DeepSeek V3.1 Terminus Behavioral Fingerprint
How DeepSeek's DeepSeek V3.1 Terminus 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
DeepSeek
Data generated
2026-07-08
Probe cells
15
Valid samples
441
Randomness score
36 / 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
17 / 30 answers
Favorite color
blue
27 / 30 answers
Coin flip: heads
72%
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 = 1.00 bit · uniform baseline 1.00 bit
| Answer | Count | Share |
|---|---|---|
| heads | 16 | 53.3% |
| tails | 14 | 46.7% |
Coin flip · Chinese
n = 28 · H = 0.37 bit · uniform baseline 1.00 bit
| Answer | Count | Share |
|---|---|---|
| heads | 26 | 92.9% |
| tails | 2 | 7.1% |
Favorite number · English
n = 23 · H = 1.72 bit · uniform baseline 13.29 bit
| Answer | Count | Share |
|---|---|---|
| 7 | 13 | 56.5% |
| 42 | 5 | 21.7% |
| 9 | 3 | 13.0% |
| 5 | 1 | 4.3% |
| 8 | 1 | 4.3% |
Favorite number · Chinese
n = 30 · H = 1.11 bit · uniform baseline 13.29 bit
| Answer | Count | Share |
|---|---|---|
| 42 | 19 | 63.3% |
| 7 | 10 | 33.3% |
| 3 | 1 | 3.3% |
Random animal · English
n = 30 · H = 1.90 bit · uniform baseline 5.64 bit
| Answer | Count | Share |
|---|---|---|
| elephant | 19 | 63.3% |
| lion | 3 | 10.0% |
| dog | 3 | 10.0% |
| rabbit | 1 | 3.3% |
| tiger | 1 | 3.3% |
| cat | 1 | 3.3% |
| frog | 1 | 3.3% |
| zebra | 1 | 3.3% |
Random animal · Chinese
n = 30 · H = 3.45 bit · uniform baseline 5.64 bit
| Answer | Count | Share |
|---|---|---|
| 袋鼠 | 8 | 26.7% |
| 狗 | 5 | 16.7% |
| 猫 | 4 | 13.3% |
| 狮子 | 1 | 3.3% |
| 树懒 | 1 | 3.3% |
| 鹰 | 1 | 3.3% |
| 马 | 1 | 3.3% |
| 犀牛 | 1 | 3.3% |
+ 8 more answers
Random city · English
n = 30 · H = 2.76 bit · uniform baseline 5.64 bit
| Answer | Count | Share |
|---|---|---|
| chicago | 9 | 30.0% |
| tokyo | 8 | 26.7% |
| berlin | 4 | 13.3% |
| london | 2 | 6.7% |
| paris | 2 | 6.7% |
| memphis | 1 | 3.3% |
| austin | 1 | 3.3% |
| denver | 1 | 3.3% |
+ 2 more answers
Random city · Chinese
n = 30 · H = 2.15 bit · uniform baseline 5.64 bit
| Answer | Count | Share |
|---|---|---|
| 东京 | 19 | 63.3% |
| 上海 | 2 | 6.7% |
| 渥太华 | 1 | 3.3% |
| 雅典 | 1 | 3.3% |
| 柏林 | 1 | 3.3% |
| 西安 | 1 | 3.3% |
| 深圳 | 1 | 3.3% |
| 墨尔本 | 1 | 3.3% |
+ 3 more answers
Random color · English
n = 30 · H = 0.56 bit · uniform baseline 4.91 bit
| Answer | Count | Share |
|---|---|---|
| blue | 27 | 90.0% |
| red | 2 | 6.7% |
| fuchsia | 1 | 3.3% |
Random color · Chinese
n = 30 · H = 1.05 bit · uniform baseline 4.91 bit
| Answer | Count | Share |
|---|---|---|
| 蓝 | 23 | 76.7% |
| 红 | 5 | 16.7% |
| 靛蓝 | 1 | 3.3% |
| 绿 | 1 | 3.3% |
Random letter · English
n = 30 · H = 2.68 bit · uniform baseline 4.70 bit
| Answer | Count | Share |
|---|---|---|
| g | 14 | 46.7% |
| e | 3 | 10.0% |
| d | 3 | 10.0% |
| m | 2 | 6.7% |
| r | 2 | 6.7% |
| x | 1 | 3.3% |
| k | 1 | 3.3% |
| c | 1 | 3.3% |
+ 3 more answers
Random number 1-10 · English
n = 30 · H = 0.97 bit · uniform baseline 3.32 bit
| Answer | Count | Share |
|---|---|---|
| 7 | 25 | 83.3% |
| 5 | 2 | 6.7% |
| 3 | 1 | 3.3% |
| 6 | 1 | 3.3% |
| 8 | 1 | 3.3% |
Random number 1-10 · Chinese
n = 30 · H = 1.56 bit · uniform baseline 3.32 bit
| Answer | Count | Share |
|---|---|---|
| 7 | 19 | 63.3% |
| 5 | 5 | 16.7% |
| 3 | 4 | 13.3% |
| 6 | 1 | 3.3% |
| 9 | 1 | 3.3% |
Random number 1-100 · English
n = 30 · H = 2.07 bit · uniform baseline 6.64 bit
| Answer | Count | Share |
|---|---|---|
| 42 | 17 | 56.7% |
| 73 | 5 | 16.7% |
| 47 | 2 | 6.7% |
| 67 | 2 | 6.7% |
| 37 | 1 | 3.3% |
| 54 | 1 | 3.3% |
| 72 | 1 | 3.3% |
| 74 | 1 | 3.3% |
Random number 1-100 · Chinese
n = 30 · H = 0.67 bit · uniform baseline 6.64 bit
| Answer | Count | Share |
|---|---|---|
| 42 | 26 | 86.7% |
| 57 | 3 | 10.0% |
| 53 | 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.