Laguna S 2.1 - NC Bench

poolside/laguna-s-2.1

Laguna S 2.1

via OpenRouter

Release Date

Jul 2nd, 2026

Context Size

Reasoning

Benchmark Cost

$0.25

Speed

219.7 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	74	70	69	68	67	70%
Horror: alone in an eerie place at night Creative Writing Hallucination	80	76	75	71	69	74%
Literary fiction: old friends reunite Creative Writing Hallucination	84	83	82	80	72	80%
Mystery: examining a crime scene Creative Writing Hallucination	81	77	77	77	77	78%
Romance: separated couple reunites Creative Writing Hallucination	90	89	84	80	80	85%
Thriller: chase through city streets Creative Writing Hallucination	85	84	75	74	72	78%
Detailed Writing Rules						77.41%
genre
Fantasy: entering an ancient ruin Creative Writing Hallucination	75	71	71	66	61	69%
Horror: alone in an eerie place at night Creative Writing Hallucination	77	74	74	73	71	74%
Literary fiction: old friends reunite Creative Writing Hallucination	83	81	77	71	70	76%
Mystery: examining a crime scene Creative Writing Hallucination	82	75	73	72	68	74%
Romance: separated couple reunites Creative Writing Hallucination	84	82	80	75	75	79%
Thriller: chase through city streets Creative Writing Hallucination	79	77	77	76	73	76%
genre						74.67%
Novelcrafter Default Prompt
Fantasy: entering an ancient ruin Creative Writing Hallucination	68	68	63	63	62	65%
Horror: alone in an eerie place at night Creative Writing Hallucination	81	79	74	66	65	73%
Literary fiction: old friends reunite Creative Writing Hallucination	80	80	75	74	65	75%
Mystery: examining a crime scene Creative Writing Hallucination	81	79	76	76	72	77%
Romance: separated couple reunites Creative Writing Hallucination	80	77	74	74	70	75%
Thriller: chase through city streets Creative Writing Hallucination	76	76	73	72	70	73%
Novelcrafter Default Prompt						73.00%
75.03%

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	98	93	93	93	93	94%
Medium: The Hollow (Inferred) Tooling Reasoning	96	96	95	95	94	95%
Medium: Through the Thornveil (Scattered) Tooling Reasoning	97	95	95	92	92	94%
Short: The Rusty Lantern (Explicit) Tooling Reasoning	99	96	95	95	95	96%
94.77%

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	42	17	86%
Long text (~1594 words), small codex (11 entries) Hallucination	100	100	100	100	100	100	100	100	100	25	93%
Short text (~524 words), big codex (51 entries) Hallucination	100	100	100	100	100	100	50	29	29	27	73%
Short text (~524 words), small codex (11 entries) Hallucination	100	100	100	100	100	100	100	100	100	50	95%
basic entries											86.70%
detailed entries
Long text (~1594 words), big codex (51 detailed entries) Hallucination	100	100	100	100	100	100	100	100	100	33	93%
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	100	100	100	100	50	95%
Short text (~524 words), small codex (11 detailed entries) Hallucination	100	100	100	100	100	100	100	100	100	100	100%
detailed entries											97.08%
91.89%

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	99	95	94	3	3	3	3	3	–	–	38%
Large codex (40 entries), short passage (165 words) Tooling Reasoning	100	100	98	98	96	96	96	86	83	80	93%
Small codex (7 entries), long passage (734 words) Tooling Reasoning	93	93	90	90	88	88	80	79	73	70	85%
Small codex (7 entries), short passage (165 words) Tooling Reasoning	100	100	100	100	100	100	100	100	97	93	99%
matrix											78.69%
tiers
5 codex entries Tooling Reasoning	100	100	100	100	100	91	91	91	91	84	95%
10 codex entries Tooling Reasoning	100	94	86	86	86	86	79	79	72	53	82%
20 codex entries Tooling Reasoning	94	89	89	89	88	86	86	85	81	70	86%
40 codex entries Tooling Reasoning	100	100	100	100	100	97	97	92	88	87	96%
tiers											89.68%
84.19%

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	30	14	10	1	0	0	0	0	0	0	5%
Write 200 words with 50% dialogue Rule Following Utility	26	18	0	0	0	0	0	0	0	0	4%
Write 200 words with 90% dialogue Rule Following Utility	99	96	51	50	50	36	19	19	18	0	44%
dialogue-200											17.89%
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	34	18	0	0	0	0	0	0	0	0	5%
Write 500 words with 70% dialogue Rule Following Utility	34	32	7	0	0	0	0	0	0	0	7%
dialogue-500											6.42%
Ungrouped
Write unattributed dialogue Rule Following	100	100	100	100	61	61	61	14	0	0	60%
18.92%

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	100	100%
Character dialogue (German) in a story Language	100	100	100	100	100	100%
Character dialogue (Hindi) in a story Language	100	100	100	100	100	100%
Character dialogue (Italian) in a story Language	100	100	100	50	50	80%
Character dialogue (Spanish) in a story Language	100	100	100	100	95	99%
95.82%

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	91	91	89	87	82	81	79	76	74	85%
Write sentences with 10 words each Utility	77	76	75	71	64	55	46	34	20	14	53%
Write sentences with 20 words each Utility	52	31	7	2	0	0	0	0	0	0	9%
48.99%

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	0	0	0	0	0	0	0	0	20%
outline-count											73.33%
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	0	0	80%
pov-count											93.33%
83.33%

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	72	68	67	59	59	65%
Family relationship tree Tooling Reasoning Hallucination	70	65	60	58	57	62%
63.47%

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	89	89	89	89	89	89	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	99	99	99	98	70	70	70	86%
Expand all contractions Text Editing	99	99	99	99	99	99	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	93	91	85	85	93%
Passive voice → active voice Text Editing Hallucination	94	93	93	92	92	92	90	92%
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	93	92	92	92	89	89	92%
Generic Prompt								94.88%
Specific Prompt
Avoid said/asked/replied/answered Text Editing	67	67	67	67	67	67	67	67%
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	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	96	96	96	96	95	95	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	99	99	97	99%
Specific Prompt								95.60%
95.24%

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	0	0	0	0	0	0	0	0	20%
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	0	0	0	0	0	0	0	0	20%
Unattributed dialogue Rule Following	100	100	100	0	0	0	0	0	0	0	30%
28.00%

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	98	98	92	77	97%
50 sentence summary Utility	100	54	0	0	0	0	0	0	0	0	15%
sentences											82.39%
words
10 word summary Utility	100	100	100	100	100	98	98	98	98	98	99%
20 word summary Utility	100	100	100	98	98	92	77	77	77	77	90%
50 word summary Utility	27	27	27	2	0	0	0	0	0	0	8%
100 word summary Utility	100	100	54	9	9	0	0	0	0	0	27%
200 word summary Utility	100	0	0	0	0	0	0	0	0	0	10%
words											46.91%
72.81%