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Claude Opus 4.5 vs Devstral-2-123B
Comprehensive side-by-side LLM comparison
Claude Opus 4.5 leads with 6.3% higher average benchmark score. Devstral-2-123B offers 192 more tokens in context window than Claude Opus 4.5. Devstral-2-123B is $26.00 cheaper per million tokens. Claude Opus 4.5 supports multimodal inputs. Claude Opus 4.5 is available on 3 providers. Overall, Claude Opus 4.5 is the stronger choice for coding tasks.
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Anthropic
Claude Opus 4.5, released by Anthropic in November 2025, is a large language model from the Claude 4.5 family built for demanding reasoning tasks, advanced code generation, and complex agentic workflows. It features a 200K token context window, 64K maximum output tokens, native image understanding, and extended thinking with configurable effort levels. Opus 4.5 targets deep analytical work, multi-step tool orchestration, and applications requiring sustained reasoning across long, complex tasks.
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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.
1 month newer
Claude Opus 4.5
Anthropic
2025-11-01
Devstral-2-123B
Mistral AI
2025-12-09
Pricing Comparison
Cost per million tokens (USD)
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Claude Opus 4.5
Input:$5.00
Output:$25.00
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Devstral-2-123B
Input:$1.00
Output:$3.00($26.00 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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Claude Opus 4.5
Average Score:43.8%(+6.3%)
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Devstral-2-123B
Average Score:37.5%
Performance comparison across key benchmark categories
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Claude Opus 4.5
Coding43.8%(+6.3%)
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Devstral-2-123B
Coding37.5%
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Knowledge Cutoff
Training data recency comparison
Claude Opus 4.5
2025-05
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 Opus 4.5
3 providers
Anthropic
AWS Bedrock
Google Cloud Vertex AI
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Devstral-2-123B
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Claude Opus 4.5
Avg Score:43.8%(+6.3%)
Providers:3
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Devstral-2-123B
Avg Score:37.5%
Providers:1