Nemotron 3 Nano - NC Bench

nvidia/nemotron-3-nano-30b-a3b

Nemotron 3 Nano

via OpenRouter

Release Date

Dec 14th, 2025

Context Size

262k

Reasoning

Benchmark Cost

$1.23

Speed

83.3 tok/s

Subcategories

Bad Writing Habits

Detects common prose quality anti-patterns in AI-generated creative writing, including passive voice, past progressive overuse, weak dialogue tags, filter words, purple prose, cliches, AI-ism words/adverbs/names, and more.

Scenario	#1	#2	#3	#4	#5	Total
Detailed Writing Rules
Fantasy: entering an ancient ruin Creative Writing Hallucination	74	71	68	63	62	68%
Horror: alone in an eerie place at night Creative Writing Hallucination	67	65	61	58	56	61%
Literary fiction: old friends reunite Creative Writing Hallucination	78	76	72	65	64	71%
Mystery: examining a crime scene Creative Writing Hallucination	75	71	68	68	68	70%
Romance: separated couple reunites Creative Writing Hallucination	73	73	71	65	61	69%
Thriller: chase through city streets Creative Writing Hallucination	74	68	66	64	62	67%
Detailed Writing Rules						67.55%
genre
Fantasy: entering an ancient ruin Creative Writing Hallucination	63	63	62	61	59	62%
Horror: alone in an eerie place at night Creative Writing Hallucination	65	63	60	59	56	61%
Literary fiction: old friends reunite Creative Writing Hallucination	72	71	64	63	63	66%
Mystery: examining a crime scene Creative Writing Hallucination	77	69	63	63	61	67%
Romance: separated couple reunites Creative Writing Hallucination	64	62	60	60	58	61%
Thriller: chase through city streets Creative Writing Hallucination	69	67	65	64	62	66%
genre						63.63%
Novelcrafter Default Prompt
Fantasy: entering an ancient ruin Creative Writing Hallucination	68	66	66	62	61	64%
Horror: alone in an eerie place at night Creative Writing Hallucination	69	69	63	55	53	62%
Literary fiction: old friends reunite Creative Writing Hallucination	69	69	68	64	62	66%
Mystery: examining a crime scene Creative Writing Hallucination	72	71	67	66	63	68%
Romance: separated couple reunites Creative Writing Hallucination	72	70	66	64	64	67%
Thriller: chase through city streets Creative Writing Hallucination	82	69	65	64	61	68%
Novelcrafter Default Prompt						65.96%
65.72%

Codex Extraction

Evaluates a model's ability to extract structured codex entries (characters, locations, objects, lore) from prose passages and return them as well-formed XML.

Scenario	#1	#2	#3	#4	#5	Total
Long: The Spire of Echoes (Dense) Tooling Reasoning	94	94	92	92	88	92%
Medium: The Hollow (Inferred) Tooling Reasoning	94	93	90	90	88	91%
Medium: Through the Thornveil (Scattered) Tooling Reasoning	92	92	91	90	88	90%
Short: The Rusty Lantern (Explicit) Tooling Reasoning	94	94	93	92	91	93%
91.51%

Codex Red Herring (False Positive Detection)

Tests whether models correctly report "no violations" when a codex is fully consistent with the prose passage. Models that hallucinate false violations (false positives) fail. Uses a 2×2 matrix of text length × codex size, with bare and detailed-entry variants.

Scenario	#1	#2	#3	#4	#5	#6	#7	#8	#9	#10	Total
basic entries
Long text (~1594 words), big codex (51 entries) Hallucination	100	100	100	100	100	100	100	100	100	25	93%
Long text (~1594 words), small codex (11 entries) Hallucination	100	100	100	100	100	100	100	100	100	100	100%
Short text (~524 words), big codex (51 entries) Hallucination	100	100	100	100	100	100	100	100	25	17	84%
Short text (~524 words), small codex (11 entries) Hallucination	100	100	100	100	100	100	100	100	100	25	93%
basic entries											92.29%
detailed entries
Long text (~1594 words), big codex (51 detailed entries) Hallucination	100	100	100	100	100	100	100	100	25	25	85%
Long text (~1594 words), small codex (11 detailed entries) Hallucination	100	100	100	100	100	100	100	100	25	17	84%
Short text (~524 words), big codex (51 detailed entries) Hallucination	100	100	100	100	100	100	100	25	25	25	78%
Short text (~524 words), small codex (11 detailed entries) Hallucination	100	100	100	100	100	100	100	100	25	25	85%
detailed entries											82.92%
87.60%

Codex Violation Detection

Detects factual inconsistencies between a story bible and prose passages. The model must output structured XML identifying each violation with paragraph number and substring.

Scenario	#1	#2	#3	#4	#5	#6	#7	#8	#9	#10	Total
matrix
Large codex (40 entries), long passage (1,019 words) Tooling Reasoning	80	77	77	76	74	74	73	68	65	60	72%
Large codex (40 entries), short passage (165 words) Tooling Reasoning	93	91	88	88	86	86	84	82	79	78	86%
Small codex (7 entries), long passage (734 words) Tooling Reasoning	87	87	87	84	80	80	80	80	76	76	82%
Small codex (7 entries), short passage (165 words) Tooling Reasoning	100	97	97	97	97	93	93	93	93	93	95%
matrix											83.75%
tiers
5 codex entries Tooling Reasoning	100	100	100	100	100	100	93	93	93	87	97%
10 codex entries Tooling Reasoning	94	94	89	86	86	86	86	79	78	58	84%
20 codex entries Tooling Reasoning	94	94	91	91	89	82	82	82	82	73	86%
40 codex entries Tooling Reasoning	97	93	90	88	88	87	87	84	76	75	86%
tiers											88.25%
86.00%

Data extraction

Extract key details from a given block of text.

Scenario	#1	#2	#3	#4	#5	#6	#7	#8	#9	#10	Total
All valid emails Utility	100	100	100	100	100	100	100	100	100	100	100%
Contextual pronoun Utility	100	100	100	100	100	100	100	100	100	100	100%
Fruits excluding citrus Utility	100	100	100	100	100	100	100	100	100	100	100%
Future event time Reasoning	100	100	100	100	100	100	100	100	100	100	100%
Guess the pet Reasoning	100	100	100	100	100	100	100	100	100	100	100%
Highest-rated movie Reasoning	100	100	100	100	100	100	100	100	100	100	100%
Indirect birth year Reasoning	100	100	100	100	100	100	100	100	100	100	100%
What instrument does Lucy play? Reasoning	100	100	100	100	100	100	100	100	100	100	100%
What's the color of the car? Utility	100	100	100	100	100	100	100	100	100	100	100%
What's the correct time? Reasoning	0	0	0	0	0	0	0	0	0	0	0%
Who's the sister? Reasoning	100	100	100	100	100	100	100	100	100	100	100%
Who's the tallest? Reasoning	100	100	100	100	100	100	100	100	100	100	100%
91.67%

Dialogue tags

Various tasks related to dialogue tags in text.

Scenario	#1	#2	#3	#4	#5	#6	#7	#8	#9	#10	Total
dialogue-200
Write 200 words with 10% dialogue Rule Following Utility	100	100	100	100	100	100	100	100	76	50	93%
Write 200 words with 50% dialogue Rule Following Utility	100	100	100	98	73	72	65	50	50	44	75%
Write 200 words with 90% dialogue Rule Following Utility	87	86	50	50	50	50	50	50	50	0	52%
dialogue-200											73.36%
dialogue-500
Write 500 words with 30% dialogue Rule Following Utility	100	100	86	82	63	50	33	33	0	0	55%
Write 500 words with 50% dialogue Rule Following Utility	100	98	95	50	49	38	0	0	0	0	43%
Write 500 words with 70% dialogue Rule Following Utility	52	50	50	50	3	0	0	0	0	0	21%
dialogue-500											39.35%
Ungrouped
Write unattributed dialogue Rule Following	100	100	100	100	100	100	61	0	0	0	66%
57.74%

Language Comprehension

Does the model understand more than just English?

Scenario	#1	#2	#3	#4	#5	Total
Asking for directions (Dutch) Language	100	100	100	0	0	60%
Asking for directions (German) Language	100	100	100	100	100	100%
Friend got new kittens (German) Language	100	100	100	0	0	60%
Friend got new kittens (Tagalog) Language	100	100	100	100	100	100%
80.00%

Language Writing

Can the model generate text in different languages?

Scenario	#1	#2	#3	#4	#5	Total
Character dialogue (French) in a story Language	100	100	100	100	86	97%
Character dialogue (German) in a story Language	100	100	100	100	100	100%
Character dialogue (Hindi) in a story Language	100	100	100	100	100	100%
Character dialogue (Italian) in a story Language	100	100	100	83	50	87%
Character dialogue (Spanish) in a story Language	100	100	100	88	75	93%
95.26%

N-Length Sentences

Write sentences with exactly N words

Scenario	#1	#2	#3	#4	#5	#6	#7	#8	#9	#10	Total
Write sentences with 5 words each Utility	100	100	100	100	100	100	100	100	100	100	100%
Write sentences with 10 words each Utility	100	100	100	100	100	100	100	100	100	91	99%
Write sentences with 20 words each Utility	100	100	100	100	100	100	100	100	100	100	100%
99.71%

Novel outline

Handle questions about the outline of a novel in various formats

Scenario	#1	#2	#3	#4	#5	#6	#7	#8	#9	#10	Total
outline-count
Count acts Utility	100	100	100	100	100	100	100	100	100	100	100%
Count chapters Utility	100	100	100	100	100	100	100	100	100	0	90%
Count scenes Utility	100	100	100	100	100	0	0	0	0	0	50%
outline-count											80.00%
pov-count
Count point of views for Jack and Olivia Utility	50	50	50	50	50	50	50	0	0	0	35%
Count point of views for Jack Harper Utility	100	100	100	100	100	100	0	0	0	0	60%
Count point of views for Olivia Utility	100	100	100	0	0	0	0	0	0	0	30%
pov-count											41.67%
60.83%

Text Replacement

Tests deterministic text transformations: renaming characters/locations, expanding contractions, tense rewriting, POV shifts, gender swaps, combined transformations, and word avoidance. Scored by checking each expected change independently.

Scenario	#1	#2	#3	#4	#5	#6	#7	Total
Generic Prompt
Avoid said/asked/replied/answered Text Editing	100	100	100	100	100	100	100	100%
Character rename: Elena->Mirabel, Gregor->Aldric Text Editing	100	100	100	100	100	100	100	100%
Combined: 3rd person past → 1st person present Text Editing	96	93	93	92	85	22	14	71%
Expand all contractions Text Editing	100	98	98	92	59	41	16	72%
Location rename: market square, outer ring, bridge, northern mines Text Editing	100	100	100	100	100	96	96	99%
Multi-character gender swap: Priya(F)->Rohan(M), Mara unchanged Text Editing	99	99	95	87	74	39	33	75%
Passive voice → active voice Text Editing Hallucination	88	85	60	56	48	40	35	59%
POV shift: 3rd person to 1st person (Elena's perspective) Text Editing	100	100	100	99	97	97	94	98%
Tense rewriting: past to present Text Editing	93	92	89	82	82	75	22	76%
Generic Prompt								83.33%
Specific Prompt
Avoid said/asked/replied/answered Text Editing	100	100	100	100	81	69	67	88%
Character rename: Elena->Mirabel, Gregor->Aldric Text Editing	100	100	100	100	95	65	58	88%
Combined: 3rd person past → 1st person present Text Editing	95	95	95	95	47	44	37	73%
Expand all contractions Text Editing	100	99	99	98	69	64	26	79%
Location rename: market square, outer ring, bridge, northern mines Text Editing	100	100	100	100	100	98	63	94%
Multi-character gender swap: Priya(F)->Rohan(M), Mara unchanged Text Editing	99	97	90	70	39	39	27	66%
Passive voice → active voice Text Editing Hallucination	94	93	92	90	90	49	33	77%
POV shift: 3rd person to 1st person (Elena's perspective) Text Editing	100	100	100	100	99	75	70	92%
Tense rewriting: past to present Text Editing	99	96	95	91	89	89	85	92%
Specific Prompt								83.28%
83.30%

Tool usage within Novelcrafter

Output messages that are related to tool usage within Novelcrafter

Scenario	#1	#2	#3	#4	#5	#6	#7	#8	#9	#10	Total
Create alternate prose sections Tooling	100	100	100	100	100	100	67	67	0	0	73%
73.33%

Voice/dialogue sheets

Extract dialogue from given text as voice sheets.

Scenario	#1	#2	#3	#4	#5	#6	#7	#8	#9	#10	Total
Multiple speakers Rule Following	0	0	0	0	0	0	0	0	0	0	0%
Simple Rule Following	0	0	0	0	0	0	0	0	0	0	0%
Simple (1-shot) 1-shot Rule Following	100	0	0	0	0	0	0	0	0	0	10%
Simple (5-shot) Few-shot Rule Following	100	0	0	0	0	0	0	0	0	0	10%
Unattributed dialogue Rule Following	100	100	100	100	100	100	100	100	100	0	90%
22.00%

Write N of X

Write exactly N words/sentences/paragraphs...

Scenario	#1	#2	#3	#4	#5	#6	#7	#8	#9	#10	Total
paragraphs
1 paragraph summary Utility	100	100	100	100	100	100	100	100	100	100	100%
3 paragraph summary Utility	100	100	100	100	100	100	100	100	100	100	100%
5 paragraph summary Utility	100	100	100	100	100	100	100	100	100	100	100%
paragraphs											100.00%
sentences
1 sentence summary Utility	100	100	100	100	100	100	100	100	100	100	100%
3 sentence summary Utility	100	100	100	100	100	100	100	100	100	100	100%
10 sentence summary Utility	100	100	100	100	100	100	100	100	100	98	100%
20 sentence summary Utility	100	100	100	100	100	100	98	77	27	27	83%
50 sentence summary Utility	100	100	100	100	100	100	98	77	27	9	81%
sentences											92.81%
words
10 word summary Utility	100	100	100	100	100	100	100	100	100	100	100%
20 word summary Utility	100	100	100	100	100	100	100	100	100	2	90%
50 word summary Utility	100	100	100	100	100	100	100	0	0	0	70%
100 word summary Utility	100	100	100	100	100	100	100	100	100	0	90%
200 word summary Utility	100	100	100	100	100	100	100	100	100	100	100%
words											90.02%
93.40%