Devstral is an agentic LLM for software engineering tasks built under a collaboration between Mistral AI and All Hands AI 🙌. Devstral excels at using tools to explore codebases, editing multiple files and power software engineering agents. The model achieves remarkable performance on SWE-bench which positionates it as the #1 open source model on this benchmark.

It is finetuned from Mistral-Small-3.1, therefore it has a long context window of up to 128k tokens. As a coding agent, Devstral is text-only and before fine-tuning from Mistral-Small-3.1 the vision encoder was removed.

Learn more about Devstral in our blog post. Key Features:

Agentic coding: Devstral is designed to excel at agentic coding tasks, making it a great choice for software engineering agents.

lightweight: with its compact size of just 24 billion parameters, Devstral is light enough to run on a single RTX 4090 or a Mac with 32GB RAM, making it an appropriate model for local deployment and on-device use.

Apache 2.0 License: Open license allowing usage and modification for both commercial and non-commercial purposes.

Context Window: A 128k context window.

Tokenizer: Utilizes a Tekken tokenizer with a 131k vocabulary size.

Learn more about Devstral in our blog post.

https://mistral.ai/news/devstral