OpenAI
GPT-5.1-Codex-Max
Released 2025-12-04
GPT-5.1-Codex-Max is OpenAI’s latest agentic coding model, designed for long-running, high-context software development tasks. It is based on an updated version of the 5.1 reasoning stack and trained on agentic...
You send / 1M
$1.25
tokens in
It replies / 1M
$10.00
tokens out
Memory
400K
tokens it can read at once
Typical request
$0.0066
1,000 words in, 400 out
Data privacy
No training or retention: Yes. At least one provider serves it with zero data retention.
| Provider | You send / 1M | It replies / 1M | Uptime | Privacy policy |
|---|---|---|---|---|
| Azure | $1.25 | $10.00 | 100% | Read |
Based on OpenRouter and Vercel AI Gateway data. Confirm terms with the provider before sending sensitive data.
What it can do
- Reads: text, image
- Writes: text
- Reasoning: Yes
- Tool calling: Yes
- Longest reply: 128K tokens
- Repeated text is billed at $0.125 per 1M (prompt caching)
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Appears in
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