Devstral-2-123B
by Mistral AI
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About
Devstral 2, released by Mistral AI on December 9, 2025, is a 123 billion parameter dense transformer model specifically designed for software engineering tasks. It features a 256K token context window and achieved 72.2% on SWE-bench Verified at release, making it a competitive open-weight option for automated coding and agentic development. Devstral 2 targets code generation, multi-file software engineering, and agentic development workflows under a modified MIT license.
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Pricing Range
Input (per 1M)$1.00 -$1.00
Output (per 1M)$3.00 -$3.00
Providers1
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Timeline
ReleasedDec 9, 2025
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License & Family
License
Modified MIT
Performance Overview
Performance metrics and category breakdown
Overall Performance
1 benchmarks
Average Score
37.5%
Best Score
37.5%
High Performers (80%+)
0Performance Metrics
Max Context Window
264.2KTop Categories
Coding
37.5%
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All Benchmark Results for Devstral-2-123B
Complete list of benchmark scores with detailed information
| SWE-rebench | Coding | 37.50 | 37.5% | Unverified |