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Claude Sonnet 4.5 vs Devstral-2-123B
Comprehensive side-by-side LLM comparison
Claude Sonnet 4.5 leads with 9.6% higher average benchmark score. Devstral-2-123B offers 192 more tokens in context window than Claude Sonnet 4.5. Devstral-2-123B is $14.00 cheaper per million tokens. Claude Sonnet 4.5 supports multimodal inputs. Claude Sonnet 4.5 is available on 3 providers. Overall, Claude Sonnet 4.5 is the stronger choice for coding tasks.
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Anthropic
Claude Sonnet 4.5, released by Anthropic in September 2025, is a large language model from the Claude 4.5 family that balances response quality and efficiency for coding, agentic tasks, and analytical work. It features a 200K token context window (extendable to 1M tokens in beta), 64K maximum output tokens, native image understanding, and extended thinking support. Sonnet 4.5 targets use cases that require a balance of throughput and reasoning depth, including code generation, data analysis, and multi-step agentic pipelines.
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Mistral AI
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.
2 months newer
Claude Sonnet 4.5
Anthropic
2025-09-29
Devstral-2-123B
Mistral AI
2025-12-09
Pricing Comparison
Cost per million tokens (USD)
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Claude Sonnet 4.5
Input:$3.00
Output:$15.00
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Devstral-2-123B
Input:$1.00
Output:$3.00($14.00 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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Claude Sonnet 4.5
Average Score:47.1%(+9.6%)
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Devstral-2-123B
Average Score:37.5%
Performance comparison across key benchmark categories
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Claude Sonnet 4.5
Coding47.1%(+9.6%)
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Devstral-2-123B
Coding37.5%
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Knowledge Cutoff
Training data recency comparison
Claude Sonnet 4.5
2025-01
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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Claude Sonnet 4.5
3 providers
Anthropic
AWS Bedrock
Google Cloud Vertex AI
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Devstral-2-123B
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Claude Sonnet 4.5
Avg Score:47.1%(+9.6%)
Providers:3
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Devstral-2-123B
Avg Score:37.5%
Providers:1