Claude Sonnet 5.5 vs DeepSeek V4 Pro
anthropic/claude-sonnet-5.5 · deepseek/deepseek-v4-pro
As of October 31, 2026, DeepSeek V4 Pro is the cheaper API on UberLLM: $0.3016 per million input tokens and $0.6032 per million output, versus $0.7610 / $3.80 for Claude Sonnet 5.5, about 83% less when output is 3 tokens for every input token. These are the median prices buyers paid over the last 24 hours. Both work with one OpenAI-compatible key and UberLLM adds no fee. Choose DeepSeek V4 Pro to cut cost; choose Claude Sonnet 5.5 when its capabilities fit your task better.
Claude Sonnet 5.5 vs DeepSeek V4 Pro, side by side
| Spec | Claude Sonnet 5.5 | DeepSeek V4 Pro |
|---|---|---|
| Price · input / 1M | $0.7610 | $0.3016 |
| Price · output / 1M | $3.80 | $0.6032 |
| Context length | 1,000,000 | 1,000,000 |
| Max output tokens | 128,000 | 128,000 |
| Input modalities | text, image, file | text |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | — |
| Reasoning | Yes | Yes |
| % off list | 62% off | 81% off |
| First token, median (7 days) | 2.9 s (134 requests) | 5.4 s (200 requests) |
Median prices buyers paid on UberLLM over the last 24 hours. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated October 31, 2026. A price more than 70% below list is what buyers were billed, not an error. Why so cheap?
Claude Sonnet 5.5 vs DeepSeek V4 Pro — FAQ
Is Claude Sonnet 5.5 or DeepSeek V4 Pro cheaper?
DeepSeek V4 Pro is cheaper on a blended token mix, by about 83%. 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 5.5 and DeepSeek V4 Pro?
Claude Sonnet 5.5: $0.7610 in / $3.80 out per 1M tokens. DeepSeek V4 Pro: $0.3016 in / $0.6032 out per 1M tokens. That's roughly a 83% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Claude Sonnet 5.5 and DeepSeek V4 Pro 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.