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GPT-5 Codex vs Phi 4
Comprehensive side-by-side LLM comparison
Phi 4 leads with 56.0% higher average benchmark score. Overall, Phi 4 is the stronger choice for coding tasks.
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OpenAI
GPT-5 Codex is a language model developed by OpenAI. It achieves strong performance with an average score of 74.5% across 1 benchmarks. Notable strengths include SWE-Bench Verified (74.5%). Released in 2025, it represents OpenAI's latest advancement in AI technology.
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Microsoft
Phi 4 is a language model developed by Microsoft. It achieves strong performance with an average score of 66.0% across 13 benchmarks. It excels particularly in MMLU (84.8%), HumanEval+ (82.8%), HumanEval (82.6%). The model is available through 1 API provider. It's licensed for commercial use, making it suitable for enterprise applications. Released in 2024, it represents Microsoft's latest advancement in AI technology.
9 months newer
Phi 4
Microsoft
2024-12-12
GPT-5 Codex
OpenAI
2025-09-15
Performance Metrics
Context window and performance specifications
Average performance across 14 common benchmarks
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GPT-5 Codex
Average Score:5.3%
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Phi 4
Average Score:61.3%(+56.0%)
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Knowledge Cutoff
Training data recency comparison
Phi 4
2024-06-01
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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GPT-5 Codex
0 providers
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Phi 4
1 providers
DeepInfra
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GPT-5 Codex
Avg Score:5.3%
Providers:0
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Phi 4
Avg Score:61.3%(+56.0%)
Providers:1