 GPT-5 Codex | |
|---|---|
Model Provider The organization behind this AI's development | OpenAI |
Input Context Window Maximum input tokens this model can process at once | 400K tokens |
Output Token Limit Maximum output tokens this model can generate at once | 128K tokens |
Release Date When this model first became publicly available | September 23, 2025 6 days ago September 23rd, 2025 |
| GPT-5 Codex | |
|---|---|
Input Token Cost Cost per million input tokens | $1.25 per million tokens |
Output Token Cost Cost per million output tokens | $10.00 per million tokens |
| GPT-5 Codex | |
|---|---|
Input Types Supported input formats | textimage |
Output Types Supported output formats | text |
Tokenizer Text encoding system | GPT |
Key Features Advanced capabilities | ✓ Function Calling✓ Structured Output✓ Reasoning Mode✓ Content Moderation |
| GPT-5 Codex | |
|---|---|
MMLU Measures knowledge across 57 subjects like law, math, history, and science | Not available |
MMMU Measures understanding of combined text and images across various domains | Not available |
HellaSwag Measures common sense reasoning by having models complete sentences about everyday situations | Not available |
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