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Z.ai: GLM 5.3 Prime API Pricing

Z.ai: GLM 5.3 Prime is an API model from z-ai. It costs $2.8 per 1M input tokens and $8.8 per 1M output tokens, with cached input at $0.56. Its context window is 1,000,000 tokens with up to 131,072 output tokens. A workload of 10M input + 2M output tokens costs about $45.6 per month.
Input
$2.8
per 1M tokens
Output
$8.8
per 1M tokens
Cached input
$0.56
per 1M tokens
Context window
1M
1,000,000 tokens
Blended (80/20)
$4
per 1M tokens

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...

How much does Z.ai: GLM 5.3 Prime cost for a real workload?

At 10M input + 2M output tokens per month, Z.ai: GLM 5.3 Prime costs about $45.6 ($28 input + $17.6 output). Try your own volumes in the cost calculator.

What are cheaper alternatives to Z.ai: GLM 5.3 Prime?

Compare Z.ai: GLM 5.3 Prime with other models

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Frequently asked questions

How much does Z.ai: GLM 5.3 Prime cost?

Z.ai: GLM 5.3 Prime costs $2.8 per 1M input tokens and $8.8 per 1M output tokens (list price, snapshot October 21, 2026). At 10M input + 2M output tokens per month that is about $45.6.

What is the context window of Z.ai: GLM 5.3 Prime?

Z.ai: GLM 5.3 Prime has a context window of 1,000,000 tokens and can return up to 131,072 output tokens per response.

What are cheaper alternatives to Z.ai: GLM 5.3 Prime?

Cheaper models include OpenAI: GPT-5.1-Codex-Max ($1.25 in / $10 out), OpenAI: GPT-5.1 ($1.25 in / $10 out), OpenAI: GPT-5.1-Codex ($1.25 in / $10 out). See the full list on this page.

Is Z.ai: GLM 5.3 Prime free to use?

No. Z.ai: GLM 5.3 Prime is a paid model at $2.8 input / $8.8 output per 1M tokens. 20 free models are listed on the free models page.

Provider: z-ai · Model ID: z-ai/glm-5.3-prime · Modality: text->text · Price snapshot October 21, 2026, refreshed daily. How we collect prices