Mistral Small 4 vs GPT-5.3 Codex
mistralai/mistral-small-4 · openai/gpt-5.3-codex
As of November 2, 2026, Mistral Small 4 is the cheaper API on UberLLM: $0.0469 per million input tokens and $0.1875 per million output, versus $0.0959 / $0.7673 for GPT-5.3 Codex, about 75% 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 Mistral Small 4 to cut cost; choose GPT-5.3 Codex when context size wins. GPT-5.3 Codex carries the larger context window (400,000 vs 256,000 tokens), which can matter for long-document work.
Mistral Small 4 vs GPT-5.3 Codex, side by side
| Spec | Mistral Small 4 | GPT-5.3 Codex |
|---|---|---|
| Price · input / 1M | $0.0469 | $0.0959 |
| Price · output / 1M | $0.1875 | $0.7673 |
| Context length | 256,000 | 400,000 |
| Max output tokens | 32,768 | 128,000 |
| Input modalities | text, image | text, image |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | Yes |
| Reasoning | Yes | Yes |
| % off list | 68.8% off | 94.5% off |
Best prices on UberLLM right now. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated November 2, 2026. A price more than 70% below list is what buyers were billed, not an error. Why so cheap?
Mistral Small 4 vs GPT-5.3 Codex — FAQ
Is Mistral Small 4 or GPT-5.3 Codex cheaper?
Mistral Small 4 is cheaper on a blended token mix, by about 75%. 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 Mistral Small 4 and GPT-5.3 Codex?
Mistral Small 4: $0.0469 in / $0.1875 out per 1M tokens. GPT-5.3 Codex: $0.0959 in / $0.7673 out per 1M tokens. That's roughly a 75% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Mistral Small 4 and GPT-5.3 Codex 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.