Mistral Large 3 - NC Bench

mistralai/mistral-large-2512

Mistral Large 3

via OpenRouter

Release Date

Dec 1st, 2025

Context Size

262k

Reasoning

Benchmark Cost

$1.41

Speed

49.2 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	83	78	75	71	70	75%
Horror: alone in an eerie place at night Creative Writing Hallucination	88	85	85	83	77	83%
Literary fiction: old friends reunite Creative Writing Hallucination	94	86	85	84	82	86%
Mystery: examining a crime scene Creative Writing Hallucination	90	84	83	81	79	83%
Romance: separated couple reunites Creative Writing Hallucination	84	83	81	80	78	81%
Thriller: chase through city streets Creative Writing Hallucination	84	84	82	79	74	80%
Detailed Writing Rules						81.66%
genre
Fantasy: entering an ancient ruin Creative Writing Hallucination	86	74	71	69	66	73%
Horror: alone in an eerie place at night Creative Writing Hallucination	84	79	76	76	74	78%
Literary fiction: old friends reunite Creative Writing Hallucination	86	84	81	73	72	79%
Mystery: examining a crime scene Creative Writing Hallucination	88	82	81	81	80	82%
Romance: separated couple reunites Creative Writing Hallucination	85	82	80	80	77	81%
Thriller: chase through city streets Creative Writing Hallucination	84	84	79	78	70	79%
genre						78.79%
Novelcrafter Default Prompt
Fantasy: entering an ancient ruin Creative Writing Hallucination	78	77	76	75	71	76%
Horror: alone in an eerie place at night Creative Writing Hallucination	87	83	80	80	80	82%
Literary fiction: old friends reunite Creative Writing Hallucination	87	86	85	84	82	85%
Mystery: examining a crime scene Creative Writing Hallucination	84	83	82	79	78	81%
Romance: separated couple reunites Creative Writing Hallucination	91	91	87	78	75	84%
Thriller: chase through city streets Creative Writing Hallucination	85	84	79	79	77	81%
Novelcrafter Default Prompt						81.41%
80.62%

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	96	96	93	93	93	94%
Medium: The Hollow (Inferred) Tooling Reasoning	97	97	97	97	96	97%
Medium: Through the Thornveil (Scattered) Tooling Reasoning	91	91	91	91	91	91%
Short: The Rusty Lantern (Explicit) Tooling Reasoning	96	96	95	95	95	96%
94.41%

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	7	6	5	5	4	3	3	3	3	2	4%
Long text (~1594 words), small codex (11 entries) Hallucination	6	6	6	6	6	5	5	5	3	3	5%
Short text (~524 words), big codex (51 entries) Hallucination	32	32	32	32	30	5	5	5	4	4	18%
Short text (~524 words), small codex (11 entries) Hallucination	32	32	32	31	31	31	31	30	6	6	26%
basic entries											13.39%
detailed entries
Long text (~1594 words), big codex (51 detailed entries) Hallucination	27	8	6	6	5	4	4	3	3	2	7%
Long text (~1594 words), small codex (11 detailed entries) Hallucination	29	29	29	29	28	4	3	3	3	3	16%
Short text (~524 words), big codex (51 detailed entries) Hallucination	100	100	100	100	100	100	100	100	100	100	100%
Short text (~524 words), small codex (11 detailed entries) Hallucination	100	100	100	100	100	100	100	100	100	100	100%
detailed entries											55.65%
34.52%

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	88	87	87	86	86	85	85	84	82	81	85%
Large codex (40 entries), short passage (165 words) Tooling Reasoning	87	85	85	85	85	85	83	83	83	81	84%
Small codex (7 entries), long passage (734 words) Tooling Reasoning	92	88	84	84	84	79	79	79	79	79	83%
Small codex (7 entries), short passage (165 words) Tooling Reasoning	97	97	97	97	97	92	92	92	92	92	94%
matrix											86.57%
tiers
5 codex entries Tooling Reasoning	91	91	91	91	91	91	91	91	91	91	91%
10 codex entries Tooling Reasoning	92	86	86	86	86	86	79	79	79	79	84%
20 codex entries Tooling Reasoning	97	89	89	89	88	86	81	81	81	81	86%
40 codex entries Tooling Reasoning	100	97	97	97	97	93	92	88	88	88	94%
tiers											88.75%
87.66%

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	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	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%
87.50%

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	50	49	49	48	0	0	0	0	0	0	20%
Write 200 words with 50% dialogue Rule Following Utility	100	99	58	50	49	45	41	38	32	26	54%
Write 200 words with 90% dialogue Rule Following Utility	49	26	26	26	22	1	0	0	0	0	15%
dialogue-200											29.50%
dialogue-500
Write 500 words with 30% dialogue Rule Following Utility	43	38	34	22	22	0	0	0	0	0	16%
Write 500 words with 50% dialogue Rule Following Utility	50	25	16	3	1	0	0	0	0	0	10%
Write 500 words with 70% dialogue Rule Following Utility	71	54	34	27	26	24	2	0	0	0	24%
dialogue-500											16.33%
Ungrouped
Write unattributed dialogue Rule Following	100	100	100	100	100	100	100	100	100	100	100%
33.93%

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	100	100	100%
Asking for directions (German) Language	100	100	100	100	100	100%
Friend got new kittens (German) Language	100	100	100	100	100	100%
Friend got new kittens (Tagalog) Language	100	100	100	100	100	100%
100.00%

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	92	80	76	67	83%
Character dialogue (German) in a story Language	100	100	100	100	93	99%
Character dialogue (Hindi) in a story Language	60	57	50	50	50	53%
Character dialogue (Italian) in a story Language	100	100	100	93	83	95%
Character dialogue (Spanish) in a story Language	100	100	93	90	67	90%
84.05%

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	96	93	93	93	91	91	89	89	89	89	91%
Write sentences with 10 words each Utility	90	90	90	84	84	84	82	66	59	59	79%
Write sentences with 20 words each Utility	2	1	1	1	0	0	0	0	0	0	0%
56.89%

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	100	100	100	100	100	100	100	0	90%
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	0	0	0	0	0	0	0	0	0	0	0%
pov-count											50.00%
60.00%

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	98	98	98	98	98	98	98	98%
Expand all contractions Text Editing	100	100	100	100	100	100	100	100%
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	74	74	74	74	74	74	74	74%
Passive voice → active voice Text Editing Hallucination	92	91	91	91	91	91	91	91%
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	99	99	99	99	99	99	99	99%
Generic Prompt								95.74%
Specific 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	99	99	99	99	99	99	99	99%
Expand all contractions Text Editing	100	100	100	100	100	100	100	100%
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	99	99	99	99	99	99	99	99%
Passive voice → active voice Text Editing Hallucination	96	96	96	96	96	96	95	96%
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								99.37%
97.56%

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	100	100	100	100	100%
100.00%

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	100	100	100	100	100	100	100%
Simple (1-shot) 1-shot Rule Following	100	100	100	100	100	100	100	100	100	100	100%
Simple (5-shot) Few-shot Rule Following	100	100	100	100	100	100	100	100	100	100	100%
Unattributed dialogue Rule Following	100	100	100	100	100	100	100	100	100	100	100%
80.00%

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	100	100	100	100	100%
50 sentence summary Utility	100	100	100	100	100	100	100	100	100	100	100%
sentences											99.95%
words
10 word summary Utility	100	100	100	100	100	98	98	98	98	98	99%
20 word summary Utility	100	100	100	100	100	100	100	100	100	100	100%
50 word summary Utility	100	100	100	27	27	27	27	27	0	0	44%
100 word summary Utility	98	77	77	54	27	9	0	0	0	0	34%
200 word summary Utility	100	100	100	98	92	92	54	9	0	0	65%
words											68.34%
87.80%