DEEP REASONING · Z.ai

GLM 5.3 Prime

GLM 5.3 Prime is a reasoning, tool-using model from Z.ai in the GLM family, living in The High Peaks (deep reasoning). It reads text and writes text, with a 1M-token context window and up to 131K tokens of output. On OpenRouter it costs $2.80 per million input tokens and $8.80 per million output tokens.

See GLM 5.3 Prime in 3D Open in the Worktable View on OpenRouter

Specifications

Provider: Z.ai
Family: GLM
Province: The High Peaks
Context window: 1M tokens
Maximum output: 131K tokens
Input / 1M tokens: $2.80
Output / 1M tokens: $8.80
Accepts: text
Produces: text
Reasoning: Yes
Tool use: Yes
Added to OpenRouter: 2026-09-23
Model ID: z-ai/glm-5.3-prime
Price history: —All recorded prices

From the 2026-10-24 catalog snapshot. Prices are US dollars per million tokens.

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