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GPT-5.1-Codex-Max

GPT-5.1-Codex-Max by OpenAI: intelligence index 74.9, $1.25 in / $10.00 out per 1M tokens, 400K context, with a source on every number.

Vendor
OpenAI
Intelligence index
74.9
Price per 1M tokens
$1.25 in · $10.00 out
Context
400K tokens
Released
2025-11-19

Sources