Devstral
Mistral AI
Mistral AI and All Hands AI released Devstral, an open-source language model designed to solve real-world software engineering problems by understanding code within large codebases and identifying bugs across interconnected components. The model achieved 46.8% on SWE-Bench Verified, a benchmark of 500 real GitHub issues, outperforming prior open-source models by over 6 percentage points and exceeding larger proprietary models like GPT-4.1-mini by 20 percentage points. Devstral is available under Apache 2.0 license for local deployment on consumer hardware, enterprise use for privacy-sensitive code, and integration into coding tools, with API access priced at $0.1 per million input tokens.
