Model Comparison

GPT-5 Codex vs Phi 4 Mini

Comparing GPT-5 Codex and Phi 4 Mini across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

GPT-5 Codex and Phi 4 Mini don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

License

Usage and distribution terms

GPT-5 Codex is licensed under a proprietary license, while Phi 4 Mini uses MIT.

License differences may affect how you can use these models in commercial or open-source projects.

GPT-5 Codex

Proprietary

Closed source

Phi 4 Mini

MIT

Open weights

Release Timeline

When each model was launched

GPT-5 Codex was released on 2025-09-15, while Phi 4 Mini was released on 2025-02-01.

GPT-5 Codex is 8 months newer than Phi 4 Mini.

GPT-5 Codex

Sep 15, 2025

8 months ago

7mo newer
Phi 4 Mini

Feb 1, 2025

1.3 years ago

Knowledge Cutoff

When training data ends

GPT-5 Codex has a knowledge cutoff of 2024-09-30, while Phi 4 Mini has a cutoff of 2024-06-01.

GPT-5 Codex has more recent training data (up to 2024-09-30), making it potentially better informed about events through that date compared to Phi 4 Mini (2024-06-01).

GPT-5 Codex

Sep 2024

3 mo newer
Phi 4 Mini

Jun 2024

Outputs Comparison

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Key Takeaways

OpenAI

No standout differentiators in the data we have for this pair.

Microsoft
Has open weights

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-5 Codex
Microsoft
Phi 4 Mini

FAQ

Common questions about GPT-5 Codex vs Phi 4 Mini.

Which is better, GPT-5 Codex or Phi 4 Mini?

GPT-5 Codex (OpenAI) and Phi 4 Mini (Microsoft) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does GPT-5 Codex compare to Phi 4 Mini in benchmarks?

GPT-5 Codex scores SWE-Bench Verified: 74.5%. Phi 4 Mini scores GSM8k: 88.6%, ARC-C: 83.7%, BoolQ: 81.2%, OpenBookQA: 79.2%, PIQA: 77.6%.

What are the main differences between GPT-5 Codex and Phi 4 Mini?

Key differences include licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-5 Codex and Phi 4 Mini?

GPT-5 Codex is developed by OpenAI and Phi 4 Mini is developed by Microsoft.