Gemma 4 31B Behavioral Fingerprint
How Google's Gemma 4 31B answers one-word probe questions at temperature 1.0 — random numbers, colors, animals, coin flips — measured over 441 valid samples in the open dataset of "One Token Is Enough" (arXiv:2607.10252).
Vendor
Data generated
2026-07-08
Probe cells
15
Valid samples
441
Randomness score
6 / 100
Mean normalized entropy across cells, 0–100. 100 would be a uniform-random baseline; real models score far lower.
Signature answers
Favorite random number (1–100)
42
28 / 29 answers
Favorite color
azure
15 / 29 answers
Coin flip: heads
100%
Share of heads across coin-flip cells.
Answer distributions by probe cell
Empirical distributions of normalized one-word answers, per task and language. H is the Shannon entropy in bits; the uniform baseline is log2 of the answer-domain size.
Coin flip · English
n = 30 · H = 0.00 bit · uniform baseline 1.00 bit
| Answer | Count | Share |
|---|---|---|
| heads | 30 | 100.0% |
Coin flip · Chinese
n = 29 · H = 0.00 bit · uniform baseline 1.00 bit
| Answer | Count | Share |
|---|---|---|
| heads | 29 | 100.0% |
Favorite number · English
n = 29 · H = 0.36 bit · uniform baseline 13.29 bit
| Answer | Count | Share |
|---|---|---|
| 42 | 27 | 93.1% |
| 7 | 2 | 6.9% |
Favorite number · Chinese
n = 30 · H = 0.00 bit · uniform baseline 13.29 bit
| Answer | Count | Share |
|---|---|---|
| 7 | 30 | 100.0% |
Random animal · English
n = 30 · H = 1.07 bit · uniform baseline 5.64 bit
| Answer | Count | Share |
|---|---|---|
| capybara | 20 | 66.7% |
| elephant | 9 | 30.0% |
| cat | 1 | 3.3% |
Random animal · Chinese
n = 30 · H = 1.18 bit · uniform baseline 5.64 bit
| Answer | Count | Share |
|---|---|---|
| 猫 | 22 | 73.3% |
| 熊猫 | 5 | 16.7% |
| 豹子 | 2 | 6.7% |
| 老虎 | 1 | 3.3% |
Random city · English
n = 30 · H = 0.00 bit · uniform baseline 5.64 bit
| Answer | Count | Share |
|---|---|---|
| tokyo | 30 | 100.0% |
Random city · Chinese
n = 30 · H = 0.00 bit · uniform baseline 5.64 bit
| Answer | Count | Share |
|---|---|---|
| 东京 | 30 | 100.0% |
Random color · English
n = 29 · H = 1.00 bit · uniform baseline 4.91 bit
| Answer | Count | Share |
|---|---|---|
| azure | 15 | 51.7% |
| blue | 14 | 48.3% |
Random color · Chinese
n = 27 · H = 0.38 bit · uniform baseline 4.91 bit
| Answer | Count | Share |
|---|---|---|
| 蓝 | 25 | 92.6% |
| 红 | 2 | 7.4% |
Random letter · English
n = 29 · H = 0.89 bit · uniform baseline 4.70 bit
| Answer | Count | Share |
|---|---|---|
| q | 20 | 69.0% |
| r | 9 | 31.0% |
Random number 1-10 · English
n = 29 · H = 0.00 bit · uniform baseline 3.32 bit
| Answer | Count | Share |
|---|---|---|
| 7 | 29 | 100.0% |
Random number 1-10 · Chinese
n = 30 · H = 0.00 bit · uniform baseline 3.32 bit
| Answer | Count | Share |
|---|---|---|
| 7 | 30 | 100.0% |
Random number 1-100 · English
n = 29 · H = 0.22 bit · uniform baseline 6.64 bit
| Answer | Count | Share |
|---|---|---|
| 42 | 28 | 96.6% |
| 4 | 1 | 3.4% |
Random number 1-100 · Chinese
n = 30 · H = 0.21 bit · uniform baseline 6.64 bit
| Answer | Count | Share |
|---|---|---|
| 42 | 29 | 96.7% |
| 4 | 1 | 3.3% |
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Distributions: Tomáš Bruckner, "One Token Is Enough" (arXiv:2607.10252), official dataset Zenodo DOI 10.5281/zenodo.21278557, licensed CC-BY-4.0. Collected via OpenRouter at temperature 1.0 under the paper's fixed minimal one-word system prompt; answer keys are re-normalized with the checker's pipeline (color aliases, number words, coin h/t) so live probes are directly comparable.