Devstral Small 2 | Epoch AI

ECI

N/A

Mistral AI

Dec. 9, 2025

Open weights

Devstral Small 2 is an open-weights model from Mistral AI, released December 9, 2025.

Devstral Small 2 vs select alternatives

Domain	Benchmark	Devstral Small 2 Mistral AI Dec. 9, 2025 Open weights	Gemini 3 Pro Google DeepMind Nov. 18, 2025 Closed weights	GPT-5 Pro OpenAI Oct. 7, 2025 Closed weights	Claude Opus 4.5 Anthropic Nov. 24, 2025 Closed weights
Science	CritPtBest score 32%	0%	7%	n/a	n/a

Model metadata

General
Organization	Mistral AI
Release date	Dec. 9, 2025
Model accessibility	Open weights
Country	France
Knowledge cutoff	Unknown
Provider notes	Introducing: Devstral 2 and Mistral Vibe CLI

Pricing
Input price	—
Output price	—

Training
Parameters	2.4e10
Training compute	Unknown
Training hardware	Unknown
Training time	Unknown
Training dataset size	Unknown