nvidia/nemotron-3-nano-30b-a3b behavioral LLM fingerprint
This page breaks down the exact reference that VerifyLLMAPI uses for nvidia/nemotron-3-nano-30b-a3b: 117 normalized answers across eight low-entropy probes, plus its nearest enrolled models by mean Jensen–Shannon divergence.
Fingerprint summary
- Reference answers
- 117
- Samples per cell
- 13–15
- Nearest model
- x-ai/grok-4.3
- Nearest mean JSD
- 0.661502
The most concentrated cell was animal-random|en: elephant held 66.7% of its answers and entropy measured 1.559 bits. The broadest cell was letter-random|zh at 3.907 bits.
Against the closest enrolled model, animal-random|ar contributed the largest cell distance at JSD 0.902521. This is a descriptive comparison, not proof that either API route serves a named checkpoint.
Completeness: the author dataset allows up to 15 valid answers per selected cell in reference half A. This model contains 117/120 across the eight cells. We show the actual denominator for every share.
The eight test requests
The research pipeline sent each user prompt with a one-answer system constraint, temperature 1, a 16-token output cap, and reasoning disabled. VerifyLLMAPI uses the same prompt text and normalization target.
| Cell | Task | Exact request text | Normalization and n |
|---|---|---|---|
animal-random|en |
Random animal · English | Name a random animal.System constraintAnswer with a single word or a single number only. Output nothing else: no explanation, no punctuation, no quotation marks. |
word · 15/15 reference samples |
word-random|en |
Random word · English | Name a random word.System constraintAnswer with a single word or a single number only. Output nothing else: no explanation, no punctuation, no quotation marks. |
word · 14/15 reference samples |
animal-random|ru |
Random animal · Russian | Назови случайное животное.System constraintОтвечай только одним словом или одним числом. Не выводи ничего больше: без объяснений, без знаков препинания, без кавычек. |
word · 15/15 reference samples |
animal-random|ar |
Random animal · Arabic | اذكر حيواناً عشوائياً.System constraintأجب بكلمة واحدة أو رقم واحد فقط. لا تكتب أي شيء آخر: لا شرح ولا علامات ترقيم ولا علامات اقتباس. |
word · 13/15 reference samples |
letter-random|zh |
Random character · Chinese | 说出一个随机的汉字。System constraint只用一个词或一个数字回答。不要输出任何其他内容：不要解释，不要标点符号，不要引号。 |
grapheme · 15/15 reference samples |
animal-random|zh |
Random animal · Chinese | 说出一个随机的动物。System constraint只用一个词或一个数字回答。不要输出任何其他内容：不要解释，不要标点符号，不要引号。 |
word · 15/15 reference samples |
letter-random|ar |
Random letter · Arabic | اذكر حرفاً عشوائياً من الحروف الأبجدية.System constraintأجب بكلمة واحدة أو رقم واحد فقط. لا تكتب أي شيء آخر: لا شرح ولا علامات ترقيم ولا علامات اقتباس. |
grapheme · 15/15 reference samples |
color-random|zh |
Random color · Chinese | 说出一个随机的颜色。System constraint只用一个词或一个数字回答。不要输出任何其他内容：不要解释，不要标点符号，不要引号。 |
word · 15/15 reference samples |
Response distributions
These are normalized reference-half counts from the published OpenRouter dataset. The tables contain aggregate values, not user data or a live VerifyLLMAPI scan.
1. animal-random|en
Random animal, English. 15 valid reference answers produced 5 normalized values. The mode was elephant at 10/15 (66.7%); entropy was 1.559 bits.
| Normalized response | Count | Share |
|---|---|---|
elephant |
10 | 66.7% |
giraffe |
2 | 13.3% |
axolotl |
1 | 6.7% |
cat |
1 | 6.7% |
kangaroo |
1 | 6.7% |
2. word-random|en
Random word, English. 14 valid reference answers produced 10 normalized values. The mode was apple at 4/14 (28.6%); entropy was 3.093 bits.
| Normalized response | Count | Share |
|---|---|---|
apple |
4 | 28.6% |
river |
2 | 14.3% |
dream |
1 | 7.1% |
kaleidoscope |
1 | 7.1% |
oracle |
1 | 7.1% |
puzzle |
1 | 7.1% |
quantum |
1 | 7.1% |
silica |
1 | 7.1% |
zebra |
1 | 7.1% |
zomby |
1 | 7.1% |
3. animal-random|ru
Random animal, Russian. 15 valid reference answers produced 13 normalized values. The mode was собака at 3/15 (20.0%); entropy was 3.590 bits.
| Normalized response | Count | Share |
|---|---|---|
собака |
3 | 20.0% |
elephant |
1 | 6.7% |
ли |
1 | 6.7% |
лиракула |
1 | 6.7% |
лисa |
1 | 6.7% |
лиса |
1 | 6.7% |
лисица |
1 | 6.7% |
обезьяна |
1 | 6.7% |
овца |
1 | 6.7% |
олень |
1 | 6.7% |
осьменькоifera |
1 | 6.7% |
рыба |
1 | 6.7% |
слон |
1 | 6.7% |
4. animal-random|ar
Random animal, Arabic. 13 valid reference answers produced 10 normalized values. The mode was cat at 2/13 (15.4%); entropy was 3.239 bits.
| Normalized response | Count | Share |
|---|---|---|
cat |
2 | 15.4% |
غزال |
2 | 15.4% |
狐狸 |
2 | 15.4% |
sloth |
1 | 7.7% |
spotlight |
1 | 7.7% |
utaopanerpctomying |
1 | 7.7% |
ذئب |
1 | 7.7% |
زرافت |
1 | 7.7% |
غراب |
1 | 7.7% |
猎豹 |
1 | 7.7% |
5. letter-random|zh
Random character, Chinese. 15 valid reference answers produced 15 normalized values. The mode was 东 at 1/15 (6.7%); entropy was 3.907 bits.
| Normalized response | Count | Share |
|---|---|---|
东 |
1 | 6.7% |
凉 |
1 | 6.7% |
和 |
1 | 6.7% |
国 |
1 | 6.7% |
山 |
1 | 6.7% |
是 |
1 | 6.7% |
枫 |
1 | 6.7% |
氵 |
1 | 6.7% |
永 |
1 | 6.7% |
汉 |
1 | 6.7% |
火 |
1 | 6.7% |
的 |
1 | 6.7% |
蛋 |
1 | 6.7% |
青 |
1 | 6.7% |
鼎 |
1 | 6.7% |
6. animal-random|zh
Random animal, Chinese. 15 valid reference answers produced 13 normalized values. The mode was 狐狸 at 3/15 (20.0%); entropy was 3.590 bits.
| Normalized response | Count | Share |
|---|---|---|
狐狸 |
3 | 20.0% |
wolf |
1 | 6.7% |
变色龙 |
1 | 6.7% |
家禽 |
1 | 6.7% |
灵狐 |
1 | 6.7% |
狮子 |
1 | 6.7% |
狼 |
1 | 6.7% |
猫 |
1 | 6.7% |
猫猫猫 |
1 | 6.7% |
猴子 |
1 | 6.7% |
羊驼 |
1 | 6.7% |
苔藓狐猴 |
1 | 6.7% |
鹤 |
1 | 6.7% |
7. letter-random|ar
Random letter, Arabic. 15 valid reference answers produced 8 normalized values. The mode was k at 5/15 (33.3%); entropy was 2.733 bits.
| Normalized response | Count | Share |
|---|---|---|
k |
5 | 33.3% |
b |
2 | 13.3% |
d |
2 | 13.3% |
q |
2 | 13.3% |
g |
1 | 6.7% |
x |
1 | 6.7% |
z |
1 | 6.7% |
ب |
1 | 6.7% |
8. color-random|zh
Random color, Chinese. 15 valid reference answers produced 8 normalized values. The mode was red at 4/15 (26.7%); entropy was 2.707 bits.
| Normalized response | Count | Share |
|---|---|---|
red |
4 | 26.7% |
蓝色 |
4 | 26.7% |
蓝 |
2 | 13.3% |
blue |
1 | 6.7% |
green |
1 | 6.7% |
purple |
1 | 6.7% |
儿童跑步鞋清洁指南 |
1 | 6.7% |
红色 |
1 | 6.7% |
Three nearest enrolled references
We compute base-2 JSD for each of the eight categorical distributions, then average the eight distances. A lower value means more similar answer frequencies within this product reference. It does not identify an unknown route by itself.
| Rank | Reference model | Mean 8-cell JSD |
|---|---|---|
| 1 | x-ai/grok-4.3 |
0.661502 |
| 2 | mistralai/voxtral-small-24b-2507 |
0.681537 |
| 3 | deepseek/deepseek-chat-v3-0324 |
0.699787 |
How many live requests does verification use?
| Profile | Cells × samples | Fresh model requests | Same-data EER |
|---|---|---|---|
| Quick, default complete check | 4 × 5 | 20 | 11.8% |
| Standard | 8 × 5 | 40 | 8.1% |
| Paper budget | 8 × 15 | 120 | 6.7% |
The current-Agent workflow starts with quick. Each answer comes from a fresh Codex or Claude Code process that reuses host-managed login. These requests can consume host allowance or provider balance.
What this fingerprint can and cannot show
- The reference records behavior observed through OpenRouter in the author dataset. Provider wrappers, model updates, decoding, and date can move a distribution.
- The author collection set temperature 1 and disabled reasoning. Current-Agent mode labels sampling as a host default because supported Agent CLIs expose no temperature flag.
- The eight high-gap cells and product thresholds use the same public cohort. Their EER values are calibration results, not an independent production accuracy claim.
- A nearest reference is a similarity result. VerifyLLMAPI returns INCONCLUSIVE when the claimed route lacks an enrolled fingerprint.
Primary sources, license, and reproducibility
- Tomas Bruckner, One Token Is Enough: Fingerprinting and Verifying Large Language Models from Single-Token Output Distributions, arXiv:2607.10252v1.
- Author dataset and derived results, DOI 10.5281/zenodo.21278557, CC BY 4.0.
- Author collection and analysis software, DOI 10.5281/zenodo.21278793, MIT.
- VerifyLLMAPI atlas JSON, built from reference
pamela-openrouter-2026-07-8cell-ref-a, SHA-25651f3f63cbcfb56b151055d2d10e36a9cc2f0644cc68b580784853d68951fa866.
Page evidence SHA-256: d3f20729812f018cee06d52c02bc6e01b5960e8671626bd6174d1f5592c1677d. This hash covers the model ID, eight cell metrics, nearest references, and strongest cell difference in the generated atlas.