Zenmux

GPT-5.3 Chat

Name: GPT-5.3 Chat
Brand: Zenmux

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

More Zenmux models More gpt-5.3-chat family models

Chat-tuned GPT model for conversational assistance, writing, and tool workflows

Reasoning: No Tool use: Yes

Overview

text

Provider: Zenmux
Family: gpt-5.3-chat
Release date: 2026-03-20
Last updated: 2026-03-20
Input modalities: text
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: 16,380
Qualified ID: zenmux/openai/gpt-5.3-chat

Model Summary

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

The model supports text 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 azure/gpt-5.3-chat	Azure	128,000	$1.75/1M	$14/1M	Reasoning Tools
OpenAI: GPT-5.3 Chat openrouter/openai/gpt-5.3-chat	OpenRouter	128,000	$1.75/1M	$14/1M	Tools

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