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MoonshotAI: Kimi K2.7 Code

moonshotai/kimi-k2.7-code · Moonshot AITokenizer lineage measured
Tokenizer group (measured)
Moonshot AI
Entered catalogue
12 June 2026
Last tested
5 October 2026
Evidence confidence
High

Why high: an exact fingerprint shared with 4 models.

Evidence
  • ✓ exact tokenizer signature shared with 4 models

Identity statement

MoonshotAI: Kimi K2.7 Code is Moonshot AI's model, and its measured tokenizer sits in Moonshot AI's own signature group alongside its sibling models. Measured models from Fireworks carry the same vocabulary, which reads as reuse of Moonshot AI's tokenizer line and questions nobody's authorship; they are listed under "Shares this fingerprint" below.

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 4 other modelstk_ea6068bf
How its API is set upA combination of settings no other listing in the catalogue usesapi_82054774
How much it can read and writeReads up to 262,144 tokens at onceOpenRouter's listing shows 235,929 output tokens, which is 90% of the context window, the figure it carries where the provider declares no maximum.its own listing
Whether it thinks before answeringAlways reasons, and cannot be turned offits own listing
Who served our requestsStreamLakewe measured it, 5 October 2026
Measured twiceThe 5 October 2026 reading agreed with the 3 September 2026 reading on every one of the 50 strings clean in both: the tokenizer behind this name held.50/50 agree

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 MoonshotAI: Kimi K2.7 Code 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-prose14
en-long16
spaces-203
spaces-603
tabs-204
newlines-204
mixed-ws6

Digits

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

CJK

zh-common9
zh-long10
zh-rare18
ja-kana11
ja-kanji14
ko13

Other scripts

ru16
ar15
he16
hi17
th21
el22

Emoji

emoji-basic10
emoji-skin20
emoji-zwj-family11
emoji-zwj-x333
emoji-flags14
emoji-prof20

Rare Unicode

math26
boxdraw24
combining14
cjk-ext-b16
surrogates31
zalgo36
rtl-mix8

Code

py-code25
py-indent15
json20
html16
regex43
camel6
snake6

Repetition and encodings

rare-word-x531
repeat-tok41
base6433
hex11
url17
uuid27

Overhead subtracted: 7 prompt tokens.

Declared record

What the catalogue claims about this model

MoonshotAI: Kimi K2.7 Code is a coding-focused model in Moonshot AI's Kimi K2 family, built to complete end-to-end programming tasks reliably over long contexts. It uses a native multimodal mixture-of-experts...

Modalities
text+image->text
Declared tokenizer
Other
Prompt price
$0.67 / M tokens
Completion price
$3.35 / M tokens

Supported parameters

frequency_penaltyinclude_reasoninglogit_biaslogprobsmax_tokensmin_pparallel_tool_callspresence_penaltyreasoningrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_p

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

Catalogue entryWeights on Hugging Face

History

Every observation, kept as taken
  • 12 June 2026Enters the OpenRouter catalogue with no declared family.
  • 3 September 2026Fingerprinted in the YFarmX catalogue sweep · 50 of 50 strings measured clean.
  • 5 October 2026Fingerprinted again, to check the reading held · 50 of 50 strings measured clean.
  • 5 October 2026YFarmX assessment: consistent with the Moonshot AI family, high confidence.