Head to head
Anthropic: Claude Sonnet 5 vs DeepSeek: DeepSeek V4.1 Flash
Live prices, context windows, capabilities, and measured quality — updated continuously.
Side by side
| Metric | Anthropic: Claude Sonnet 5 Anthropic | DeepSeek: DeepSeek V4.1 Flash Deepseek |
|---|---|---|
| Input $/M tokens | $2.00 | $0.150 |
| Output $/M tokens | $10.00 | $0.600 |
| Context window | 1.0M | 1.0M |
| Max output | 128K | 384K |
| WM Score | 83 | 81 |
| Benchmark quality | 78.4 | 72 |
| Hosts serving it | 5 | 7 |
| Throughput (tok/s) | 64 | 133 |
| Latency (ms) | 1645 | 953 |
| Vision | ||
| Tools | ||
| Reasoning | ||
| JSON mode |
Which should you pick?
DeepSeek: DeepSeek V4.1 Flash costs less per million input tokens — about 13.3× cheaper than Anthropic: Claude Sonnet 5. Anthropic: Claude Sonnet 5 scores higher on measured quality. DeepSeek: DeepSeek V4.1 Flash takes a larger context window, which matters for long documents or big codebases. Prices here are live list prices; the same model can cost less on a different host, so check the model page for the cheapest offering.