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Devstral 2
Mistral
December 9, 2025
· 123B
· Open source
Devstral 2
Open-weight coding model, 72.2% SWE-bench Verified at 7x lower cost than Sonnet
BENCHMARKS
Benchmark
Score
Rank
SWE-bench
Real-world GitHub issue resolution
72.2%
#23
/ 39
API
Input
$0.4
per 1M tokens
Output
$2
per 1M tokens
Context
256K
tokens
Speed
72.1
tokens / sec
OFFICIAL ANNOUNCEMENT
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Mistral Large 3
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GPT-5.2