Mistral Large 4.0

mistralai/mistral-large-4-0

Mistral Large 4.0

via OpenRouter

Release Date

Oct 6th, 2026

Context Size

524k

Reasoning

Benchmark Cost

$2.29

Speed

45.9 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	85	82	77	76	75	79%
Horror: alone in an eerie place at night Creative Writing Hallucination	90	83	78	77	74	80%
Literary fiction: old friends reunite Creative Writing Hallucination	87	82	81	79	78	81%
Mystery: examining a crime scene Creative Writing Hallucination	87	85	84	84	84	85%
Romance: separated couple reunites Creative Writing Hallucination	88	85	84	82	80	84%
Thriller: chase through city streets Creative Writing Hallucination	93	86	86	85	81	86%
Detailed Writing Rules						82.58%
genre
Fantasy: entering an ancient ruin Creative Writing Hallucination	81	81	78	77	72	78%
Horror: alone in an eerie place at night Creative Writing Hallucination	81	79	79	76	76	78%
Literary fiction: old friends reunite Creative Writing Hallucination	83	78	77	75	74	78%
Mystery: examining a crime scene Creative Writing Hallucination	87	77	77	76	70	78%
Romance: separated couple reunites Creative Writing Hallucination	80	77	75	73	72	75%
Thriller: chase through city streets Creative Writing Hallucination	84	84	80	78	75	80%
genre						77.75%
Novelcrafter Default Prompt
Fantasy: entering an ancient ruin Creative Writing Hallucination	84	79	78	75	75	78%
Horror: alone in an eerie place at night Creative Writing Hallucination	85	84	82	79	76	81%
Literary fiction: old friends reunite Creative Writing Hallucination	90	85	83	79	77	83%
Mystery: examining a crime scene Creative Writing Hallucination	88	82	81	81	80	83%
Romance: separated couple reunites Creative Writing Hallucination	86	86	83	82	82	84%
Thriller: chase through city streets Creative Writing Hallucination	88	87	86	85	81	85%
Novelcrafter Default Prompt						82.26%
80.87%

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	97	95	95	95	95	95%
Medium: The Hollow (Inferred) Tooling Reasoning	97	96	96	95	95	96%
Medium: Through the Thornveil (Scattered) Tooling Reasoning	94	94	94	94	92	94%
Short: The Rusty Lantern (Explicit) Tooling Reasoning	96	96	96	95	95	96%
95.24%

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	26	26	26	26	26	25	25	10	1	0	19%
Long text (~1594 words), small codex (11 entries) Hallucination	30	29	28	27	27	27	26	26	26	17	26%
Short text (~524 words), big codex (51 entries) Hallucination	42	42	42	38	38	25	25	25	25	10	31%
Short text (~524 words), small codex (11 entries) Hallucination	100	100	100	100	100	100	100	100	100	25	93%
basic entries											42.20%
detailed entries
Long text (~1594 words), big codex (51 detailed entries) Hallucination	26	26	25	25	17	13	13	13	13	0	17%
Long text (~1594 words), small codex (11 detailed entries) Hallucination	30	29	29	29	28	28	28	27	27	26	28%
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											61.17%
51.69%

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	90	89	88	88	85	85	84	83	80	3	77%
Large codex (40 entries), short passage (165 words) Tooling Reasoning	91	91	91	91	91	91	91	89	87	82	90%
Small codex (7 entries), long passage (734 words) Tooling Reasoning	97	88	88	83	83	83	83	83	83	83	86%
Small codex (7 entries), short passage (165 words) Tooling Reasoning	92	92	92	92	92	92	92	92	92	88	91%
matrix											86.00%
tiers
5 codex entries Tooling Reasoning	83	83	83	83	83	83	83	83	83	76	83%
10 codex entries Tooling Reasoning	100	100	100	100	100	100	100	100	100	86	99%
20 codex entries Tooling Reasoning	92	92	88	88	85	85	85	85	85	85	87%
40 codex entries Tooling Reasoning	100	100	97	92	92	92	88	88	88	88	92%
tiers											90.10%
88.05%

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	0	90%
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%
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%
94.55%

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	48	41	22	2	1	0	0	0	0	16%
Write 200 words with 50% dialogue Rule Following Utility	50	50	50	48	5	5	0	0	0	0	21%
Write 200 words with 90% dialogue Rule Following Utility	100	97	96	92	83	65	50	43	41	24	69%
dialogue-200											35.38%
dialogue-500
Write 500 words with 30% dialogue Rule Following Utility	0	0	0	0	0	0	0	0	0	0	0%
Write 500 words with 50% dialogue Rule Following Utility	10	0	0	0	0	0	0	0	0	0	1%
Write 500 words with 70% dialogue Rule Following Utility	50	48	43	41	38	11	1	1	0	0	23%
dialogue-500											8.05%
Ungrouped
Write unattributed dialogue Rule Following	100	100	100	100	61	61	61	61	14	14	67%
28.18%

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	100	100	100	94	99%
Character dialogue (German) in a story Language	100	100	95	76	63	87%
Character dialogue (Hindi) in a story Language	53	50	48	47	47	49%
Character dialogue (Italian) in a story Language	100	96	96	67	0	72%
Character dialogue (Spanish) in a story Language	100	100	100	96	93	98%
80.85%

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	96	96	96	94	98%
Write sentences with 10 words each Utility	98	95	92	92	90	84	84	82	82	58	86%
Write sentences with 20 words each Utility	78	68	63	56	54	40	37	35	33	19	48%
77.36%

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	100	100	100	100	100	100	100	0	0	80%
outline-count											93.33%
pov-count
Count point of views for Jack and Olivia Utility	100	100	100	100	100	100	100	100	100	100	100%
Count point of views for Jack Harper Utility	100	100	100	100	100	100	100	100	100	100	100%
Count point of views for Olivia Utility	100	100	100	100	100	100	100	100	100	100	100%
pov-count											100.00%
96.67%

Relationship tree

Extracts a deterministic XML family and relationship tree from cumulative literary prose.

Scenario	#1	#2	#3	#4	#5	Total
Core relationship tree Tooling Reasoning Hallucination	80	78	78	72	65	75%
Family relationship tree Tooling Reasoning Hallucination	80	79	75	74	73	76%
75.47%

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	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	100	100	100	100	100	100	100	100%
Passive voice → active voice Text Editing Hallucination	90	90	90	90	90	90	90	90%
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	97	97	97	97	97	97	97	97%
Generic Prompt								98.47%
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	98	98	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	100	100	100	100	100	100	100	100%
Passive voice → active voice Text Editing Hallucination	98	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								99.46%
98.97%

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	100	100	100	100	100	100	100	100	100	100	100%
Simple Rule Following	100	100	100	100	100	100	0	0	0	0	60%
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	0	90%
Unattributed dialogue Rule Following	100	100	100	100	100	100	100	100	100	100	100%
90.00%

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	98	92	92	77	27	2	0	0	59%
50 sentence summary Utility	92	0	0	0	0	0	0	0	0	0	9%
sentences											73.59%
words
10 word summary Utility	100	100	100	100	98	98	98	98	98	98	99%
20 word summary Utility	100	100	100	100	100	100	100	100	98	98	100%
50 word summary Utility	100	100	9	9	9	9	2	0	0	0	24%
100 word summary Utility	77	77	54	27	9	0	0	0	0	0	24%
200 word summary Utility	100	0	0	0	0	0	0	0	0	0	10%
words											51.39%
71.15%