ModelClock
Release announced
Released on Sep 29, 2026
Impossibl announced this model on 2026-09-29. joins the ai api.
- Hosting route
- Impossibl platform
- Affected scope
- joins the ai api
- Announced
- Sep 29, 2026
- First seen by ModelClock
- Oct 4, 2026
What the provider published
impossibl.com ↗sep 29, 2026
zai/glm-5.3-fast
new model
glm 5.3 fast joins the ai api. it is a faster serving tier over the same glm-5.3 weights.
Read from the provider's text; the quote is the provider's exact lines.