Why high: inherited from z-ai/glm-5.3: a serving variant shares its base model's tokenizer.
This entry is a serving variant of Z.ai: GLM 5.3. A variant shares its base model's tokenizer by construction, so the measurement lives on the base record and this page inherits it.
Z.ai: GLM 5.3 (batch) is Z.ai's model, and its measured tokenizer sits in Z.ai's own signature group alongside its sibling models. No other maker's measured model shares it so far.
| We checked | What we found | Where it came from |
|---|---|---|
| How it counts tokens | Not measured yet | we measured it |
| How its API is set up | Set up identically to 1 other listing, field for field | api_3d31d457 |
| How much it can read and write | Reads up to 1,048,576 tokens at once, writes up to 131,072 | its own listing |
| Whether it thinks before answering | Always reasons, and cannot be turned off, at max, high, low, max by default | its own listing |
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...
Supported parameters
frequency_penaltyinclude_reasoninglogit_biasmax_tokensmin_ppresence_penaltyreasoningreasoning_effortrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_p
defaults: {"temperature":1,"top_p":0.95}
