AI models / Compare
DeepSeek V4 Pro vs Claude Sonnet 5.5
DeepSeek V4 Pro: DeepSeek's larger API model, with thinking and non-thinking modes and OpenAI- and Anthropic-format APIs. Claude Sonnet 5.5: Anthropic's balance of speed and intelligence.
| Spec | DeepSeek V4 Pro | Claude Sonnet 5.5 |
|---|---|---|
| Provider | DeepSeek | Anthropic |
| API model ID | deepseek-v4-pro | claude-sonnet-5-5 |
| API price (standard) | $1.32 in / $3.96 out per 1M tokens | $2.00 in / $10.00 out per 1M tokens |
| Pricing note | Peak-hour, cache-miss price; off-peak is half ($0.66 / $1.98). | Batch API is 50% off. |
| Context window | 1M tokens | 1M tokens |
| Max output | 384K tokens | 128K tokens |
| Weights | Not stated | Closed (API only) |
Figures from each provider's official docs, checked 2026-10-15. Benchmarks and real-world quality vary by task, so test both on your own prompts.