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GPT-5.5 Instant (May 2026)

Fast & cheapClosed weightsText

GPT-5.5 Instant family model by OpenAI.

May 2026

About the GPT-5.5 Instant family

The low-latency conversational variant of GPT-5.5, snapshot-dated (May/June 2026), tuned for fast everyday chat rather than deep reasoning.

All GPT-5.5 Instant models

How this one is configured

This configuration version/snapshot: May 2026.

Who makes it

OpenAIUnited StatesMaker of ChatGPT and the GPT and o-series model families.

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