OpenAI: GPT-5.5 Pro vs Mistral: Mistral Medium 3.5 — pricing compared

Side-by-side API pricing for OpenAI: GPT-5.5 Pro and Mistral: Mistral Medium 3.5, normalized to $/1M tokens from the live OpenRouter feed.

Token Price Index › Browse › OpenAI: GPT-5.5 Pro vs Mistral: Mistral Medium 3.5

On blended cost, Mistral: Mistral Medium 3.5 ($3.00/M) is about 96% cheaper than OpenAI: GPT-5.5 Pro ($67.50/M) per 1M tokens. Mistral: Mistral Medium 3.5 wins on input price, Mistral: Mistral Medium 3.5 on output, and OpenAI: GPT-5.5 Pro has the larger context window.

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ModelContextInput $/MOutput $/MBlended $/M
OpenAI: GPT-5.5 Provision
openai
1,050,000$30.00/M$180/M$67.50/M
Mistral: Mistral Medium 3.5vision
mistralai
262,144$1.50/M$7.50/M$3.00/M

Frequently asked questions

Is OpenAI: GPT-5.5 Pro or Mistral: Mistral Medium 3.5 cheaper?
On a blended basis Mistral: Mistral Medium 3.5 is cheaper at $3.00/M per 1M tokens versus $67.50/M for OpenAI: GPT-5.5 Pro — about 96% less. Blended weights input 3:1 over output.
OpenAI: GPT-5.5 Pro vs Mistral: Mistral Medium 3.5: input token cost?
OpenAI: GPT-5.5 Pro charges $30.00/M per 1M input tokens; Mistral: Mistral Medium 3.5 charges $1.50/M. Mistral: Mistral Medium 3.5 is cheaper on input.
OpenAI: GPT-5.5 Pro vs Mistral: Mistral Medium 3.5: output token cost?
OpenAI: GPT-5.5 Pro charges $180/M per 1M output tokens; Mistral: Mistral Medium 3.5 charges $7.50/M. Mistral: Mistral Medium 3.5 is cheaper on output.
Which has the larger context window, OpenAI: GPT-5.5 Pro or Mistral: Mistral Medium 3.5?
OpenAI: GPT-5.5 Pro supports 1,050,000 tokens and Mistral: Mistral Medium 3.5 supports 262,144 tokens, so OpenAI: GPT-5.5 Pro handles longer inputs in a single call.
How do I track OpenAI: GPT-5.5 Pro and Mistral: Mistral Medium 3.5 price changes?
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Data: OpenRouter public model API, normalized to $/1M tokens. Blended = (3×input + output)/4. Generated 19 Oct 2026 22:00 UTC. Prices change often — confirm on the provider before committing spend.