devstral-2512
Devstral 2 is an open-source Mistral AI model specialized in agentic coding: a 123B-parameter dense transformer with a 256K-token context window for exploring and changing codebases.
Pricing: Input 80 credits / 1M tokens (≈ $0.40), Output 400 credits / 1M tokens (≈ $2.00).
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Devstral 2 2512 API on ModelFold
Devstral 2 is an open-source Mistral AI model specialized in agentic coding: a 123B-parameter dense transformer with a 256K-token context window for exploring and changing codebases. Try Devstral 2 2512 in the ModelFold Playground, then call it from your own code through an OpenAI-compatible chat completions API.
What Is the Devstral 2 2512 API
Devstral 2 2512 at a glance
Devstral 2 2512 is a chat model from Mistral AI. It accepts text and files (such as PDF) as input and returns text, with a context window of up to 262K tokens.
Use it without hosting anything
On ModelFold you call Devstral 2 2512 with a single API key — no model weights to download and no inference servers to run. The same key also works for the other chat, image, video and audio models on ModelFold.
Core Capabilities of Devstral 2 2512
Up to 262K tokens of context
Keep long conversations, large documents and sizeable code in a single request, so the model can reason over the full material instead of fragments.
Understands files (such as PDF)
Besides text, Devstral 2 2512 accepts files (such as PDF) as input, so a single request can combine instructions with visual or other media.
Function calling
Devstral 2 2512 supports tool (function) calling: describe your functions in the request and the model returns structured calls your code can run — the basis for agents and integrations.
Structured outputs
Ask for JSON that follows a schema (response_format), which makes extraction, classification and system integrations more reliable.
How to Use Devstral 2 2512 on ModelFold
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Step 1: Try it in the Playground
Open the Playground at the top of this page, type a prompt and see how Devstral 2 2512 responds before writing any code.
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Step 2: Create an API key
Sign in to ModelFold and create an API key in the console. Keep it secret and send it as a Bearer token.
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Step 3: Send a request
Call POST https://modelfold.ai/v1/chat/completions with "model": "devstral-2512" and your messages. Existing OpenAI-compatible SDKs work by changing the base URL and key.
- ✓
Step 4: Ship and monitor
Integrate the response into your product and check token usage and spend for every call in the console logs.
What You Can Build with Devstral 2 2512
AI coding assistants
Generate, explain, debug and refactor code, review pull requests and work through multi-file changes in developer tools and IDE plugins.
Autonomous agents
Build agents that plan multi-step tasks, call your tools and APIs, and keep working toward a goal across long sessions.
Tool-calling backends
Route requests, call functions and chain API calls as the worker model inside larger agent systems.
Long-document workflows
Feed in long reports, contracts, manuals or codebases and ask for summaries, comparisons and answers grounded in the material.
Frequently Asked Questions
What is Devstral 2 2512?⌄
Devstral 2 is an open-source Mistral AI model specialized in agentic coding: a 123B-parameter dense transformer with a 256K-token context window for exploring and changing codebases.
Which inputs does Devstral 2 2512 support?⌄
Devstral 2 2512 accepts text and files (such as PDF) and returns text. Through ModelFold you send text messages; documents attached in the Playground are converted to text.
How long is the context window of Devstral 2 2512?⌄
Up to 262K tokens, shared between your input and the model’s output.
Does Devstral 2 2512 support function calling?⌄
Yes. Devstral 2 2512 supports tools / function calling through the standard tools parameter of the chat completions API.
How is Devstral 2 2512 billed on ModelFold?⌄
Pay as you go by tokens: input and output tokens are charged at the per-million-token prices shown on this page. There is no monthly fee, and failed requests are not charged.
How do I call Devstral 2 2512 through the API?⌄
Send a POST request to https://modelfold.ai/v1/chat/completions with "model": "devstral-2512", using your ModelFold API key as the Bearer token.
| Input | 80 credits 1M tokens≈ $0.40 |
| Output | 400 credits 1M tokens≈ $2.00 |
Billed per token: input and output are priced separately, and thinking tokens count as output. The Playground charges exactly the same way.
Read API docs →AI Agents · Claude Code / Cursor / Trae →curl https://modelfold.ai/v1/chat/completions \
-H "Authorization: Bearer $MODELFOLD_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"devstral-2512","messages":[{"role":"user","content":"Hello"}]}'