# Devstral 2 Devstral 2 was [[Mistral AI]]'s second-generation agentic coding model, the successor to the original [[Devstral]] (Devstral Small 2505). It served as the default driver behind Mistral's coding agent in the [[Mistral Vibe]] product until April 2026, when it was replaced by the merged flagship [[Mistral Medium 3.5]]. ## Position in the line - **[[Devstral]]** (May 2025) — first generation; Devstral-Small-2505; lightweight (single RTX 4090 / 32GB Mac); SWE-Bench Verified ~46.8% - **Devstral 2** — second generation; default for Mistral Vibe coding agents until early 2026 - **[[Mistral Medium 3.5]]** (Apr 2026) — replaces Devstral 2 in Vibe; SWE-Bench Verified 77.6% per Mistral ## Why it matters in the version chain - Marks the moment Mistral's coding line jumped from a small specialist model to a general flagship model - Replacement signals the consolidation strategy — Mistral is folding coding into one merged model rather than maintaining a separate Devstral line - Reference point for "what was the open coding-model frontier on Mistral's side before the merge" ## Caveats - Public detail on Devstral 2 (architecture, parameter count, benchmark suite) is sparse compared to the original Devstral release post; most facts come from the Medium 3.5 launch material that frames Devstral 2 as the predecessor - Whether Devstral 2 remains available as a distinct API endpoint after the Medium 3.5 cutover is unclear — check current [[La Plateforme]] docs ## References - Mistral Medium 3.5 launch post (positions Devstral 2 as the model being replaced): https://mistral.ai/news/vibe-remote-agents-mistral-medium-3-5 - Original Devstral announcement (for the line context): https://mistral.ai/news/devstral ## Related - [[Mistral AI]] - [[Devstral]] - [[Mistral Medium 3.5]] - [[Mistral Vibe]] - [[Codestral]] - [[Mistral Small 4]] - [[Large Language Models (LLMs)]]