Devstral 2
Mistral AI's Devstral coding model via the Vercel AI Gateway: agentic software engineering, multi-file edits, and tool use at a 256k context window. Available at the base tier. Uses 3 base requests per send before length multipliers. Does not support web search or image input.
You always get the exact model you pick — we never silently route you to another.
About Devstral 2
Devstral 2 is Mistral's coding-focused model, tuned for agentic software engineering rather than general chat, and on just4o.chat it is served through the Vercel AI Gateway as mistral/devstral-2. It targets the things real coding work demands: multi-file edits, navigating and reasoning about a codebase, and using tools in a loop to get a task done. A 256k-token context window means it can hold a sizable chunk of a repository at once, and function calling lets it drive editors, test runners, and other tooling. On just4o.chat it is a base-tier model on every plan, billed at 3 base requests per send before length multipliers, at a provider price of $0.40 per million input and $2.00 per million output tokens. It is text-only with no native web search, so it is built for the editor, not for research. For developers who want a capable, affordable coding agent that can work across files, Devstral 2 is a strong fit; for lighter or higher-volume coding, its smaller sibling Devstral Small 2 costs even less.
Best for
- Agentic software engineering — multi-step coding tasks driven by tool calls
- Multi-file edits and refactors across a codebase
- Code generation, debugging, and root-cause analysis
- Test scaffolding and iterative fix-and-verify loops
- Working with large repositories thanks to the 256k context window
Specifications
| Provider | Mistral |
|---|---|
| Released | 2025-12 |
| Intelligence | High |
| Speed | Fast |
| Context window | 256,000 tokens |
| Knowledge cutoff | Not officially published |
| Input price | $0.40 / 1M tokens |
| Output price | $2.00 / 1M tokens |
| Request cost | 3 base requests |
| Plan tier | Base |
| Input | Text |
| Output | Text |
| Features | 3 base requests per send before length multipliers, Function calling supported, Optimized for agentic coding workflows, Served through the Vercel AI Gateway (mistral/devstral-2), Mistral applies zero data retention to gateway traffic |
| Model ID | devstral-2 |
Frequently asked questions
Agentic coding — multi-file edits, codebase reasoning, and tool use — rather than general conversation. It is Mistral's developer-focused model.
Through the Vercel AI Gateway's OpenAI-compatible endpoint under the mistral/devstral-2 route. Mistral applies zero data retention to gateway traffic.
$0.40 per million input tokens and $2.00 per million output tokens at provider reference pricing. On just4o.chat it is a base model that uses 3 base requests per send before length multipliers.
No. Devstral 2 is text-only and has no native web search; it is designed for coding tasks in the editor.
Devstral 2 is the larger, more capable coding model; Devstral Small 2 is cheaper and faster for lighter or higher-volume work. Both share the 256k context window and function calling.