Claude Sonnet 5.5 vs DeepSeek V4.1 Flash
anthropic/claude-sonnet-5.5 · deepseek/deepseek-v4.1-flash
As of October 24, 2026, DeepSeek V4.1 Flash is the cheaper API on UberLLM: $0.0004 per million input tokens and $0.0009 per million output, versus $0.2336 / $1.17 for Claude Sonnet 5.5 — about 100% less on a blended 3:1 token mix. Both are reached through one OpenAI-compatible key and routed to the cheapest healthy seller, with UberLLM's 10% fee already included, so the price you see is the price you pay. Choose DeepSeek V4.1 Flash to cut cost; choose Claude Sonnet 5.5 when its capabilities fit your task better.
Claude Sonnet 5.5 vs DeepSeek V4.1 Flash, side by side
| Spec | Claude Sonnet 5.5 | DeepSeek V4.1 Flash |
|---|---|---|
| Price · input / 1M | $0.2336 | $0.0004 |
| Price · output / 1M | $1.17 | $0.0009 |
| Context length | 1,000,000 | 1,048,576 |
| Max output tokens | 128,000 | 384,000 |
| Input modalities | text, image, file | text, image |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | Yes |
| Reasoning | Yes | Yes |
| Cheapest seller | UberLLM | UberLLM |
| % off list | 89% off | 99.9% off |
Live prices via UberLLM, routed to the cheapest healthy seller. The price shown includes UberLLM’s 10% fee. Updated October 24, 2026.
Claude Sonnet 5.5 vs DeepSeek V4.1 Flash — FAQ
Is Claude Sonnet 5.5 or DeepSeek V4.1 Flash cheaper?
DeepSeek V4.1 Flash is cheaper on a blended token mix, by about 100%. UberLLM routes every request to the cheapest healthy seller and bills the price shown, with its 10% fee included.
What's the price difference between Claude Sonnet 5.5 and DeepSeek V4.1 Flash?
Claude Sonnet 5.5: $0.2336 in / $1.17 out per 1M tokens. DeepSeek V4.1 Flash: $0.0004 in / $0.0009 out per 1M tokens. That's roughly a 100% blended difference. Prices are live and include UberLLM's 10% fee.
Can I use both Claude Sonnet 5.5 and DeepSeek V4.1 Flash 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.