cURL

deprecatedmit

GLM-5.3 is Z.ai's latest flagship model, delivering comprehensive advancements in complex software engineering and agent capabilities. It uses the same base model as GLM-5.2, with all improvements driven by post-training. Compared with GLM-5.2, it delivers significantly stronger performance in complex programming and long-horizon tasks:

Context
128K
Max output
128K

Capabilities

Reasoning & Interaction
Reasoning
Tool Calling
Output Control
Structured Output
JSON Mode
Infrastructure
Streaming
Prompt Caching
Fine-tuning

Details

Provider Z.AI (Zhipu)
Creator zai
Family—
Licensemit
Statusdeprecated
Type—
Input modalitiestext
Output modalitiestext
Open weightYes
Parameters—
Architecture—
Context window128K tokens
Max input—
Max output128K tokens
Reasoning tokens—
Knowledge cutoff—
Release date—
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

API

GET/v1/models/zai/curl

cURL

deprecated

GLM-5.3 is Z.ai's latest flagship model, delivering comprehensive advancements in complex software engineering and agent capabilities. It uses the same base model as GLM-5.2, with all improvements driven by post-training. Compared with GLM-5.2, it delivers significantly stronger performance in complex programming and long-horizon tasks:

Changes · 5 entries
curlupdateca7a400Nov 2, 2026, 03:02 AM
page_urlhttps://docs.z.ai/guides/audio/glm-asr-2512→https://docs.z.ai/guides/llm/glm-5.3
modalitiesinput["audio"]→["text"]
capabilitiestool callyesstructured outputyesreasoningyesprompt cachingyesjson modeyes
descriptionGLM-5.3 is Z.ai's latest flagship model, delivering compr...
context_window128000
max_output_tokens128000
taglineGLM-5.2 is a flagship model built for the era of long-hor...
tools["function_calling"]
statusdeprecated
curlupdateb2f45bfOct 29, 2026, 03:29 AM
statusdeprecated
curlupdatee3d7dedAug 31, 2026, 04:13 AM
page_urlhttps://docs.z.ai/guides/llm/glm-5.2→https://docs.z.ai/guides/llm/glm-5.3
descriptionGLM-5.2 is a flagship model built for the era of long-hor...→GLM-5.3 is Z.ai's latest flagship model, delivering compr...
curlupdate3cddff5Aug 13, 2026, 02:54 AM
page_urlhttps://docs.z.ai/guides/audio/glm-asr-2512→https://docs.z.ai/guides/llm/glm-5.2
descriptionGLM-5.2 is a flagship model built for the era of long-hor...
context_window128000
max_output_tokens128000
taglineGLM-5.2 is a flagship model built for the era of long-hor...
tools["function_calling"]
curlcreate2b100acMar 23, 2026, 05:30 AM