Laguna XS 2.1 - NC Bench

poolside/laguna-xs-2.1

Laguna XS 2.1

via OpenRouter

Release Date

Jul 2nd, 2026

Context Size

262k

Reasoning

Benchmark Cost

$0.22

Speed

307.3 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	76	76	73	65	62	70%
Horror: alone in an eerie place at night Creative Writing Hallucination	86	82	82	73	71	79%
Literary fiction: old friends reunite Creative Writing Hallucination	81	81	78	76	74	78%
Mystery: examining a crime scene Creative Writing Hallucination	82	81	81	76	72	78%
Romance: separated couple reunites Creative Writing Hallucination	86	84	77	77	71	79%
Thriller: chase through city streets Creative Writing Hallucination	79	79	78	77	76	78%
Detailed Writing Rules						77.09%
genre
Fantasy: entering an ancient ruin Creative Writing Hallucination	76	73	71	70	70	72%
Horror: alone in an eerie place at night Creative Writing Hallucination	89	83	75	72	70	78%
Literary fiction: old friends reunite Creative Writing Hallucination	84	82	79	77	75	79%
Mystery: examining a crime scene Creative Writing Hallucination	85	80	75	72	70	76%
Romance: separated couple reunites Creative Writing Hallucination	82	81	80	77	76	79%
Thriller: chase through city streets Creative Writing Hallucination	85	84	82	81	80	82%
genre						77.88%
Novelcrafter Default Prompt
Fantasy: entering an ancient ruin Creative Writing Hallucination	75	73	68	65	61	68%
Horror: alone in an eerie place at night Creative Writing Hallucination	84	78	74	73	72	76%
Literary fiction: old friends reunite Creative Writing Hallucination	82	82	81	80	79	81%
Mystery: examining a crime scene Creative Writing Hallucination	82	82	76	76	73	78%
Romance: separated couple reunites Creative Writing Hallucination	89	81	81	80	78	82%
Thriller: chase through city streets Creative Writing Hallucination	82	82	80	78	76	80%
Novelcrafter Default Prompt						77.48%
77.48%

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	91	90	89	88	86	89%
Medium: The Hollow (Inferred) Tooling Reasoning	92	91	90	89	88	90%
Medium: Through the Thornveil (Scattered) Tooling Reasoning	92	91	90	89	88	90%
Short: The Rusty Lantern (Explicit) Tooling Reasoning	93	92	90	89	87	90%
89.70%

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	25	25	85%
Short text (~524 words), big codex (51 entries) Hallucination	100	100	100	100	100	100	100	100	100	100	100%
Short text (~524 words), small codex (11 entries) Hallucination	100	100	100	100	100	100	100	100	100	25	93%
basic entries											92.50%
detailed entries
Long text (~1594 words), big codex (51 detailed entries) Hallucination	100	100	100	100	100	100	100	25	25	25	78%
Long text (~1594 words), small codex (11 detailed entries) Hallucination	100	100	100	100	100	100	100	100	25	13	84%
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											90.31%
91.41%

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	86	84	81	81	78	75	73	72	70	3	70%
Large codex (40 entries), short passage (165 words) Tooling Reasoning	95	93	92	89	88	87	86	85	82	3	80%
Small codex (7 entries), long passage (734 words) Tooling Reasoning	93	93	88	84	80	80	79	79	75	75	83%
Small codex (7 entries), short passage (165 words) Tooling Reasoning	100	97	97	97	93	93	93	90	88	84	93%
matrix											81.60%
tiers
5 codex entries Tooling Reasoning	100	100	100	100	100	100	100	100	100	83	98%
10 codex entries Tooling Reasoning	100	100	100	100	100	94	89	86	86	86	94%
20 codex entries Tooling Reasoning	97	94	92	92	89	88	86	86	86	81	89%
40 codex entries Tooling Reasoning	100	97	93	92	91	88	84	84	75	0	80%
tiers											90.51%
86.06%

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%
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%
95.45%

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	50	50	50	3	1	1	0	0	0	20%
Write 200 words with 50% dialogue Rule Following Utility	55	50	50	50	40	38	22	7	3	0	31%
Write 200 words with 90% dialogue Rule Following Utility	100	99	98	91	89	50	50	48	38	2	66%
dialogue-200											39.41%
dialogue-500
Write 500 words with 30% dialogue Rule Following Utility	50	18	0	0	0	0	0	0	0	0	7%
Write 500 words with 50% dialogue Rule Following Utility	41	2	2	0	0	0	0	0	0	0	4%
Write 500 words with 70% dialogue Rule Following Utility	60	54	49	37	28	17	7	4	0	0	26%
dialogue-500											12.27%
Ungrouped
Write unattributed dialogue Rule Following	100	100	100	100	61	61	61	61	61	61	76%
33.06%

Language Comprehension

Does the model understand more than just English?

Scenario	#1	#2	#3	#4	#5	Total
Asking for directions (Dutch) Language	100	0	0	0	0	20%
Asking for directions (German) Language	100	100	100	0	0	60%
Friend got new kittens (German) Language	100	0	0	0	0	20%
Friend got new kittens (Tagalog) Language	100	100	0	0	0	40%
35.00%

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	100	100	0	80%
Character dialogue (Hindi) in a story Language	100	100	100	100	54	91%
Character dialogue (Italian) in a story Language	100	100	100	100	100	100%
Character dialogue (Spanish) in a story Language	100	100	100	100	100	100%
93.93%

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	94	93	84	82	73	66	64	59	57	45	72%
Write sentences with 10 words each Utility	96	92	87	85	81	73	67	59	43	18	70%
Write sentences with 20 words each Utility	65	56	55	47	41	19	9	2	0	0	30%
57.18%

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	50	0	0	0	0	55%
Count point of views for Jack Harper Utility	100	100	100	100	100	100	100	100	100	0	90%
Count point of views for Olivia Utility	100	100	100	100	100	0	0	0	0	0	50%
pov-count											65.00%
79.17%

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	75	70	68	63	56	66%
Family relationship tree Tooling Reasoning Hallucination	60	58	55	52	47	54%
60.37%

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	100	99	98	98	98	95	90	97%
Expand all contractions Text Editing	100	100	100	100	99	99	99	100%
Location rename: market square, outer ring, bridge, northern mines Text Editing	100	100	96	96	96	96	96	97%
Multi-character gender swap: Priya(F)->Rohan(M), Mara unchanged Text Editing	100	100	100	99	99	75	73	92%
Passive voice → active voice Text Editing Hallucination	89	86	79	77	67	67	34	71%
POV shift: 3rd person to 1st person (Elena's perspective) Text Editing	100	100	100	100	100	98	97	99%
Tense rewriting: past to present Text Editing	100	99	99	98	96	95	91	97%
Generic Prompt								94.87%
Specific Prompt
Avoid said/asked/replied/answered Text Editing	100	100	100	100	97	89	67	93%
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	98	96	95	93	93	80	94%
Expand all contractions Text Editing	100	99	98	98	98	63	62	89%
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	99	95	95	99%
Passive voice → active voice Text Editing Hallucination	97	97	95	95	93	92	89	94%
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	97	96	95	89	89	95%
Specific Prompt								95.91%
95.39%

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	67	67	67	67	67	83%
83.33%

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	100	100	100	100	0	0	0	0	0	0	40%
Simple (1-shot) 1-shot Rule Following	100	100	100	100	100	100	100	100	100	0	90%
Simple (5-shot) Few-shot Rule Following	100	100	100	100	100	100	100	100	0	0	80%
Unattributed dialogue Rule Following	100	0	0	0	0	0	0	0	0	0	10%
44.00%

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	98	98	100%
20 sentence summary Utility	100	98	98	92	54	54	27	27	27	9	59%
50 sentence summary Utility	98	27	9	0	0	0	0	0	0	0	13%
sentences											74.37%
words
10 word summary Utility	100	100	100	100	100	100	100	100	98	92	99%
20 word summary Utility	100	100	100	100	98	92	77	54	54	54	83%
50 word summary Utility	100	100	92	77	77	54	0	0	0	0	50%
100 word summary Utility	98	92	77	54	9	0	0	0	0	0	33%
200 word summary Utility	100	100	92	92	77	54	9	0	0	0	52%
words											63.49%
76.10%