GPT-5 Codex
by OpenAI
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About
GPT-5 Codex, released by OpenAI in August 2025, is a coding-specialized large language model from the GPT-5 family engineered for software engineering, code generation, and agentic development workflows. It builds on GPT-5's architecture with optimizations targeting multi-file code editing, test generation, and automated debugging. GPT-5 Codex targets developers and agentic coding tools requiring a model tuned specifically for programming tasks.
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Timeline
ReleasedAug 1, 2025
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License & Family
License
Proprietary
Performance Overview
Performance metrics and category breakdown
Overall Performance
3 benchmarks
Average Score
54.0%
Best Score
74.5%
High Performers (80%+)
0Top Categories
Coding
54.0%
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All Benchmark Results for GPT-5 Codex
Complete list of benchmark scores with detailed information
| SWE Bench Verified | Coding | 74.50 | 74.5% | Unverified | |
| SWE-rebench | Coding | 44.00 | 44.0% | Unverified | |
| Terminal Bench 2.0 | Coding | 43.40 | 43.4% | Unverified |