How much does GLM 5.3 cost?

GLM 5.3 starts at $1.4/1M input tokens, $0.26/1M cached input tokens, and $4.4/1M output tokens.

What is the context window for GLM 5.3?

GLM 5.3 supports a context window of 1M tokens in Sim. In an agent, this determines how much conversation history, tool outputs, and retrieved documents the model can hold in a single call.

What capabilities does GLM 5.3 support?

GLM 5.3 supports the following capabilities in Sim: Temperature 0-1, Tool choice, Structured outputs, Reasoning low, high, max, Max output 131k.

What is GLM 5.3 best used for?

Best for reasoning-heavy tasks that need more deliberate model control. When used in a Sim workflow, it can be selected in any Agent block from the model picker.

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Z.ai model

GLM 5.3

Name: GLM 5.3
Brand: Z.ai
SKU: glm-5.3

GLM 5.3 is a Z.ai model tracked in Sim. It supports a 1M token context window. Pricing starts at $1.4/1M input tokens and $4.4/1M output tokens. Key capabilities include Temperature 0-1, Tool choice, Structured outputs. Best for reasoning-heavy tasks that need more deliberate model control.

Build with this model All Z.ai models

Input price$1.4/1M

Cached input$0.26/1M

Output price$4.4/1M

Context window1M

Max output131k tokens

ProviderZ.ai

UpdatedOct 7, 2026

Best forBest for reasoning-heavy tasks that need more deliberate model control.

Temperature0 to 1

Reasoning effortlow, high, max

VerbosityNot supported

Thinking levelsNot supported

Structured outputsSupported

Tool choiceSupported

Computer useNot supported

Deep researchNot supported

Memory supportSupported

Max output tokens131k

Frequently asked questions

GLM 5.3 is a Z.ai model available in Sim. GLM 5.3 is a Z.ai model tracked in Sim. It supports a 1M token context window. Pricing starts at $1.4/1M input tokens and $4.4/1M output tokens. Key capabilities include Temperature 0-1, Tool choice, Structured outputs.