Claude Sonnet 5 vs DeepSeek V4.1 Flash
anthropic/claude-sonnet-5 · deepseek/deepseek-v4.1-flash
As of October 25, 2026, DeepSeek V4.1 Flash is the cheaper API on UberLLM: $0.0041 per million input tokens and $0.2040 per million output, versus $0.1500 / $0.7500 for Claude Sonnet 5 — about 74% less on a blended 3:1 token mix. Both are reached through one OpenAI-compatible key and routed to the cheapest healthy seller, with no UberLLM fee added, so the price you see is the price you pay. Choose DeepSeek V4.1 Flash to cut cost; choose Claude Sonnet 5 when its capabilities fit your task better.
Claude Sonnet 5 vs DeepSeek V4.1 Flash, side by side
| Spec | Claude Sonnet 5 | DeepSeek V4.1 Flash |
|---|---|---|
| Price · input / 1M | $0.1500 | $0.0041 |
| Price · output / 1M | $0.7500 | $0.2040 |
| Context length | 1,000,000 | 1,048,576 |
| Max output tokens | 64,000 | 384,000 |
| Input modalities | text | text, image |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | — | Yes |
| Reasoning | Yes | Yes |
| Cheapest seller | UberLLM | UberLLM |
| % off list | 93% off | 80% off |
Live prices via UberLLM, routed to the cheapest healthy seller. The price shown has no UberLLM fee added. Updated October 25, 2026.
Claude Sonnet 5 vs DeepSeek V4.1 Flash — FAQ
Is Claude Sonnet 5 or DeepSeek V4.1 Flash cheaper?
DeepSeek V4.1 Flash is cheaper on a blended token mix, by about 74%. UberLLM routes every request to the cheapest healthy seller and bills the price shown, with no fee added.
What's the price difference between Claude Sonnet 5 and DeepSeek V4.1 Flash?
Claude Sonnet 5: $0.1500 in / $0.7500 out per 1M tokens. DeepSeek V4.1 Flash: $0.0041 in / $0.2040 out per 1M tokens. That's roughly a 74% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Claude Sonnet 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.