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GPT-5 Codex vs Phi 4 Reasoning
Comprehensive side-by-side LLM comparison
. Both models have their strengths depending on your specific coding needs.
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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.
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Microsoft
Phi-4 Reasoning was developed to incorporate extended analytical thinking into the Phi-4 architecture, designed to spend more time on complex problem-solving. Built to combine compact model efficiency with reasoning depth, it represents Microsoft's exploration of thoughtful small models.
4 months newer
Phi 4 Reasoning
Microsoft
2025-04-30
GPT-5 Codex
OpenAI
2025-09-15
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Knowledge Cutoff
Training data recency comparison
GPT-5 Codex
2024-09-30
Phi 4 Reasoning
2025-03-01
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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GPT-5 Codex
0 providers
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Phi 4 Reasoning
0 providers
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GPT-5 Codex
Avg Score:0.0%
Providers:0
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Phi 4 Reasoning
Avg Score:0.0%
Providers:0