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Devstral Medium vs GPT-5 Codex
Comprehensive side-by-side LLM comparison
GPT-5 Codex leads with 12.9% higher average benchmark score. Overall, GPT-5 Codex is the stronger choice for coding tasks.
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Mistral AI
Devstral Medium was created as a development-focused model, designed to assist with software engineering workflows and developer-centric tasks. Built to provide balanced capability for coding, debugging, and technical documentation, it serves as a versatile tool for professional development environments.
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OpenAI
GPT-5 Codex was developed as a specialized variant of GPT-5 optimized for programming and software development tasks. Built to understand and generate code across multiple programming languages, it serves developers with enhanced capabilities for code completion, debugging, translation, and explanation of complex codebases.
2 months newer
Devstral Medium
Mistral AI
2025-07-10
GPT-5 Codex
OpenAI
2025-09-15
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Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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Devstral Medium
Average Score:61.6%
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GPT-5 Codex
Average Score:74.5%(+12.9%)
Performance comparison across key benchmark categories
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Devstral Medium
Coding61.6%
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GPT-5 Codex
Coding74.5%(+12.9%)
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Knowledge Cutoff
Training data recency comparison
GPT-5 Codex
2024-09-30
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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Devstral Medium
1 providers
Mistral AI
Throughput: 137.1 tok/s
Latency: 0.23ms
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GPT-5 Codex
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Devstral Medium
Avg Score:61.6%
Providers:1
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GPT-5 Codex
Avg Score:74.5%(+12.9%)
Providers:0