Claude Sonnet 5 vs DeepSeek V4 Flash 0731 Fast
anthropic/claude-sonnet-5 · deepseek/deepseek-v4-flash-0731-fast
As of November 4, 2026, Claude Sonnet 5 is the cheaper API on UberLLM: $0.1043 per million input tokens and $0.5214 per million output, versus $0.2660 / $0.5320 for DeepSeek V4 Flash 0731 Fast, about 10% less when output is 3 tokens for every input token. These are the best prices on the market right now. Both work with one OpenAI-compatible key and UberLLM adds no fee. Choose Claude Sonnet 5 to cut cost; choose DeepSeek V4 Flash 0731 Fast when its capabilities fit your task better.
Claude Sonnet 5 vs DeepSeek V4 Flash 0731 Fast, side by side
| Spec | Claude Sonnet 5 | DeepSeek V4 Flash 0731 Fast |
|---|---|---|
| Price · input / 1M | $0.1043 | $0.2660 |
| Price · output / 1M | $0.5214 | $0.5320 |
| Context length | 1,000,000 | 1,000,000 |
| Max output tokens | 64,000 | 32,768 |
| Input modalities | text, image | text |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | — |
| Reasoning | Yes | Yes |
| % off list | 94.8% off | 24% off |
| First token, median (7 days) | 3.2 s (3,417 requests) | 2.5 s (469 requests) |
Best prices on UberLLM right now. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated November 4, 2026. A price more than 70% below list is what buyers were billed, not an error. Why so cheap?
Claude Sonnet 5 vs DeepSeek V4 Flash 0731 Fast — FAQ
Is Claude Sonnet 5 or DeepSeek V4 Flash 0731 Fast cheaper?
Claude Sonnet 5 is cheaper on a blended token mix, by about 10%. A request costs what its provider charged, UberLLM adds no fee, and every request is listed with its cost in Activity.
What's the price difference between Claude Sonnet 5 and DeepSeek V4 Flash 0731 Fast?
Claude Sonnet 5: $0.1043 in / $0.5214 out per 1M tokens. DeepSeek V4 Flash 0731 Fast: $0.2660 in / $0.5320 out per 1M tokens. That's roughly a 10% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Claude Sonnet 5 and DeepSeek V4 Flash 0731 Fast with one API?
Yes. Both are served through a single OpenAI-compatible endpoint — set the base URL to https://api.uberllm.dev/v1 and your UberLLM key, then switch between them by changing the model id. Anthropic SDKs work via https://api.uberllm.dev/v1/messages.