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Z.ai · API model

GLM 5.3

GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks. It supports text input and output with a 1M-token context window, and improves...

Context
1.05M
Input / 1M
$0.08
Output / 1M
$3.6
Released
Aug 18, 2026
Specifications

GLM 5.3 specs

Provider
Z.ai
Type
API model
Model ID
z-ai/glm-5.3
Context window
1,048,576 tokens1.05M
Input price
$0.08per 1M input tokens
Output price
$3.6per 1M output tokens
Accepts
text
Produces
text
Released
Aug 18, 2026
Popularity
42/100position #12 in OpenRouter's weekly usage ranking
Source
OpenRouter
Overview

About GLM 5.3

GLM 5.3 is an API model from Z.ai, released on Aug 18, 2026, with a context window of 1,048,576 tokens, pricing of $0.08 per million input tokens and $3.6 per million output tokens. It accepts text input and produces text output.

At listed prices, a request with 10,000 input tokens and 1,000 output tokens costs about $0.0044.

Specs are sourced from OpenRouter and were last checked on Nov 3, 2026. Always confirm current pricing and limits with the provider before production use.

Tool callingStructured outputsJSON modeReasoning
FAQ

GLM 5.3 questions

What is the context window of GLM 5.3?

GLM 5.3 supports a context window of 1,048,576 tokens.

How much does GLM 5.3 cost?

GLM 5.3 is listed at $0.08 per million input tokens and $3.6 per million output tokens on OpenRouter.

When was GLM 5.3 released?

GLM 5.3 was published on Aug 18, 2026.

What inputs does GLM 5.3 accept?

GLM 5.3 accepts text input and produces text output.