Llama 3.1 8B - NC Bench

meta-llama/llama-3.1-8b-instruct

Llama 3.1 8B

via OpenRouter

Release Date

Jul 23rd, 2024

Context Size

128k

Reasoning

Benchmark Cost

$0.17

Speed

1795.6 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	81	79	71	65	64	72%
Horror: alone in an eerie place at night Creative Writing Hallucination	77	69	68	67	65	69%
Literary fiction: old friends reunite Creative Writing Hallucination	85	80	79	79	77	80%
Mystery: examining a crime scene Creative Writing Hallucination	79	76	74	72	70	74%
Romance: separated couple reunites Creative Writing Hallucination	80	79	78	72	69	76%
Thriller: chase through city streets Creative Writing Hallucination	79	79	78	73	63	74%
Detailed Writing Rules						74.21%
genre
Fantasy: entering an ancient ruin Creative Writing Hallucination	81	76	74	72	63	73%
Horror: alone in an eerie place at night Creative Writing Hallucination	79	76	75	69	66	73%
Literary fiction: old friends reunite Creative Writing Hallucination	86	80	73	72	70	76%
Mystery: examining a crime scene Creative Writing Hallucination	82	77	70	69	68	73%
Romance: separated couple reunites Creative Writing Hallucination	81	78	78	77	72	77%
Thriller: chase through city streets Creative Writing Hallucination	84	82	81	77	72	79%
genre						75.31%
Novelcrafter Default Prompt
Fantasy: entering an ancient ruin Creative Writing Hallucination	80	78	76	71	66	74%
Horror: alone in an eerie place at night Creative Writing Hallucination	87	84	83	80	69	81%
Literary fiction: old friends reunite Creative Writing Hallucination	87	84	81	76	72	80%
Mystery: examining a crime scene Creative Writing Hallucination	75	75	75	74	73	74%
Romance: separated couple reunites Creative Writing Hallucination	89	82	74	70	68	77%
Thriller: chase through city streets Creative Writing Hallucination	86	76	75	70	69	75%
Novelcrafter Default Prompt						76.82%
75.45%

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	85	83	82	81	32	73%
Medium: The Hollow (Inferred) Tooling Reasoning	84	81	77	76	71	78%
Medium: Through the Thornveil (Scattered) Tooling Reasoning	79	69	68	64	3	57%
Short: The Rusty Lantern (Explicit) Tooling Reasoning	85	80	79	75	74	79%
71.51%

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	31	30	28	28	27	26	17	3	3	0	19%
Long text (~1594 words), small codex (11 entries) Hallucination	29	28	28	28	7	6	6	5	5	4	15%
Short text (~524 words), big codex (51 entries) Hallucination	30	29	29	28	27	26	8	7	3	1	19%
Short text (~524 words), small codex (11 entries) Hallucination	32	30	29	6	5	5	5	4	4	2	12%
basic entries											16.11%
detailed entries
Long text (~1594 words), big codex (51 detailed entries) Hallucination	33	33	33	29	27	27	6	6	2	0	20%
Long text (~1594 words), small codex (11 detailed entries) Hallucination	42	31	30	30	28	17	10	8	6	5	21%
Short text (~524 words), big codex (51 detailed entries) Hallucination	38	32	31	29	28	26	10	5	3	0	20%
Short text (~524 words), small codex (11 detailed entries) Hallucination	38	30	29	28	28	27	27	8	6	4	22%
detailed entries											20.75%
18.43%

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	57	51	42	38	36	33	33	32	3	3	33%
Large codex (40 entries), short passage (165 words) Tooling Reasoning	48	44	38	36	36	35	33	33	3	3	31%
Small codex (7 entries), long passage (734 words) Tooling Reasoning	66	66	62	62	60	57	53	53	33	3	51%
Small codex (7 entries), short passage (165 words) Tooling Reasoning	88	87	84	83	80	79	70	66	62	57	76%
matrix											47.79%
tiers
5 codex entries Tooling Reasoning	83	83	78	78	63	60	60	57	54	39	65%
10 codex entries Tooling Reasoning	44	44	42	40	39	38	33	33	3	3	32%
20 codex entries Tooling Reasoning	71	69	61	55	43	42	39	36	33	27	48%
40 codex entries Tooling Reasoning	60	57	44	42	38	33	32	25	3	3	34%
tiers											44.70%
46.25%

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	50	95%
Fruits excluding citrus Utility	100	100	100	100	100	100	100	100	100	0	90%
Future event time Reasoning	50	50	50	50	50	50	50	50	50	50	50%
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	0	90%
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	0	90%
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%
84.58%

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	52	50	50	49	48	38	26	3	1	0	32%
Write 200 words with 50% dialogue Rule Following Utility	99	99	61	53	50	50	49	22	7	0	49%
Write 200 words with 90% dialogue Rule Following Utility	62	50	50	50	38	38	18	7	0	0	31%
dialogue-200											37.29%
dialogue-500
Write 500 words with 30% dialogue Rule Following Utility	53	2	0	0	0	0	0	0	0	0	5%
Write 500 words with 50% dialogue Rule Following Utility	50	48	47	45	30	1	0	0	0	0	22%
Write 500 words with 70% dialogue Rule Following Utility	41	37	35	22	20	18	10	0	0	0	18%
dialogue-500											15.30%
Ungrouped
Write unattributed dialogue Rule Following	100	100	61	61	14	1	1	1	0	0	34%
27.37%

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	0	0	0	0	0	0%
Friend got new kittens (German) Language	100	100	100	100	0	80%
Friend got new kittens (Tagalog) Language	100	100	100	100	0	80%
55.00%

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	90	0	78%
Character dialogue (German) in a story Language	100	100	91	90	0	76%
Character dialogue (Hindi) in a story Language	71	70	56	54	50	60%
Character dialogue (Italian) in a story Language	100	97	88	83	0	74%
Character dialogue (Spanish) in a story Language	100	100	100	89	0	78%
73.13%

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	98	100%
Write sentences with 10 words each Utility	100	100	100	100	97	96	95	95	91	77	95%
Write sentences with 20 words each Utility	84	74	74	48	45	33	27	24	21	5	44%
79.50%

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	100	100%
Count scenes Utility	100	0	0	0	0	0	0	0	0	0	10%
outline-count											70.00%
pov-count
Count point of views for Jack and Olivia Utility	100	100	50	50	50	0	0	0	0	0	35%
Count point of views for Jack Harper Utility	100	100	100	0	0	0	0	0	0	0	30%
Count point of views for Olivia Utility	100	100	100	100	100	0	0	0	0	0	50%
pov-count											38.33%
54.17%

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	89	89	89	89	78	75	87%
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	92	91	87	86	82	82	77	85%
Expand all contractions Text Editing	100	98	98	98	97	97	97	98%
Location rename: market square, outer ring, bridge, northern mines Text Editing	100	100	100	100	100	100	92	99%
Multi-character gender swap: Priya(F)->Rohan(M), Mara unchanged Text Editing	86	74	74	74	74	74	73	75%
Passive voice → active voice Text Editing Hallucination	79	71	71	68	57	54	48	64%
POV shift: 3rd person to 1st person (Elena's perspective) Text Editing	100	100	100	99	99	98	95	99%
Tense rewriting: past to present Text Editing	99	99	96	95	95	94	94	96%
Generic Prompt								89.22%
Specific Prompt
Avoid said/asked/replied/answered Text Editing	89	86	78	67	67	64	53	72%
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	99	99	99	99	99	99	95	98%
Expand all contractions Text Editing	99	99	99	99	99	98	98	99%
Location rename: market square, outer ring, bridge, northern mines Text Editing	100	100	100	100	100	100	100	100%
Multi-character gender swap: Priya(F)->Rohan(M), Mara unchanged Text Editing	100	100	100	100	100	99	97	100%
Passive voice → active voice Text Editing Hallucination	86	81	80	77	74	49	46	70%
POV shift: 3rd person to 1st person (Elena's perspective) Text Editing	100	100	100	100	100	100	100	100%
Tense rewriting: past to present Text Editing	100	100	100	100	100	100	100	100%
Specific Prompt								93.23%
91.22%

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	0	0	0	0	60%
60.00%

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	100	100	100	100	0	0	0	0	0	0	40%
Simple (1-shot) 1-shot Rule Following	100	100	100	100	100	100	0	0	0	0	60%
Simple (5-shot) Few-shot Rule Following	100	100	100	100	100	100	100	100	0	0	80%
Unattributed dialogue Rule Following	100	100	100	100	100	100	100	100	100	0	90%
54.00%

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	0	90%
5 paragraph summary Utility	100	100	100	100	100	100	100	100	0	0	80%
paragraphs											90.00%
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	98	100%
10 sentence summary Utility	100	100	100	100	100	100	100	100	92	92	98%
20 sentence summary Utility	100	100	100	100	100	98	98	98	77	27	90%
50 sentence summary Utility	100	100	100	100	0	0	0	0	0	0	40%
sentences											85.64%
words
10 word summary Utility	100	100	100	100	100	98	98	98	92	92	98%
20 word summary Utility	100	100	100	100	100	98	92	77	27	27	82%
50 word summary Utility	100	100	77	54	54	27	27	0	0	0	44%
100 word summary Utility	100	100	100	98	9	2	0	0	0	0	41%
200 word summary Utility	0	0	0	0	0	0	0	0	0	0	0%
words											52.99%
74.09%