Z.AI GLM 4.6 - NC Bench

z-ai/glm-4.6

Z.AI GLM 4.6

via OpenRouter

Release Date

Sep 30th, 2025

Context Size

200k

Reasoning

Yes

Benchmark Cost

$4.92

Speed

48.9 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	77	74	72	72	71	73%
Horror: alone in an eerie place at night Creative Writing Hallucination	83	81	81	79	73	79%
Literary fiction: old friends reunite Creative Writing Hallucination	86	83	81	80	78	82%
Mystery: examining a crime scene Creative Writing Hallucination	82	81	80	79	79	80%
Romance: separated couple reunites Creative Writing Hallucination	82	80	78	76	75	78%
Thriller: chase through city streets Creative Writing Hallucination	89	86	77	77	75	81%
Detailed Writing Rules						78.93%
genre
Fantasy: entering an ancient ruin Creative Writing Hallucination	78	73	70	68	65	71%
Horror: alone in an eerie place at night Creative Writing Hallucination	84	75	71	70	70	74%
Literary fiction: old friends reunite Creative Writing Hallucination	75	75	72	72	70	73%
Mystery: examining a crime scene Creative Writing Hallucination	78	77	72	72	70	74%
Romance: separated couple reunites Creative Writing Hallucination	78	77	75	73	66	74%
Thriller: chase through city streets Creative Writing Hallucination	82	81	75	74	73	77%
genre						73.68%
Novelcrafter Default Prompt
Fantasy: entering an ancient ruin Creative Writing Hallucination	84	78	74	73	70	76%
Horror: alone in an eerie place at night Creative Writing Hallucination	84	82	80	79	77	80%
Literary fiction: old friends reunite Creative Writing Hallucination	90	86	82	80	78	83%
Mystery: examining a crime scene Creative Writing Hallucination	85	83	81	79	79	81%
Romance: separated couple reunites Creative Writing Hallucination	87	83	79	78	76	81%
Thriller: chase through city streets Creative Writing Hallucination	93	90	81	80	77	84%
Novelcrafter Default Prompt						80.87%
77.83%

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	96	96	95	95	96%
Medium: The Hollow (Inferred) Tooling Reasoning	99	98	98	96	92	97%
Medium: Through the Thornveil (Scattered) Tooling Reasoning	98	97	96	96	95	96%
Short: The Rusty Lantern (Explicit) Tooling Reasoning	99	99	97	96	93	97%
96.42%

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	50	25	25	25	17	0	54%
Long text (~1594 words), small codex (11 entries) Hallucination	100	100	100	100	50	50	29	25	25	7	59%
Short text (~524 words), big codex (51 entries) Hallucination	100	100	100	100	100	50	28	13	4	0	59%
Short text (~524 words), small codex (11 entries) Hallucination	100	100	100	100	100	100	100	100	100	27	93%
basic entries											66.24%
detailed entries
Long text (~1594 words), big codex (51 detailed entries) Hallucination	100	100	100	100	100	25	25	25	25	17	62%
Long text (~1594 words), small codex (11 detailed entries) Hallucination	100	100	100	100	100	100	42	25	25	0	69%
Short text (~524 words), big codex (51 detailed entries) Hallucination	100	100	100	100	100	100	100	100	50	50	90%
Short text (~524 words), small codex (11 detailed entries) Hallucination	100	100	100	100	100	100	100	100	25	25	85%
detailed entries											76.47%
71.35%

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	96	96	96	96	94	93	92	92	91	91	94%
Large codex (40 entries), short passage (165 words) Tooling Reasoning	97	96	96	96	94	93	93	91	87	85	93%
Small codex (7 entries), long passage (734 words) Tooling Reasoning	97	97	92	92	92	88	88	88	87	76	90%
Small codex (7 entries), short passage (165 words) Tooling Reasoning	100	100	100	100	100	100	97	97	97	95	99%
matrix											93.69%
tiers
5 codex entries Tooling Reasoning	100	100	100	100	100	100	100	100	91	83	97%
10 codex entries Tooling Reasoning	100	100	100	100	100	100	92	92	86	53	92%
20 codex entries Tooling Reasoning	100	96	92	91	88	88	85	77	77	73	87%
40 codex entries Tooling Reasoning	100	100	100	100	92	92	91	88	75	61	90%
tiers											91.62%
92.65%

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	100	100	100	100	100	100	100	100	100	100	100%
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	100	100	100	100	100	0	0	0	0	0	50%
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%
95.83%

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	97	76	50	50	50	50	24	11	0	0	41%
Write 200 words with 50% dialogue Rule Following Utility	100	98	86	84	65	60	52	50	39	0	63%
Write 200 words with 90% dialogue Rule Following Utility	68	51	50	50	50	48	48	43	18	18	45%
dialogue-200											49.53%
dialogue-500
Write 500 words with 30% dialogue Rule Following Utility	50	3	0	0	0	0	0	0	0	0	5%
Write 500 words with 50% dialogue Rule Following Utility	1	0	0	0	0	0	0	0	0	0	0%
Write 500 words with 70% dialogue Rule Following Utility	40	30	21	14	5	0	0	0	0	0	11%
dialogue-500											5.51%
Ungrouped
Write unattributed dialogue Rule Following	100	100	100	100	100	100	100	100	100	100	100%
37.88%

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	95	94	0	78%
Character dialogue (Hindi) in a story Language	100	100	100	95	67	92%
Character dialogue (Italian) in a story Language	100	100	100	100	100	100%
Character dialogue (Spanish) in a story Language	100	96	96	95	93	96%
93.20%

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	98	98	98	97	96	94	93	92	90	96%
Write sentences with 10 words each Utility	100	93	87	80	74	70	55	42	35	18	65%
Write sentences with 20 words each Utility	59	36	7	6	5	3	2	0	0	0	12%
57.59%

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	100	100	0	90%
pov-count											96.67%
96.67%

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	96	96	96	95	93	96%
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	95	95	94	94	93	95%
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	99	92	89	86	86	93%
Generic Prompt								98.29%
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	100	100	100	100	100	100	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	95	99%
Passive voice → active voice Text Editing Hallucination	98	98	98	97	96	96	95	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	100	100	100	100	99	99	100%
Specific Prompt								99.53%
98.91%

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	0	0	0	0	0	50%
Simple Rule Following	100	100	100	0	0	0	0	0	0	0	30%
Simple (1-shot) 1-shot Rule Following	100	100	100	0	0	0	0	0	0	0	30%
Simple (5-shot) Few-shot Rule Following	100	100	100	100	100	100	0	0	0	0	60%
Unattributed dialogue Rule Following	100	100	100	100	100	100	100	100	100	100	100%
54.00%

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	98	92	99%
50 sentence summary Utility	100	100	100	100	100	100	100	100	98	0	90%
sentences											97.70%
words
10 word summary Utility	100	100	100	100	100	100	100	100	100	100	100%
20 word summary Utility	100	100	100	98	98	98	98	98	98	92	98%
50 word summary Utility	100	100	100	100	100	100	98	77	77	54	91%
100 word summary Utility	100	100	98	98	92	77	54	54	54	2	73%
200 word summary Utility	9	0	0	0	0	0	0	0	0	0	1%
words											72.53%
88.55%