ByteDance Seed: Seed-2.0-Lite

bytedance-seed/seed-2.0-lite · ByteDance SeedTokenizer lineage measured
Tokenizer group (measured)
ByteDance Seed
Evidence confidence
High
Why high: an exact fingerprint shared with 3 models.
Declared tokenizer tag
Other
Entered catalogue
10 March 2026
Last tested
21 August 2026
Measurement
Measured
Evidence
  • exact tokenizer signature shared with 3 models

Identity statement

ByteDance Seed: Seed-2.0-Lite is ByteDance Seed's model, and its measured tokenizer sits in ByteDance Seed's own signature group alongside its sibling models. No other maker's measured model shares it so far.

Evidence stack

Signals of different kinds, weighed together
SignalResultReference
Tokenizer signatureExact match with 3 other modelstk_25bf52d0
API surfaceNo other entry shares this exact contractapi_357315b3
Context and output262,144 context · 131,072 max outputdeclared
Reasoning contractOptional · efforts high, medium, low, minimal · default mediumdeclared
Serving providers observedSeedmeasured 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-long16
spaces-203
spaces-603
tabs-204
newlines-204
mixed-ws7

Digits

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

CJK

zh-common11
zh-long13
zh-rare18
ja-kana18
ja-kanji13
ko13

Other scripts

ru13
ar12
he13
hi17
th16
el14

Emoji

emoji-basic9
emoji-skin14
emoji-zwj-family11
emoji-zwj-x333
emoji-flags16
emoji-prof19

Rare Unicode

math30
boxdraw29
combining5
cjk-ext-b16
surrogates41
zalgo36
rtl-mix6

Code

py-code26
py-indent18
json25
html16
regex50
camel7
snake8

Repetition and encodings

rare-word-x531
repeat-tok41
base6433
hex19
url20
uuid36

An x marks a row excluded as corrupt (caching or provider interference detected during measurement). Overhead subtracted: 48 prompt tokens.

Declared record

What the catalogue claims about this model

Seed-2.0-Lite is a versatile, cost‑efficient enterprise workhorse that delivers strong multimodal and agent capabilities while offering noticeably lower latency, making it a practical default choice for most production workloads across...

Modalities
text+image+video->text
Declared tokenizer
Other
Prompt price
$0.25 / M tokens
Completion price
$2.00 / M tokens

Supported parameters

frequency_penaltyinclude_reasoningmax_tokensreasoningreasoning_effortresponse_formatstopstructured_outputstemperaturetool_choicetoolstop_p

defaults: {"temperature":null,"top_p":null,"top_k":null,"frequency_penalty":null,"presence_penalty":null,"repetition_penalty":null}

Catalogue entry

History

Every observation, kept as taken
  • 10 March 2026Enters the OpenRouter catalogue with no declared family.
  • 21 August 2026Fingerprinted in the YFarmX catalogue sweep · 50 of 50 strings measured clean.
  • 21 August 2026YFarmX assessment: consistent with the ByteDance Seed family, high confidence.

Cite this page as the evidence record for ByteDance Seed: Seed-2.0-Lite: 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.