GPT-5.5 Instant

✅ Active

Default ChatGPT model optimized for fast, accurate, concise everyday assistance and personalization

Provider list prices

Context Window

128K

Input Price

N/A/1M

Available in the API through the chat-latest alias

Output Price

N/A/1M

Released

May 5, 2026

Capabilities

textvisionweb-searchpersonalizationfunction-calling

Crazyrouter API catalogue

Not confirmed in the current default-group API catalogue.

Catalogue checked: 2026-10-10T14:22:39+00:00. USD per 1M tokens, default group. The first context tier is shown; long contexts may cost more. This is a gateway catalogue snapshot, not a provider release announcement.

Get API Access →Current API models

Version History

May 28, 2026Update

Updated in ChatGPT and the API for more natural, better-paced responses with fewer overly long or bullet-heavy answers

May 5, 2026New Release

GPT-5.5 Instant rolled out as ChatGPT's default model for all users and as chat-latest in the API, replacing GPT-5.3 Instant