OpenAI: GPT-5.3 Chat

OpenAI

GPT-5.3 Chat is an update to ChatGPT's most-used model that makes everyday conversations smoother, more useful, and more

Multimodal vision
TextVision
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Specifications

VendorOpenAI
Familyopenai
Context128K · 96k words（≈ a thesis）
Max output128K · 96k words（≈ a thesis）Below average
Released2026-06-19
Open sourceNo
Tool use—

Pricing across channels

per 1M tokens, USD

ChannelTypeInputOutput→
OpenRouter (auto)Aggregator$1.75$14.00visitAd
OpenRouter API (auto-fetched)· 2026-06-19

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