Ox Alpha
stealth/ox-alpha · Undisclosed (stealth)Not yet established- Declared family
- Unknown
- Family attribution confidence
- Unknown
- Declared tokenizer tag
- Other
- Entered catalogue
- 20 August 2026
- Last tested
- 21 August 2026
- Measurement
- Measured
AI Desk · Model IdentityWithdrawn
Withdrawn from the catalogue
First absent from the snapshot of 3 September 2026Ox Alpha no longer appears in the OpenRouter catalogue. The record stays here because the measurements below were real when they were taken and this address has been published. A model leaving is the kind of change this product exists to notice, so it is kept rather than deleted.
Identity statement
Ox Alpha 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_7e146681 |
| Context and output | 1,048,576 context · 131,072 max output | declared |
| Reasoning contract | Mandatory · efforts max, high, low · default max | declared |
| Serving providers observed | Stealth | measured 21 August 2026 |
Shares this fingerprint
Exact signature first; template-boundary shifts of the same signature beneathZ.ai: GLM 4.7 Flashz-ai/glm-4.7-flashexact · 50/50Z.ai: GLM 5z-ai/glm-5exact · 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 stringsZ.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 5z-ai/glm-550/50 · 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: 87 prompt tokens.
The Ox Alpha case
The investigation this product grew from
Ox Alpha appeared on OpenRouter on 20 August 2026 as a stealth entry: no lab, no family, a cloaking system prompt, and a catalogue tag of Other. Two independent measurements were taken while it was live. Across the 418 models then listed, exactly three carried its complete API contract: Ox Alpha itself, GLM-5.3, and the GLM-latest alias. GLM-5.2 shares only two of the seven contract fields, so the contract appeared with the 5.3 generation rather than being a standing template.
The tokenizer measurement is the part a copied catalogue record cannot explain, because token counts come from the inference backend. Ox Alpha agreed with GLM-5.3 on all fifty adversarial strings. The load-bearing control is Kimi K3: it carries the same Other tag, so if OpenRouter fell back to a shared estimator for that tag, Kimi would have agreed on nearly every string too. It agreed on 16 of 49.
Ox accepts image and video input while public GLM-5.3 is text-only, and a shared tokenizer is family evidence, not a release identification. If an official identity is announced, this record keeps the prediction as it stood.
Against the alternatives
Fingerprint agreement with each candidate family's reference modelZ.ai: GLM 5.3z-ai/glm-5.3✓ 50/50 strings agreeMeta: Llama 3.3 70B Instructmeta-llama/llama-3.3-70b-instruct22/50 strings agreeOpenAI: GPT-5 Nanoopenai/gpt-5-nano18/50 strings agreeMoonshotAI: Kimi K3moonshotai/kimi-k316/49 strings agreeDeepSeek: DeepSeek V3deepseek/deepseek-chat15/50 strings agreeGoogle: Gemini 3.7 Flashgoogle/gemini-3.7-flash11/50 strings agree
One family agrees on every string; every alternative parts on most of them. Rows compare the mutually clean strings of each pair.
How far the evidence goes
| Supported | Not established by it |
|---|---|
| Z.ai family attribution, very high confidence | That Ox Alpha is the exact GLM-5.3 weights |
| An exact 50-string tokenizer match | Any statement from the maker |
| An identical API contract, unique to the 5.3 generation | Training-data provenance |
| Shared lineage with the GLM family | That no other explanation could exist |
Declared record
What the catalogue claims about this modelOx Alpha is a reasoning model designed for coding, sustained agentic work, and production workloads. It is suited for long-horizon software engineering, complex reasoning, and workflows that combine text with...
- Modalities
- text+image+video->text
- Declared tokenizer
- Other
- Prompt price
- $0 / M tokens
- Completion price
- $0 / M tokens
Supported parameters
include_reasoningmax_tokensreasoningreasoning_effortresponse_formattemperaturetool_choicetoolstop_ktop_p
defaults: {"temperature":1,"top_p":0.95}
History
Every observation, kept as taken- 20 August 2026Enters the OpenRouter catalogue with no declared family.
- 20 August 2026Fingerprinted during the Ox Alpha investigation · 50 of 50 strings measured clean.
- 21 August 2026Fingerprinted in the YFarmX catalogue sweep · 50 of 50 strings measured clean.
Cite this page as the evidence record for Ox Alpha: the URL is stable, measurements are dated, and revisions append to the history above. Method: tokenizer fingerprinting, v1, 50 strings.
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