Claude Opus 5.5 vs Mistral Small 4
anthropic/claude-opus-5.5 · mistralai/mistral-small-4
As of October 31, 2026, Mistral Small 4 is the cheaper API on UberLLM: $0.0938 per million input tokens and $0.3750 per million output, versus $1.59 / $7.95 for Claude Opus 5.5, about 95% 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 Mistral Small 4 to cut cost; choose Claude Opus 5.5 when context size wins. Claude Opus 5.5 carries the larger context window (1,000,000 vs 256,000 tokens), which can matter for long-document work.
Claude Opus 5.5 vs Mistral Small 4, side by side
| Spec | Claude Opus 5.5 | Mistral Small 4 |
|---|---|---|
| Price · input / 1M | $1.59 | $0.0938 |
| Price · output / 1M | $7.95 | $0.3750 |
| Context length | 1,000,000 | 256,000 |
| Max output tokens | 128,000 | 32,768 |
| 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 | 60% off | 38% off |
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.
Claude Opus 5.5 vs Mistral Small 4 — FAQ
Is Claude Opus 5.5 or Mistral Small 4 cheaper?
Mistral Small 4 is cheaper on a blended token mix, by about 95%. 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 Mistral Small 4?
Claude Opus 5.5: $1.59 in / $7.95 out per 1M tokens. Mistral Small 4: $0.0938 in / $0.3750 out per 1M tokens. That's roughly a 95% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Claude Opus 5.5 and Mistral Small 4 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.