Mistral: Devstral 2 2512

Mistral: Devstral 2 2512

mistralai · Released Dec 9, 2025
42
Our Score

Devstral 2 is a state-of-the-art open-source model by Mistral AI specializing in agentic coding. It is a 123B-parameter dense transformer model supporting a 256K context window. Devstral 2 supports exploring codebases and orchestrating changes across multiple files while maintaining architecture-level context. It tracks framework dependencies, detects failures, and retries with corrections—solving challenges like bug fixing and modernizing legacy systems. The model can be fine-tuned to prioritize specific languages or optimize for large enterprise codebases. It is available under a modified MIT license.

$0.40 / 1M Input Price
$2.00 / 1M Output Price
262,144 tokens Context Window

Capabilities

Tool Use Function Calling

Architecture

ModalityText → Text
TokenizerMistral

Performance Indices

Source: Artificial Analysis

22 Intelligence Index
23.7 Coding Index
21.9 Agentic Index
36.7 Math Index

Benchmark Scores

Evaluations

GPQA Diamond 59.4%
Graduate-level scientific reasoning
HLE 3.6%
Humanity's Last Exam
MMLU Pro 76.2%
Multi-task language understanding
LiveCodeBench 44.8%
Live coding evaluation
SciCode 33.1%
Scientific computing
AIME 2025 36.7%
Competition mathematics (2025)
IFBench 38.1%
Instruction following
LCR 30%
Long-context reasoning
TerminalBench Hard 18.9%
Agentic terminal tasks
τ²-Bench 24.9%
Conversational agent benchmark

Benchmark data from Artificial Analysis and Hugging Face

Model Information

OpenRouter ID mistralai/devstral-2512
Providermistralai
Release Date December 9, 2025
Context Length262,144 tokens
Status Active

Pricing

Token Type Cost per 1M tokens Cost per 1K tokens
Input $0.40 $0.000400
Output $2.00 $0.002000

Live Performance

Live endpoint metrics — refreshed every 30 minutes.

100%
Avg Uptime
509ms
Best Latency (TTFT)
58 tok/s
Best Throughput
1/1
Active Endpoints
Available via: Mistral

Leaderboard Categories