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From LongCat's own documentation (longcat.chat), quoted on this page. ModelClock rechecks it on every collection; last checked Oct 23, 2026.

LongCat · First-party API · LLM

LongCat-Flash-Omni-2603

Release announcedReleased on Mar 11, 2026

LongCat released LongCat-Flash-Omni-2603 on Mar 11, 2026. Source: longcat.chat · Last checked Oct 23, 2026

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Notice

Release announced

Released on Mar 11, 2026

LongCat announced this model on 2026-03-11.

Hosting route: First-party API
Affected scope: Not stated in the notice
Announced: Mar 11, 2026
First seen by ModelClock: Oct 15, 2026

What the provider published

longcat.chat ↗

LongCat-Flash-Omni-2603 is officially released.

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