Meta: Llama 4 Maverick

meta-llama/llama-4-maverick · MetaDeclared and measured agree
Tokenizer lineage (measured)
Llama4
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.
Declared tokenizer tag
Llama4
Entered catalogue
5 April 2025
Last tested
21 August 2026
Measurement
Measured
Evidence
  • exact tokenizer signature shared with 1 model

Identity statement

Meta: Llama 4 Maverick is Meta's model. Its measured tokenizer sits with the Llama4 group, which is evidence that it builds on the Llama4 tokenizer. Tokenizer reuse is normal engineering, open vocabularies travel between labs, and this says nothing against Meta's authorship of the model itself.

Evidence stack

Signals of different kinds, weighed together
SignalResultReference
Tokenizer signatureExact match with 1 other modeltk_59e2520c
API surfaceNo other entry shares this exact contractapi_e8779679
Context and output1,048,576 context · 16,384 max outputdeclared
Reasoning contractNone declareddeclared
Serving providers observedDeepInframeasured 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

Marginal prompt-token cost of each test string, grouped by script
All 50 rows

English and whitespace

en-prose14
en-long17
spaces-203
spaces-603
tabs-203
newlines-204
mixed-ws6

Digits

digits-93
digits-124
digits-3010
digits-sep7
float-long9

CJK

zh-common11
zh-long12
zh-rare18
ja-kana9
ja-kanji12
ko10

Other scripts

ru10
ar11
he10
hi12
th8
el14

Emoji

emoji-basic10
emoji-skin20
emoji-zwj-family11
emoji-zwj-x333
emoji-flags16
emoji-prof19

Rare Unicode

math24
boxdraw21
combining10
cjk-ext-b16
surrogates37
zalgo31
rtl-mix6

Code

py-code25
py-indent15
json20
html16
regex42
camel6
snake6

Repetition and encodings

rare-word-x530
repeat-tok40
base6435
hex11
url17
uuid27

An x marks a row excluded as corrupt (caching or provider interference detected during measurement). Overhead subtracted: 10 prompt tokens.

Declared record

What the catalogue claims about this model

Llama 4 Maverick 17B Instruct (128E) is a high-capacity multimodal language model from Meta, built on a mixture-of-experts (MoE) architecture with 128 experts and 17 billion active parameters per forward...

Modalities
text+image->text
Declared tokenizer
Llama4
Prompt price
$0.20 / M tokens
Completion price
$0.80 / M tokens

Supported parameters

frequency_penaltylogit_biaslogprobsmax_tokensmin_ppresence_penaltyrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_p

defaults: {}

Catalogue entryWeights on Hugging Face

History

Every observation, kept as taken
  • 5 April 2025Enters the OpenRouter catalogue declared as Llama4.
  • 21 August 2026Fingerprinted in the YFarmX catalogue sweep · 50 of 50 strings measured clean.
  • 21 August 2026YFarmX assessment: consistent with the Llama4 family, high confidence.

Cite this page as the evidence record for Meta: Llama 4 Maverick: the URL is stable, measurements are dated, and revisions append to the history above. Method: tokenizer fingerprinting, v1, 50 strings. The raw data behind every figure is on the data page.