Devstral 2
Devstral 2 is a state-of-the-art, open-weight agentic coding model developed by Mistral AI. Released in December 2025, it features a dense Transformer architecture with 123 billion parameters and a 256k token context window. Designed specifically for software engineering tasks, Devstral 2 excels at codebase exploration, multi-file editing, and complex instruction following. It supports multimodal inputs (text, code, and images) and is optimized for agentic workflows, achieving a score of 72.2% on the SWE-bench Verified benchmark. The model is released alongside the Mistral Vibe CLI for terminal-based code automation. While the weights are publicly available, the 123B model is distributed under a Modified MIT license with commercial restrictions for large entities.
Specifications
- Parameters
- 123B
- Architecture
- Dense Transformer
- License
- Modified MIT
- Context Window
- 262,144 tokens
- Max Output
- 262,144 tokens
- Training Data Cutoff
- Feb 2024
- Type
- multimodal
- Modalities
- textcodeimage
Benchmark Scores
Advanced Specifications
- Model Family
- Devstral
- Finetuned From
- null
- API Access
- Available
- Chat Interface
- Available
- Multilingual Support
- Yes
- Variants
- Devstral 2 (123B)Devstral Small 2 (24B)Devstral 2 InstructDevstral Small 2 Instruct
- Hardware Support
- NVIDIA H100 (Minimum 4x for 123B)NVIDIA A100NVIDIA RTX 4090 (for Devstral Small 2)
Capabilities & Limitations
- Capabilities
- agentic codingmulti-file editingcodebase explorationreasoningvision-to-codetool usefunction callingstructured output
- Known Limitations
- High hardware requirements for 123B model (requires data center GPUs)Knowledge cutoff (Feb 2024) may limit awareness of very recent librariesCommercial use restriction for companies with >$20M monthly revenue (Modified MIT license)
- Notable Use Cases
- software engineering agentsautomated bug fixinglegacy system modernizationrepository-level code refactoringterminal-based coding assistance (via Vibe CLI)
- Function Calling Support
- Yes
- Tool Use Support
- Yes