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MythoMax 13B

gryphe/mythomax-l2-13b · GrypheDeclared and measured agree
Tokenizer lineage (measured)
Llama2
Declared tokenizer tag
Llama2
Entered catalogue
2 July 2023
Last tested
21 August 2026
Evidence confidence
High

Why high: an exact fingerprint shared with 1 model that declares the same family, without a second signal of a different kind yet.

Evidence
  • ✓ exact tokenizer signature shared with 1 model
Compare with ReMM SLERP 13B

Identity statement

MythoMax 13B is Gryphe's model. Its measured tokenizer sits with the Llama2 group, which is evidence that it builds on the Llama2 tokenizer. Tokenizer reuse is normal engineering, open vocabularies travel between labs, and this says nothing against Gryphe's authorship of the model itself.

What we checked

Four different kinds of evidence, and what each one showed
We checkedWhat we foundWhere it came from
How it counts tokensCounts every one of the 50 test strings exactly like 1 other modeltk_5348f9f6
How its API is set upA combination of settings no other listing in the catalogue usesapi_b740771a
How much it can read and writeReads up to 8,192 tokens at once, writes up to 3,686its own listing
Who served our requestsParasailwe measured it, 21 August 2026

Shares this fingerprint

Exact signature first; template-boundary shifts of the same signature beneath

Closest measured models

Agreement across the mutually clean test strings

Click a row to open the full comparison.

The measured fingerprint

What each test string cost this model, in tokens

We sent MythoMax 13B fifty short pieces of text and recorded what each one cost it in tokens. The bars below are those costs. Two models built on the same tokenizer produce the same bars; a model built on a different one produces a different set, which is what makes this a fingerprint.

All 50 rows

English and whitespace

en-prose16
en-long18
spaces-204
spaces-606
tabs-2022
newlines-2022
mixed-ws9

Digits

digits-99
digits-1212
digits-3030
digits-sep12
float-long22

CJK

zh-common22
zh-long34
zh-rare27
ja-kana16
ja-kanji16
ko29

Other scripts

ru14
ar29
he26
hi31
th26
el33

Emoji

emoji-basic20
emoji-skin40
emoji-zwj-family19
emoji-zwj-x357
emoji-flags32
emoji-prof35

Rare Unicode

math26
boxdraw17
combining10
cjk-ext-b16
surrogates54
zalgo35
rtl-mix13

Code

py-code28
py-indent19
json28
html17
regex52
camel8
snake12

Repetition and encodings

rare-word-x546
repeat-tok41
base6441
hex20
url23
uuid36

Overhead subtracted: 36 prompt tokens.

Declared record

What the catalogue claims about this model

One of the highest performing and most popular fine-tunes of Llama 2 13B, with rich descriptions and roleplay. #merge

Modalities
text->text
Declared tokenizer
Llama2
Prompt price
$0.08 / M tokens
Completion price
$0.11 / M tokens

Supported parameters

frequency_penaltylogit_biaslogprobsmax_tokensmin_ppresence_penaltyrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetop_atop_ktop_logprobstop_p

defaults: {}

Catalogue entryWeights on Hugging Face

History

Every observation, kept as taken
  • 2 July 2023Enters the OpenRouter catalogue declared as Llama2.
  • 21 August 2026Fingerprinted in the YFarmX catalogue sweep · 50 of 50 strings measured clean.
  • 21 August 2026YFarmX assessment: consistent with the Llama2 family, high confidence.