OpenRouterGPT-5.1 Chat model ID, context window & pricing
gpt-codex
Quick facts
Model ID openai/gpt-5.1-chat
Source OpenRouter
Context Window 128000
Pricing $1.25 input / $10.00 output per 1M tokens
Capabilities tool calling, structured output
Model overview
GPT-5.1 Chat is an AI model from OpenRouter with 128000 token context window and pdf, image, text input support.
Published pricing is $1.25 input and $10.00 output per 1M tokens.
- Workloads that use pdf, image, text inputs with text outputs.
- Agent and tool workflows that need function calling.
Model ID openai/gpt-5.1-chat
Provider OpenRouter
Family gpt-codex
Status -
Knowledge Cutoff 2024-09-30
Release Date 2025-11-13
Input Modalities pdf, image, text
Output Modalities text
Context Window 128000
Input Limit -
Output Limit 32000
Tool Calling Yes
Reasoning No
Structured Output Yes
Temperature Control No
Open Weights No
Input Cost / 1M tokens $1.25
Output Cost / 1M tokens $10.00
Reasoning Cost / 1M tokens -
Cache Read Cost / 1M tokens $0.13
Cache Write Cost / 1M tokens -