Devstral Small 2

Devstral Small 2

Mistral · Released Dec 9, 2025 Emerging
Intelligence #349 / 571
26.2 Our Score
Speed #200 / 266
53.2 tokens / sec
Input
— Not priced
Output
— Not priced
Context
— Not reported

Analysis Summary

Devstral Small 2 is Mistral's small coding-specialist model, released in December 2025. With a coding index of 20.7 and a terminal bench hard score of 0.167, it punches above its weight for a compact model in agentic coding contexts. Its intelligence index of 19.5 and MMLU-Pro of 0.678 indicate reasonable general capability alongside its coding focus.

For businesses, it is best suited to lightweight software engineering assistance, code review, and scripting tasks where a small, efficient model is preferred over a large frontier system. The agentic index of 20.0 is modest, limiting its reliability for fully autonomous coding pipelines, but the terminal bench performance suggests it can handle structured coding tasks with reasonable consistency.

No pricing data is available, which limits direct cost-performance comparison. Teams looking for a compact, coding-oriented model from Mistral for integration into development tooling or CI pipelines will find Devstral Small 2 a practical option, particularly where inference cost and latency are priorities.

Assessed June 6, 2026

Editorial notes

Devstral Small 2 is Mistral's compact coding-focused model with a coding index of 20.7 and a strong terminal bench score, offering good value for lightweight software engineering tasks with no listed pricing.

Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?

Performance Profile

Intelligence3.2Technical2.9Value0Content5
Intelligence 3.2/10
Technical 2.9/10
Content 5/10
Value 0/10

How Devstral Small 2 compares

Devstral Small 2 ranks #173 of 374 AI models we track for overall intelligence, #138 of 311 for coding, #173 of 286 for agentic tasks. Devstral Small 2 is currently free to use via OpenRouter.

Performance Indices

Source: Artificial Analysis

19.5 Intelligence Index
20.7 Coding Index
20 Agentic Index
34.3 Math Index

Benchmark Scores

Intelligence

GPQA Diamond 53.2% Graduate-level scientific reasoning
HLE 3.4% Humanity's Last Exam
MMLU Pro 67.8% Multi-task language understanding
AIME 2025 34.3% Competition mathematics (2025)
SciCode 28.8% Scientific computing

Technical

LiveCodeBench 34.8% Live coding evaluation
TerminalBench Hard 16.7% Agentic terminal tasks
τ²-Bench 23.4% Conversational agent benchmark

Content

IFBench 31.2% Instruction following
LCR 24% Long-context reasoning

Benchmark data from Artificial Analysis and Hugging Face

How does Devstral Small 2 stack up?

Compare side-by-side with other emerging models.

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Model Information

ProviderMistral
Release Date December 9, 2025
Status Active

Leaderboard Categories

Frequently asked questions about Devstral Small 2

How much does Devstral Small 2 cost?

Devstral Small 2 is currently available for free via OpenRouter.

Is Devstral Small 2 good for coding?

On our coding benchmark index, Devstral Small 2 ranks #138 of 311 models, placing it in the broader range of the field for code generation and debugging.

Who created Devstral Small 2?

Devstral Small 2 is developed by Mistral and was released on December 9, 2025.