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GPT-5 Codex

OpenAI

GPT-5 Codex is specifically trained for code review and finding critical vulnerabilities. During analysis, it navigates your codebase and analyzes code patterns to identify potential security vulnerabilities, performance issues, and bugs.

Key Specifications

Parameters
-
Context
200.0K
Release Date
September 15, 2025
Average Score
74.5%

Timeline

Key dates in the model's history
Announcement
September 15, 2025
Today
March 25, 2026

Technical Specifications

Parameters
-
Training Tokens
-
Knowledge Cutoff
September 30, 2024
Family
-
Capabilities
MultimodalZeroEval

Pricing & Availability

Input (per 1M tokens)
$2.00
Output (per 1M tokens)
$6.00
Max Input Tokens
200.0K
Max Output Tokens
64.0K
Supported Features
Function CallingStructured OutputCode ExecutionWeb SearchBatch InferenceFine-tuning

Benchmark Results

Model performance metrics across various tests and benchmarks

Programming

Programming skills tests
SWE-Bench Verified
GPT-5 Codex specialized for code review and critical flaw detection with enhanced agentic coding capabilities.Self-reported
74.5%

License & Metadata

License
proprietary
Announcement Date
September 15, 2025
Last Updated
September 18, 2025

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