 Sonnet stacks up against the alternatives people most often weigh against it, with the specific numbers laid out side by side.
Frequently asked questions
Is the Claude 4 Sonnet any good?
Claude 4 Sonnet — Anthropic multimodal model with an Intelligence Index of 29, a 1M-token context window and a blended price of $1.2/1M tokens.
What are the key specs of the Claude 4 Sonnet?
See the specification table above for the full breakdown.