DeepSeek V4 Pro vs Claude Sonnet 5.5: cost
For a typical support chatbot, DeepSeek V4 Pro is about 2.1× cheaper than Claude Sonnet 5.5 ($66.33 vs $140 per month). Price is only one factor: test both on your own prompts before switching.
| DeepSeek V4 Pro | Claude Sonnet 5.5 | |
|---|---|---|
| Input /1M | $1.32 | $2.00 |
| Output /1M | $3.96 | $10.00 |
| Cached input /1M | $0.044 | $0.20 |
| Batch input /1M | — | $1.00 |
| Batch output /1M | — | $5.00 |
| Context | 1,000,000 | 1,000,000 |
Monthly cost by workload
| Scenario (per month) | DeepSeek V4 Pro | Claude Sonnet 5.5 |
|---|---|---|
| Customer support chatbot 1,000 req/day · 1,500 in · 300 out | $66.33 | $140 |
| RAG over documents 500 req/day · 6,000 in · 400 out | $108 | $191 |
| Agent loop (10 calls/task, 200 tasks) 2,000 req/day · 8,000 in · 500 out | $324 | $655 |
| Batch summarization 10,000 req/day · 3,000 in · 200 out · batch | $1,426 | $1,200 |