Mistral · lightweight line · open weights
The newest Mistral Medium model is Mistral Medium 3.5, released on April 29, 2026. It has been 178 days since then and the line's usual gap is 179 days, so by its own rhythm the next Mistral Medium model is due. That usual gap comes from only 2 gaps, so it is a rough guide.
How long it has been since the last release against the line's usual gap and its recent ones — the rhythm, not a date.
Latest: Mistral Medium 3.5 · Apr 29, 2026
Every Monday, only when something shipped: the AI models that came out, what each one changed, and which lines are due next.
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Newest first — what each version changed versus the one before, in Mistral's own numbers.
Mistral Medium 3.5 merges instruction-following, reasoning and coding into one 128B dense model released with open weights, with configurable reasoning effort and a 256k-token context window, double Mistral Medium 3.1's 128k.
Compared with Mistral Medium 3.1 · the model it replaces
Fixes almost 8 in 10 real bugs from real software projects
SWE-Bench Verified — fixing real bugs in real software projects
77.6%
✦ ahead of Devstral 2, which it replaces in Mistral Vibe
What developers pay to use it through Mistral's API
API price per 1M tokens — input / output
$1.50 / $7.50
✦ launch price on Mistral's API