z-ai/glm-5.3-primeThe quickest way is through an API gateway such as OpenRouter, which uses the same format as the OpenAI API. Create a key, then send a request with the model ID z-ai/glm-5.3-prime:
Prefer no code? Many tools in our AI tools directory run on models like this one.
GLM-5.3-Prime is the high-speed variant of Z.ai's GLM-5.3, inheriting its full capabilities while delivering 1.5–2× the output throughput through inference acceleration. It supports text input and output with a 1M-token...
Z.ai: GLM 5.3 Prime can read up to 1,000,000 tokens in one request, roughly 750,000 words.
Through OpenRouter, Z.ai: GLM 5.3 Prime costs about $2.80 / 1M tokens for input and $8.80 / 1M tokens for output. Prices change, so check before large jobs.
Z.ai: GLM 5.3 Prime does not have downloadable weights. You use it through Z Ai or an API provider.
Z.ai: GLM 5.3 Prime accepts text and produces text.
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Specs and prices come from OpenRouter and the provider, and are refreshed daily. Last checked 23 Sep 2026.