IBM: Granite 4.0 Micro is IBM's model. Its measured tokenizer sits with the OpenAI cl100k group, which is evidence that it builds on the OpenAI cl100k tokenizer. Tokenizer reuse is normal engineering, open vocabularies travel between labs, and this says nothing against IBM's authorship of the model itself.
cl100k_base is an open vocabulary table anyone can build on. Sharing it says which dictionary the model reads with, and nothing about who made the model.
Granite 4.0's endpoint counts match OpenAI's open cl100k_base encoding on all 50 strings, and its repository declares the matching 100,352-entry vocabulary. Microsoft's Phi-4 measures identically, which is why two rival labs share one signature group: both adopted the tokenizer OpenAI released as open source with tiktoken.
Granite 4.0 H Micro repository (config.json: vocab_size 100352)OpenAI tiktoken (cl100k_base, open source)
| Signal | Result | Reference |
|---|---|---|
| Tokenizer signature | Exact match with 2 other models | tk_ba918336 |
| API surface | No other entry shares this exact contract | api_d5b2bb20 |
| Context and output | 131,000 context · 131,000 max output | declared |
| Reasoning contract | None declared | declared |
| Serving providers observed | Cloudflare | measured 21 August 2026 |
Click a row to open the full comparison.
An x marks a row excluded as corrupt (caching or provider interference detected during measurement). Overhead subtracted: 30 prompt tokens.
Granite-4.0-H-Micro is a 3B parameter from the Granite 4 family of models. These models are the latest in a series of models released by IBM. They are fine-tuned for long...
Supported parameters
frequency_penaltylogit_biaslogprobsmax_tokensmin_ppresence_penaltyrepetition_penaltyresponse_formatseedstoptemperaturetop_ktop_logprobstop_p
defaults: {"temperature":null,"top_p":null,"frequency_penalty":null}
Cite this page as the evidence record for IBM: Granite 4.0 Micro: 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.
