Devstral models

Strongest: Devstral 2

Mistral deprecated Devstral 2 on 2026-05-22 with a retirement date of 2026-07-31 and names Mistral Medium 3.5 as its replacement; it is gone from Mistral's API pricing page, and the open weights remain downloadable from Hugging Face. Devstral 2 (model ID devstral-2-2512, shipped 9 December 2025) is Mistral's open-weight agentic-coding model, launched alongside the Mistral Vibe CLI. It is a 125B-parameter dense transformer with 256K context, built for multi-file edits, repo planning, PR generation, and test running, scoring 72.2% on SWE-bench Verified. Its API list price was $0.40/$2.00 until retirement — meaningfully cheaper on output than Medium 3.5 ($7.50). The license is modified-MIT on the 123B (open with a large-revenue carve-out), and a companion Devstral Small 2 (24B) is clean Apache 2.0. The buyer's sentence: it was the budget open-weight agentic coder in Mistral's lineup, still in the 70%-SWE-bench tier after Medium 3.5 took the crown, and after the API retirement it lives on as self-hosted weights.