Z.ai opens GLM-5.3 API access and keeps token pricing at GLM-5.2 levels
Z.ai has made its GLM-5.3 model available through an API, giving developers programmatic access to the newly released model for agents and applications. According to the report, pricing remains unchanged from GLM-5.2 at $1.40 per million input tokens and $4.40 per million output tokens, with lower cached-input pricing and free cached-input storage listed for a limited time.
Why it matters: This is a meaningful model-launch follow-through because API availability, not just announcement, determines whether developers can actually test and deploy a new model in production. Keeping prices flat while claiming stronger coding and long-horizon agent performance could make GLM-5.3 a more competitive price-performance option and add pressure in the market for lower-cost frontier model inference.
Sources
- GLM-5.3 hits the API at $1.4/$4.4 per million tokens VentureBeat · August 19, 2026
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