Benchmarks tell you how good a model is. YFarmX tells you what it is. Independent fingerprints for AI models and endpoints: measured tokenizer signatures, API-surface contracts and lineage evidence, kept as history.
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Catalogue and measurements as at 22 August 2026. Every figure derives from the committed measurement files; the methodology records how, and what the method cannot see.
01 · MEASURE
Fifty adversarial strings are sent to each model and only the reported prompt-token count is read. The marginal cost of each string under the model's tokenizer becomes a 50-number signature.
02 · COMPARE
Signatures are compared offline against every other model measured. Exact agreement across all fifty strings is strong lineage evidence; the API-surface contract is checked as an independent second signal.
03 · TRACK
Every observation is kept, none is overwritten. When an endpoint's fingerprint moves, the history shows what changed and on which day.
A shared tokenizer is evidence of shared lineage, never proof of an exact model. Theclaims hierarchy keeps every published conclusion inside what the evidence supports, and the controls are published with the results.
