CometAPI Update: Model Retirement and Replacement Summary

[cometapi-announcer[bot]]

2026-09-22

View model details

The models below are being retired upstream and will be shut down on the dates listed. No automatic migration will be performed — please migrate to the recommended replacement models before the shutdown dates to avoid service interruptions.

Model	Series	Date	Replaced By
seedance-1-5-pro-251215	Seedance Series	After 17:00 on November 11, 2026 (UTC+8)	seedance-2-5
Gemini 2.5 Pro & Flash Series	Gemini Series	October 20, 2026	gemini-3.8-flash

Seedance 1.5 Pro

The seedance-1-5-pro-251215 model will be shut down after 17:00 on November 11, 2026 (UTC+8) due to its retirement by Volcano Engine and will not be automatically migrated to a new model.

CometAPI recommends migrating to seedance-2-5, the latest Seedance model currently available on CometAPI.

Gemini 2.5 Pro & Flash Series

Google has announced the retirement of the Gemini 2.5 Pro and Flash series. The affected models are scheduled for retirement on October 20, 2026.

CometAPI recommends migrating to gemini-3.8-flash, the latest Gemini text model currently available on CometAPI.

Developer Documentation

• Seedance 2.5 API
• Chat API Guide
• View model details