Devstral2 Mistral

Devstral2 by Mistral delivers open-source coding supremacy through dual models (1.3B efficient, 123B maximum capability) plus autonomous CLI agent handling complex repository-wide changes via natural language. Developers accelerate from prototype to production by describing features in plain English while AI implements across entire codebases. The agent explores repositories, understands architecture, proposes refactors, executes multi-file changes, runs tests, and commits via Git with full context awareness up to 256K tokens. Both model sizes support local deployment for privacy-sensitive environments or cloud for maximum scale. Teams use Devstral2 for rapid MVP development, legacy code modernization, boilerplate elimination, bug triaging across repos, and documentation generation. The CLI agent operates independently while learning team conventions and codebase patterns. Completely free open-source with optional paid hosting. Requires substantial GPU resources for large model. Agent autonomy varies by codebase complexity and description clarity. See related.