Overview
Devstral is a collaboration between Mistral AI and All Hands AI, the team behind the OpenHands agent. Instead of optimizing for single-function benchmarks, it was fine-tuned to solve real GitHub issues end to end. At launch it was the top open model on SWE-bench Verified, and the July 2025 update (Small 1.1) pushed the score further.
Strengths
- Purpose-built for agent loops: reading files, editing, running tests
- Small enough for local, private agentic workflows
- Permissive Apache 2.0 license
- 128K context window
Run it locally
ollama run devstralThen point an agent such as OpenHands at your local Ollama endpoint.
Good fit for
Running a fully local coding agent with no code leaving your machine.
Frequently asked questions
What is Devstral designed for?
Agentic software engineering. It explores a codebase, edits multiple files and runs tools inside agent scaffolds such as OpenHands.
Can Devstral run on a laptop?
Yes. At 24B parameters it runs on a single RTX 4090 or a Mac with 32 GB of RAM when quantized.