GPT-5.3 Instant · model releaseGPT-5.3 Instant

validasserted

Valid from: 2026-03-03
Valid until: still holds
Published: 2026-03-03
Recorded by AsOf: 2026-11-04
Checked: 2026-11-04 · its source page states the value and the date
Confidence: 0.95

Sources

“Mar 3 Feature gpt-5.3-chat-latest v1/chat/completions v1/responses Released gpt-5.3-chat-latest to the Chat Completions and Responses API. This model points to the GPT-5.3 Instant snapshot currently used in ChatGPT.”— what the page says, read 2026-11-04

OpenAI API changelog, March 3, 2026primary · developers.openai.com · 2026-03-03

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