Mistral Math Medium Open weights

Leanstral 1.5

133 days since Mistral announced it · 2 Jul 2026

Leanstral 1.5 is an open-weights math model from Mistral, announced 2 Jul 2026. It has 119B-A6B parameters.

Input: —; per 1M tokens
Cache write: —; per 1M tokens
Cache read: —; per 1M tokens
Output: —; per 1M tokens
Context window: —; tokens
Parameters: 119B-A6B; total

No price on the lab’s own pages.

Announcement: mistral.ai/news/leanstral-1-5

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Mistral · Medium · Leanstral

open weights

Leanstral 1.5 +108d 2 Jul 2026
Leanstral 16 Mar 2026

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Facts last updated 7 Nov 2026, from Mistral’s own pages.