GPT-5.6 Sol Pro vs Mistral Medium 3.5

Mistral Medium 3.5 costs 63% less on input and 63% less on output than GPT-5.6 Sol Pro ($1.50 / $7.50 versus $4.00 / $20.00 per million tokens). GPT-5.6 Sol Pro accepts more context (1.1 M). On capabilities, GPT-5.6 Sol Pro has a reasoning mode. GPT-5.6 Sol Pro and Mistral Medium 3.5 offer a batch tier at half price for jobs that do not need an immediate answer.

Mistral Medium 3.5 is cheaper: $1.50 per million input tokens and $7.50 per million output tokens, versus $4.00 / $20.00 for GPT-5.6 Sol Pro.

GPT-5.6 Sol Pro accepts 1.1 M tokens of context; Mistral Medium 3.5 accepts 262 K.

GPT-5.6 Sol Pro was released on 07/09/2026; Mistral Medium 3.5 on 05/01/2026.

With 1,500 input and 400 output tokens per request: GPT-5.6 Sol Pro: $140.00; Mistral Medium 3.5: $52.50 a month, at list price.

From the public catalogs of OpenRouter, models.dev and LiteLLM, which publish each provider's list prices. They sync once a day and the last update date is shown above the comparison.

It is what the provider charges per million tokens you send (input) or the model generates (output). A token is roughly 4 characters. Output almost always costs more than input.