Claude Sonnet 5.5 vs Kimi K2.5
anthropic/claude-sonnet-5.5 · moonshotai/kimi-k2.5
As of November 1, 2026, Kimi K2.5 is the cheaper API on UberLLM: $0.0041 per million input tokens and $0.0205 per million output, versus $0.1039 / $0.5197 for Claude Sonnet 5.5, about 96% 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 Kimi K2.5 to cut cost; choose Claude Sonnet 5.5 when context size wins. Claude Sonnet 5.5 carries the larger context window (1,000,000 vs 256,000 tokens), which can matter for long-document work.
Claude Sonnet 5.5 vs Kimi K2.5, side by side
| Spec | Claude Sonnet 5.5 | Kimi K2.5 |
|---|---|---|
| Price · input / 1M | $0.1039 | $0.0041 |
| Price · output / 1M | $0.5197 | $0.0205 |
| Context length | 1,000,000 | 256,000 |
| Max output tokens | 128,000 | 65,536 |
| Input modalities | text, image, file | text, image |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | Yes |
| Reasoning | Yes | Yes |
| % off list | 94.8% off | 99.2% off |
| First token, median (7 days) | 2.9 s (173 requests) | — |
Best prices on UberLLM right now. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated November 1, 2026. A price more than 70% below list is what buyers were billed, not an error. Why so cheap?
Claude Sonnet 5.5 vs Kimi K2.5 — FAQ
Is Claude Sonnet 5.5 or Kimi K2.5 cheaper?
Kimi K2.5 is cheaper on a blended token mix, by about 96%. 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 Kimi K2.5?
Claude Sonnet 5.5: $0.1039 in / $0.5197 out per 1M tokens. Kimi K2.5: $0.0041 in / $0.0205 out per 1M tokens. That's roughly a 96% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Claude Sonnet 5.5 and Kimi K2.5 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.