OpenRouter

OpenAI: GPT-5.3 Chat

Name: OpenAI: GPT-5.3 Chat
Brand: OpenRouter

Canonical ID: openrouter/openai/gpt-5.3-chat

More OpenRouter models More gpt-5.3-chat family models

OpenAI: GPT-5.3 Chat is listed under OpenRouter in LLM Directory with pricing, context limits, modalities, and capability metadata for quick comparison.

Reasoning: No Tool use: Yes

Overview

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Provider: OpenRouter
Family: gpt-5.3-chat
Release date: 2026-03-03
Last updated: —
Input modalities: text, image, file
Output modalities: text

Pricing and Limits

Token pricing

Input: $1.75/1M
Output: $14/1M
Cached input: N/A

Context and output

Context window: 128,000
Max output tokens: 16,384
Qualified ID: openrouter/openai/gpt-5.3-chat

Model Summary

OpenAI: GPT-5.3 Chat is a model listing in the OpenRouter provider catalog. It is categorized under the gpt-5.3-chat family.

The model supports text, image, file modalities across input/output paths. Reported context capacity is 128,000. Pricing is listed at $1.75/1M input and $14/1M output.

Same Family: gpt-5.3-chat

Comparable models in the same family across providers.

Browse family

Model	Provider	Context	Input	Output	Flags
GPT-5.3 Chat zenmux/openai/gpt-5.3-chat	Zenmux	128,000	$1.75/1M	$14/1M	Tools
GPT-5.3 Chat azure/gpt-5.3-chat	Azure	128,000	$1.75/1M	$14/1M	Reasoning Tools

OpenAI: GPT-5.3 Chat

Overview

Pricing and Limits

Token pricing

Context and output

Model Summary

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Same Family: gpt-5.3-chat