Claude Sonnet 4 vs Claude 4 Sonnet
Claude 4 Sonnet is cheaper on output tokens. Choose Claude Sonnet 4 or Claude 4 Sonnet based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | Claude Sonnet 4 | Claude 4 Sonnet |
|---|---|---|
| Provider | Anthropic | NanoGPT |
| Input / 1M tokens | $3.00 | $2.99 |
| Output / 1M tokens | $15.00 | $14.99 |
| Context window | 200K | 200K |
| Parameters | — | — |
| Open weights | No | No |
| Released | May 2025 | Sep 2025 |
| SWE-bench Verified score | 76.8 | 76.4 |
| Aider Polyglot score | 61.3 | — |
| LMArena (Chatbot Arena) Elo score | 1351 | — |
| LMArena Vision Elo score | 1191 | — |
| GPQA Diamond score | 78.3 | — |
| FrontierMath score | 4.1 | — |
| Epoch Capabilities Index score | 142 | — |
| LiveBench score | — | 60.6 |
| SWE-bench Multimodal score | — | 35.6 |
FAQ
Is Claude Sonnet 4 or Claude 4 Sonnet cheaper?
Claude 4 Sonnet is cheaper on output tokens ($14.99 vs $15.00 per 1M).
Which has the larger context window, Claude Sonnet 4 or Claude 4 Sonnet?
Both models offer a similar context window.
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.