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AI Desk · AI Fingerprinting · Compare

IBM: Granite 4.0 Micro · IBM: Granite 4.2 8B

Identity similarity: lowDivergent fingerprints · 35/50These models tokenise differently. The rows that part here are the whitespace, digit, non-Latin script and English prose strings. Divergence on high-information strings separates unrelated vocabularies within a handful of samples.

IBM: Granite 4.0 Micro recordIBM: Granite 4.2 8B recordOpen in the interactive bench

Tokenizer fingerprint

35 of 50 mutually clean strings agree
Test stringIBM: Granite 4.0 MicroIBM: Granite 4.2 8BVerdict
en-prose1414match
en-long1616match
spaces-2033match
spaces-6033match
tabs-2034differs
newlines-2045differs
mixed-ws55match
digits-933match
digits-1245differs
digits-301015differs
digits-sep77match
float-long910differs
zh-common1818match
zh-long2525match
zh-rare2323match
ja-kana1414match
ja-kanji1717match
ko1919match
ru1616match
ar2525match
he2424match
hi3235differs
th2526differs
el2929match
emoji-basic1010match
emoji-skin3030match
emoji-zwj-family1818match
emoji-zwj-x35454match
emoji-flags2424match
emoji-prof2929match
math3232match
boxdraw2828match
combining1414match
cjk-ext-b1313match
surrogates4039differs
zalgo3636match
rtl-mix1111match
py-code2528differs
py-indent1518differs
json2023differs
html1617differs
regex4447differs
camel55match
snake611differs
rare-word-x53131match
repeat-tok2222match
base643535match
hex1111match
url1721differs
uuid2727match

Values are the marginal prompt-token cost of each string with the model's fixed overhead subtracted. An x marks a row excluded as corrupt for that model.

API surface

The declared serving contracts differ
FieldIBM: Granite 4.0 MicroIBM: Granite 4.2 8BVerdict
Context length131000131072× differs
Max output tokens––✓ match
Supported parametersfrequency_penalty, logit_bias, logprobs, max_tokens, min_p, presence_penalty, repetition_penalty, response_format, seed, stop, temperature, top_k, top_logprobs, top_pfrequency_penalty, include_reasoning, logit_bias, logprobs, max_tokens, min_p, presence_penalty, reasoning, reasoning_effort, repetition_penalty, response_format, seed, stop, structured_outputs, temperature, tool_choice, tools, top_k, top_logprobs, top_p× differs
Defaults{"temperature":null,"top_p":null,"frequency_penalty":null}{"temperature":1,"top_p":0.95}× differs
Reasoning contract–{"mandatory":false,"default_enabled":true,"supported_efforts":["high","low","none"],"default_effort":"high"}× differs
Modalitiestext->texttext->text✓ match

IBM: Granite 4.0 Micro: OpenRouter's listing shows 117,900 output tokens, which is 90% of the context window, the figure it carries where the provider declares no maximum. IBM: Granite 4.2 8B: OpenRouter's listing shows 117,964 output tokens, which is 90% of the context window, the figure it carries where the provider declares no maximum.

Method: tokenizer fingerprinting, v1, 50 strings. This page is static and dated; the interactive bench compares any two of the 338 measured models.