ModelClock
API availability
Available in the API since Sep 22, 2026
Fireworks AI announced API availability for this model on 2026-09-22. Serverless Training pool
This date applies to API availability. Rollouts in consumer products or other hosting routes can happen on different dates.
- Hosting route
- Fireworks AI platform
- Affected scope
- Serverless Training pool
- Announced
- Sep 22, 2026
- First seen by ModelClock
- Oct 7, 2026
What the provider published
docs.fireworks.ai ↗ New Serverless Training model: GLM 5.3 Flash
GLM 5.3 Flash is now available for LoRA workloads on the shared Serverless Training pool, with up to 200K context and both text and vision inputs. See the Serverless Training guide for setup and the training model catalog for current availability.
Read from the provider's text; the quote is the provider's exact lines.
