Aion 3.0 - NC Bench

aion-labs/aion-3.0

Aion 3.0

via OpenRouter

Release Date

May 5th, 2026

Context Size

128k

Reasoning

Yes

Benchmark Cost

$17.97

Speed

48.0 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	87	86	82	80	79	83%
Horror: alone in an eerie place at night Creative Writing Hallucination	91	90	90	89	83	89%
Literary fiction: old friends reunite Creative Writing Hallucination	88	87	87	84	80	85%
Mystery: examining a crime scene Creative Writing Hallucination	92	90	88	86	84	88%
Romance: separated couple reunites Creative Writing Hallucination	95	90	87	84	82	88%
Thriller: chase through city streets Creative Writing Hallucination	90	89	88	87	87	88%
Detailed Writing Rules						86.81%
genre
Fantasy: entering an ancient ruin Creative Writing Hallucination	78	75	74	73	71	74%
Horror: alone in an eerie place at night Creative Writing Hallucination	90	85	82	81	81	84%
Literary fiction: old friends reunite Creative Writing Hallucination	80	80	76	75	74	77%
Mystery: examining a crime scene Creative Writing Hallucination	85	83	82	81	78	81%
Romance: separated couple reunites Creative Writing Hallucination	94	86	81	80	77	84%
Thriller: chase through city streets Creative Writing Hallucination	86	83	82	80	78	82%
genre						80.35%
Novelcrafter Default Prompt
Fantasy: entering an ancient ruin Creative Writing Hallucination	80	80	80	80	77	79%
Horror: alone in an eerie place at night Creative Writing Hallucination	85	84	83	81	79	82%
Literary fiction: old friends reunite Creative Writing Hallucination	85	83	82	81	80	82%
Mystery: examining a crime scene Creative Writing Hallucination	94	88	84	84	83	86%
Romance: separated couple reunites Creative Writing Hallucination	88	85	85	82	82	84%
Thriller: chase through city streets Creative Writing Hallucination	92	88	87	85	78	86%
Novelcrafter Default Prompt						83.47%
83.54%

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	99	97	97	96	96	97%
Medium: The Hollow (Inferred) Tooling Reasoning	98	97	97	96	95	97%
Medium: Through the Thornveil (Scattered) Tooling Reasoning	99	99	99	97	95	98%
Short: The Rusty Lantern (Explicit) Tooling Reasoning	100	100	100	99	96	99%
97.67%

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	17	17	17	17	17	58%
Long text (~1594 words), small codex (11 entries) Hallucination	100	100	100	100	100	100	100	100	50	25	88%
Short text (~524 words), big codex (51 entries) Hallucination	100	100	100	100	100	100	100	100	25	25	85%
Short text (~524 words), small codex (11 entries) Hallucination	100	100	100	100	100	100	100	100	100	25	93%
basic entries											80.83%
detailed entries
Long text (~1594 words), big codex (51 detailed entries) Hallucination	100	100	100	100	100	100	100	100	100	100	100%
Long text (~1594 words), small codex (11 detailed entries) Hallucination	100	100	100	100	100	100	100	100	100	100	100%
Short text (~524 words), big codex (51 detailed entries) Hallucination	100	100	100	100	100	25	25	25	25	17	62%
Short text (~524 words), small codex (11 detailed entries) Hallucination	100	100	100	100	100	100	100	100	25	17	84%
detailed entries											86.46%
83.65%

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	100	100	98	98	97	97	96	95	94	84	96%
Large codex (40 entries), short passage (165 words) Tooling Reasoning	100	100	100	100	97	97	97	97	96	96	98%
Small codex (7 entries), long passage (734 words) Tooling Reasoning	100	100	100	100	97	97	95	88	83	79	94%
Small codex (7 entries), short passage (165 words) Tooling Reasoning	100	100	100	100	100	100	97	97	92	88	97%
matrix											96.32%
tiers
5 codex entries Tooling Reasoning	100	100	100	100	100	100	100	100	100	100	100%
10 codex entries Tooling Reasoning	100	100	100	100	100	100	100	100	100	0	90%
20 codex entries Tooling Reasoning	97	97	97	96	96	96	96	92	92	89	95%
40 codex entries Tooling Reasoning	100	100	100	100	100	100	100	100	100	100	100%
tiers											96.19%
96.26%

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	50	0	85%
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	50	50	90%
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	50	95%
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	0	90%
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%
96.36%

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	88	74	52	50	50	45	28	18	61%
Write 200 words with 50% dialogue Rule Following Utility	100	100	100	98	50	50	50	26	22	18	61%
Write 200 words with 90% dialogue Rule Following Utility	100	95	66	50	44	38	36	28	19	18	50%
dialogue-200											57.12%
dialogue-500
Write 500 words with 30% dialogue Rule Following Utility	73	50	45	34	3	1	0	0	0	0	21%
Write 500 words with 50% dialogue Rule Following Utility	50	50	22	0	0	0	0	0	0	0	12%
Write 500 words with 70% dialogue Rule Following Utility	44	43	34	22	1	0	0	0	0	0	14%
dialogue-500											15.75%
Ungrouped
Write unattributed dialogue Rule Following	100	100	100	100	100	100	100	100	100	61	96%
44.95%

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	0	80%
Asking for directions (German) Language	100	100	100	100	100	100%
Friend got new kittens (German) Language	100	100	0	0	0	40%
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	96	99%
Character dialogue (German) in a story Language	100	100	95	87	58	88%
Character dialogue (Hindi) in a story Language	100	100	100	96	69	93%
Character dialogue (Italian) in a story Language	100	100	100	100	70	94%
Character dialogue (Spanish) in a story Language	100	100	100	100	71	94%
93.70%

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	99	100%
Write sentences with 10 words each Utility	100	100	100	100	100	78	74	74	38	35	80%
Write sentences with 20 words each Utility	100	100	100	100	100	100	100	100	100	37	94%
91.15%

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	100	0	90%
outline-count											96.67%
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	0	0	0	70%
pov-count											90.00%
93.33%

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	100	98	98	96	86	96%
Family relationship tree Tooling Reasoning Hallucination	89	83	79	46	46	69%
82.26%

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	98	70	95%
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	99	98	98	98	97	97	97	97%
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	99	97	97	96	93	92	96%
Generic Prompt								98.73%
Specific Prompt
Avoid said/asked/replied/answered Text Editing	100	100	100	100	100	100	33	90%
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	100	100	100	99	99	99	99	100%
Expand all contractions Text Editing	100	100	100	100	100	100	99	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	99	99	99	99	99	99	99	99%
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								98.80%
98.76%

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	0	0	0	0	0	0	40%
Simple Rule Following	100	100	100	100	100	100	100	100	0	0	80%
Simple (1-shot) 1-shot Rule Following	100	100	100	100	100	100	100	0	0	0	70%
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	100	100%
74.00%

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	100	100%
20 sentence summary Utility	100	100	100	100	100	100	100	100	100	0	90%
50 sentence summary Utility	100	100	100	100	100	100	100	100	100	100	100%
sentences											97.99%
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	100	100%
50 word summary Utility	100	100	100	100	100	100	100	100	92	0	89%
100 word summary Utility	100	100	100	100	100	100	100	100	100	100	100%
200 word summary Utility	100	100	100	100	100	100	100	98	0	0	80%
words											93.80%
96.85%