OpenRouterGPT-5.3 Chat model ID, context window & pricing
gpt
Quick facts
Model ID openai/gpt-5.3-chat
Source OpenRouter
Context Window 128000
Pricing $1.75 input / $14.00 output per 1M tokens
Capabilities tool calling, structured output
Model overview
GPT-5.3 Chat is an AI model from OpenRouter with 128000 token context window and text, image, pdf input support.
Published pricing is $1.75 input and $14.00 output per 1M tokens.
- Workloads that use text, image, pdf inputs with text outputs.
- Agent and tool workflows that need function calling.
Model ID openai/gpt-5.3-chat
Provider OpenRouter
Family gpt
Status -
Knowledge Cutoff -
Release Date 2026-03-03
Input Modalities text, image, pdf
Output Modalities text
Context Window 128000
Input Limit -
Output Limit 16384
Tool Calling Yes
Reasoning No
Structured Output Yes
Temperature Control No
Open Weights No
Input Cost / 1M tokens $1.75
Output Cost / 1M tokens $14.00
Reasoning Cost / 1M tokens -
Cache Read Cost / 1M tokens $0.17
Cache Write Cost / 1M tokens -