Mistral Medium 3.5 API Pricing and Speed

• $1.50Input per 1M tokens, from Mistral AI Published
• $7.50Output per 1M tokens, from Mistral AI Published
• $0.15Cached input per 1M tokens, from Mistral AI Published

OpenRouter sends a call without a pinned provider to one of these endpoints, and each endpoint has its own price. Prices are USD per 1M tokens, input / output.

Pinned min: $1.50 / $7.50 · Mistral (mistral/zdr)

Unpinned range: input $1.50–$1.65, output $7.50–$8.25 across 2 endpoints of 1 provider (listing shows $1.50 / $7.50).

Models with the widest provider price spread on OpenRouter

{"provider": {"order": ["mistral/zdr"], "allow_fallbacks": false}}

With fallbacks turned off, OpenRouter does not move the call to another provider. A full endpoint tag pins that endpoint; the provider name alone covers all of its endpoints (OpenRouter provider routing).

• Hidden reasoning tokens are billed as output, at the output price, even though they are not part of the answer.

How the test works and what each number means: methodology. The figures are also in our open data.