Z.AI GLM 4.5 - NC Bench

z-ai/glm-4.5

Z.AI GLM 4.5

via OpenRouter

Release Date

Jul 25th, 2025

Context Size

131k

Reasoning

Benchmark Cost

$2.03

Speed

37.4 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	73	72	72	64	71%
Horror: alone in an eerie place at night Creative Writing Hallucination	88	85	81	78	67	80%
Literary fiction: old friends reunite Creative Writing Hallucination	85	83	79	79	77	81%
Mystery: examining a crime scene Creative Writing Hallucination	84	84	79	79	78	81%
Romance: separated couple reunites Creative Writing Hallucination	83	81	78	78	72	78%
Thriller: chase through city streets Creative Writing Hallucination	88	86	84	84	76	84%
Detailed Writing Rules						79.03%
genre
Fantasy: entering an ancient ruin Creative Writing Hallucination	72	69	69	68	68	69%
Horror: alone in an eerie place at night Creative Writing Hallucination	79	72	70	70	69	72%
Literary fiction: old friends reunite Creative Writing Hallucination	79	78	75	74	71	75%
Mystery: examining a crime scene Creative Writing Hallucination	79	73	73	72	66	73%
Romance: separated couple reunites Creative Writing Hallucination	78	74	71	70	67	72%
Thriller: chase through city streets Creative Writing Hallucination	83	79	78	78	72	78%
genre						73.24%
Novelcrafter Default Prompt
Fantasy: entering an ancient ruin Creative Writing Hallucination	72	71	69	69	67	70%
Horror: alone in an eerie place at night Creative Writing Hallucination	81	78	78	76	75	78%
Literary fiction: old friends reunite Creative Writing Hallucination	90	81	80	80	77	81%
Mystery: examining a crime scene Creative Writing Hallucination	84	82	80	72	70	78%
Romance: separated couple reunites Creative Writing Hallucination	84	80	79	78	77	80%
Thriller: chase through city streets Creative Writing Hallucination	84	78	77	75	74	78%
Novelcrafter Default Prompt						77.24%
76.50%

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	96	94	96%
Medium: The Hollow (Inferred) Tooling Reasoning	98	96	96	95	94	96%
Medium: Through the Thornveil (Scattered) Tooling Reasoning	96	95	95	94	93	95%
Short: The Rusty Lantern (Explicit) Tooling Reasoning	99	99	99	99	98	99%
96.09%

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	28	25	17	17	13	10	6	4	1	22%
Long text (~1594 words), small codex (11 entries) Hallucination	100	100	100	100	100	32	30	29	25	3	62%
Short text (~524 words), big codex (51 entries) Hallucination	100	100	100	38	29	25	25	25	4	2	45%
Short text (~524 words), small codex (11 entries) Hallucination	100	100	100	100	100	100	100	29	25	25	78%
basic entries											51.60%
detailed entries
Long text (~1594 words), big codex (51 detailed entries) Hallucination	100	100	100	100	100	100	31	29	25	17	70%
Long text (~1594 words), small codex (11 detailed entries) Hallucination	100	100	100	100	100	100	50	33	26	8	72%
Short text (~524 words), big codex (51 detailed entries) Hallucination	100	100	100	100	100	100	100	100	100	25	93%
Short text (~524 words), small codex (11 detailed entries) Hallucination	100	100	100	100	100	29	29	13	4	3	58%
detailed entries											73.01%
62.31%

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	92	82	81	78	76	75	75	73	72	66	77%
Large codex (40 entries), short passage (165 words) Tooling Reasoning	94	94	92	92	92	90	89	87	83	83	90%
Small codex (7 entries), long passage (734 words) Tooling Reasoning	90	88	88	88	88	88	84	83	79	75	85%
Small codex (7 entries), short passage (165 words) Tooling Reasoning	100	100	100	100	100	97	97	97	97	97	98%
matrix											87.54%
tiers
5 codex entries Tooling Reasoning	100	100	100	100	100	100	100	100	100	91	99%
10 codex entries Tooling Reasoning	100	100	100	100	100	92	86	86	86	86	94%
20 codex entries Tooling Reasoning	97	86	86	86	85	82	82	81	81	81	85%
40 codex entries Tooling Reasoning	93	88	88	88	80	79	76	75	53	50	77%
tiers											88.64%
88.09%

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	50	50	50	50	50	75%
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	0	0	0	0	0	0	0	0	0	0	0%
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%
89.58%

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	87	76	55	47	45	38	14	0	0	0	36%
Write 200 words with 50% dialogue Rule Following Utility	26	12	10	10	2	1	1	0	0	0	6%
Write 200 words with 90% dialogue Rule Following Utility	94	64	50	50	50	50	20	18	18	10	42%
dialogue-200											28.22%
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	46	1	0	0	0	0	0	0	0	0	5%
Write 500 words with 70% dialogue Rule Following Utility	14	4	0	0	0	0	0	0	0	0	2%
dialogue-500											2.18%
Ungrouped
Write unattributed dialogue Rule Following	100	100	100	100	100	100	100	100	100	61	96%
26.75%

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	0	80%
Friend got new kittens (German) Language	100	100	100	100	100	100%
Friend got new kittens (Tagalog) Language	100	100	100	100	100	100%
95.00%

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	100	92	98%
Character dialogue (Spanish) in a story Language	100	100	100	100	100	100%
99.67%

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	98	98	98	89	87	82	81	93%
Write sentences with 10 words each Utility	56	54	48	39	39	39	25	11	8	5	33%
Write sentences with 20 words each Utility	0	0	0	0	0	0	0	0	0	0	0%
41.92%

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	0	0	0	70%
Count point of views for Olivia Utility	100	100	100	100	0	0	0	0	0	0	40%
pov-count											70.00%
71.67%

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	96	96	96	93	90	90	90	93%
Expand all contractions Text Editing	100	67	67	67	67	67	67	71%
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	95	95	95	95	94	93	92	94%
POV shift: 3rd person to 1st person (Elena's perspective) Text Editing	100	100	100	100	100	100	99	100%
Tense rewriting: past to present Text Editing	97	93	93	93	89	89	89	92%
Generic Prompt								94.47%
Specific Prompt
Avoid said/asked/replied/answered Text Editing	100	100	100	100	100	100	83	98%
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	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	96	96	94	93	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	99	99	93	99%
Specific Prompt								99.21%
96.84%

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	0	0	0	0	0	0	0	0	0	10%
Simple Rule Following	100	100	100	100	100	100	100	100	100	100	100%
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	100	100%
Unattributed dialogue Rule Following	100	100	100	100	100	100	100	0	0	0	70%
76.00%

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	98	77	77	9	0	0	66%
50 sentence summary Utility	77	2	0	0	0	0	0	0	0	0	8%
sentences											74.82%
words
10 word summary Utility	100	100	100	100	100	100	98	98	98	98	99%
20 word summary Utility	100	100	100	100	100	100	100	98	98	98	99%
50 word summary Utility	100	98	98	98	92	54	54	54	27	9	68%
100 word summary Utility	100	100	92	27	27	27	9	9	2	0	39%
200 word summary Utility	0	0	0	0	0	0	0	0	0	0	0%
words											61.33%
75.44%