Z.ai: GLM 5
z-ai/glm-5 · Z.aiNot yet established- Declared family
- Unknown
- Evidence confidence
- Unknown
- Declared tokenizer tag
- Other
- Entered catalogue
- 11 February 2026
- Last tested
- 3 September 2026
- Measurement
- Measured
Identity statement
Z.ai: GLM 5 has a clean measured fingerprint that currently sits alone: no other measured model shares its signature.
Evidence stack
Signals of different kinds, weighed together| Signal | Result | Reference |
|---|---|---|
| Tokenizer signature | Exact match with 6 other models | tk_133b086c |
| API surface | No other entry shares this exact contract | api_13a8202e |
| Context and output | 204,800 context · 128,000 max output | declared |
| Reasoning contract | Optional | declared |
| Serving providers observed | Venice | measured 3 September 2026 |
Shares this fingerprint
Exact signature first; template-boundary shifts of the same signature beneathOx Alphastealth/ox-alphaexact · 50/50Z.ai: GLM 4.7 Flashz-ai/glm-4.7-flashexact · 50/50Z.ai: GLM 5 Turboz-ai/glm-5-turboexact · 50/50Z.ai: GLM 5.1z-ai/glm-5.1exact · 50/50Z.ai: GLM 5.3z-ai/glm-5.3exact · 50/50Z.ai: GLM 5.3 Flashz-ai/glm-5.3-flashexact · 50/50Z.ai: GLM 5.2z-ai/glm-5.2same tokenizer · template shiftAionLabs: Aion-3.0aion-labs/aion-3.0same tokenizer · template shift
Closest measured models
Agreement across the mutually clean test stringsOx Alphastealth/ox-alpha50/50 · 100%Z.ai: GLM 5.3z-ai/glm-5.350/50 · 100%Z.ai: GLM 4.7 Flashz-ai/glm-4.7-flash50/50 · 100%Z.ai: GLM 5.1z-ai/glm-5.150/50 · 100%Z.ai: GLM 5 Turboz-ai/glm-5-turbo50/50 · 100%Z.ai: GLM 5.3 Flashz-ai/glm-5.3-flash50/50 · 100%
Click a row to open the full comparison.
The measured fingerprint
Marginal prompt-token cost of each test string, grouped by scriptAll 50 rows
English and whitespace
en-prose14
en-long16
spaces-203
spaces-603
tabs-203
newlines-204
mixed-ws5
Digits
digits-95
digits-127
digits-3010
digits-sep9
float-long14
CJK
zh-common9
zh-long10
zh-rare18
ja-kana10
ja-kanji14
ko17
Other scripts
ru13
ar13
he24
hi27
th24
el14
Emoji
emoji-basic5
emoji-skin10
emoji-zwj-family7
emoji-zwj-x321
emoji-flags24
emoji-prof15
Rare Unicode
math27
boxdraw28
combining10
cjk-ext-b13
surrogates40
zalgo22
rtl-mix8
Code
py-code25
py-indent15
json21
html16
regex44
camel5
snake6
Repetition and encodings
rare-word-x531
repeat-tok22
base6435
hex14
url17
uuid28
An x marks a row excluded as corrupt (caching or provider interference detected during measurement). Overhead subtracted: 5 prompt tokens.
Declared record
What the catalogue claims about this modelGLM-5 is Z.ai’s flagship open-source foundation model engineered for complex systems design and long-horizon agent workflows. Built for expert developers, it delivers production-grade performance on large-scale programming tasks, rivaling leading...
- Modalities
- text->text
- Declared tokenizer
- Other
- Prompt price
- $0.60 / M tokens
- Completion price
- $1.92 / M tokens
Supported parameters
frequency_penaltyinclude_reasoninglogprobsmax_tokenspresence_penaltyreasoningrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_p
defaults: {"temperature":1,"top_p":0.95,"frequency_penalty":null}
History
Every observation, kept as taken- 11 February 2026Enters the OpenRouter catalogue with no declared family.
- 3 September 2026Fingerprinted in the YFarmX catalogue sweep · 50 of 50 strings measured clean.
Cite this page as the evidence record for Z.ai: GLM 5: the URL is stable, measurements are dated, and revisions append to the history above. Method: tokenizer fingerprinting, v1, 50 strings.
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