Claude Opus 5.5 vs DeepSeek V4 Flash 0731 Fast
anthropic/claude-opus-5.5 · deepseek/deepseek-v4-flash-0731-fast
As of November 4, 2026, DeepSeek V4 Flash 0731 Fast is the cheaper API on UberLLM: $0.2660 per million input tokens and $0.5320 per million output, versus $0.1484 / $0.7419 for Claude Opus 5.5, about 22% 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 DeepSeek V4 Flash 0731 Fast to cut cost; choose Claude Opus 5.5 when its capabilities fit your task better.
Claude Opus 5.5 vs DeepSeek V4 Flash 0731 Fast, side by side
| Spec | Claude Opus 5.5 | DeepSeek V4 Flash 0731 Fast |
|---|---|---|
| Price · input / 1M | $0.1484 | $0.2660 |
| Price · output / 1M | $0.7419 | $0.5320 |
| Context length | 1,000,000 | 1,000,000 |
| Max output tokens | 128,000 | 32,768 |
| Input modalities | text, image, file | text |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | — |
| Reasoning | Yes | Yes |
| % off list | 96.3% off | 24% off |
| First token, median (7 days) | 5.2 s (133 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 Opus 5.5 vs DeepSeek V4 Flash 0731 Fast — FAQ
Is Claude Opus 5.5 or DeepSeek V4 Flash 0731 Fast cheaper?
DeepSeek V4 Flash 0731 Fast is cheaper on a blended token mix, by about 22%. 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 Opus 5.5 and DeepSeek V4 Flash 0731 Fast?
Claude Opus 5.5: $0.1484 in / $0.7419 out per 1M tokens. DeepSeek V4 Flash 0731 Fast: $0.2660 in / $0.5320 out per 1M tokens. That's roughly a 22% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Claude Opus 5.5 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.