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by Zhipu AI

Z.ai: GLM 5.3 Prime.

text closed 1M ctx
Cheapest input
$2.8/M
on OpenRouter
Cheapest output
$8.8/M
on OpenRouter
Hosted equiv.
~$3.17/hr
@ 100 tok/s on OpenRouter

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.

Hosted API only

No self-host path — closed weights.

Z.ai: GLM 5.3 Prime's weights aren't published. Use it via the access providers below.

Where to use it

Cheapest hosted endpoints.

Provider Access $/M in $/M out
OpenRouter api aggregator $2.8 $8.8 Launch ↗
FAQ

Frequently asked.

How do I run Z.ai: GLM 5.3 Prime?
Z.ai: GLM 5.3 Prime is a closed-source API model. The cheapest way to access it is through the API providers listed on this page (direct API, aggregators, and hosted chat UIs).
Where can I access Z.ai: GLM 5.3 Prime?
Z.ai: GLM 5.3 Prime is available via OpenRouter. Each access option lists its own pricing (per million tokens or hourly hosting).
How much does it cost to run Z.ai: GLM 5.3 Prime?
API pricing starts at $2.8/M input tokens and $8.8/M output tokens. Self-hosting cost depends on the GPU you rent — see the Run It Yourself tab.
Is Z.ai: GLM 5.3 Prime open-source or proprietary?
Z.ai: GLM 5.3 Prime is a proprietary model from Zhipu AI. Access is API-only — there are no public weights to download.