Commercial transition
Previous stateAI Gateway callers used the standard GLM-5.3 model ID at provider rates without the newly announced DigitalOcean-specific promotional route.
→New stateThe zai/glm-5.3-promo-50 ID routes only to DigitalOcean at 50% off through 8 September 2026, has no provider fallback and stops serving when the offer ends; the standard ID continues at usual provider rates.
Who is affected
Developers and teams routing GLM-5.3 requests through Vercel AI Gateway during the limited DigitalOcean promotion.
Action required
Use the promotional ID only for the offer window, avoid hard-coding it, and switch to the standard zai/glm-5.3 ID with deliberate provider options before the promo endpoint stops.
Evidence boundary
The 50% discount applies only to the named promotional ID and DigitalOcean route during the stated window. It does not discount the standard ID, add fallback to the promo route or guarantee provider availability.
Timeline
- DigitalOcean promotion announced
Vercel introduced the DigitalOcean-only 50%-off model ID.
- Offer ends
The promotional ID stops serving; the standard model ID remains available at usual provider rates.
Official sources
- GLM-5.3 is 50% off through DigitalOcean on AI GatewayVercel · 2026-09-02 · Official discount, routing, fallback and end-of-offer authority