Model by Zhipu AI (Z.ai)

GLM 5.3 Prime

GLM 5.3 Prime is the high-speed variant of Z.ai's GLM-5.3.

Checked 2026-11-05

GLM 5.3 Prime is the high-speed variant of Z.ai's GLM-5.3. OpenRouter says it keeps the full capabilities of GLM-5.3 and delivers 1.5 to 2 times the output speed through faster inference. It was listed on 23 September 2026. It takes text and returns text, with a 1,000,000-token context window. On 5 November 2026 the price is $2.80 per million input tokens and $8.80 per million output. You pay for the speed, so it makes sense for live, user-facing agents and less so for overnight batch jobs. The limit is that it is text only, with no image or video input, unlike its sibling GLM 5.3 FlashX. Our draft marked it closed, and OpenRouter links no public weights, but we did not find a Z.ai page that describes Prime or states a licence. Treat the maker-side details as unconfirmed. You reach it through OpenRouter. Figures come from OpenRouter's public model list and model page only; we have not run it.

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Questions

What is the context window of GLM 5.3 Prime?

1,000,000 tokens, with up to 131,072 tokens of output.

How much does GLM 5.3 Prime cost?

$2.8 per million input tokens and $8.8 per million output tokens, checked 31 October 2026.

Can I run GLM 5.3 Prime on my own hardware?

No. The weights are not published, so you use it through the maker's API or a hosting provider.

Who makes GLM 5.3 Prime?

Zhipu AI (Z.ai) makes it, and released it on 23 September 2026.

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