OpenAI: GPT-5.1-Codex

GPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....

• Context window: 400,000 tokens
• Input: text, image
• Output: text
• Pricing: $1.25/M input tokens, $10/M output tokens

View on OpenRouter. Model data sourced from OpenRouter.