Z.AI GLM 5.2 (Reasoning, High)

z-ai/glm-5.2

Z.AI GLM 5.2 (Reasoning, High)

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Release Date

Jun 16th, 2026

Context Size

Reasoning

Yes

Benchmark Cost

$7.74

Speed

57.0 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	90	89	88	87	86	88%
Horror: alone in an eerie place at night Creative Writing Hallucination	90	89	87	86	82	87%
Literary fiction: old friends reunite Creative Writing Hallucination	90	88	86	86	82	86%
Mystery: examining a crime scene Creative Writing Hallucination	92	91	90	89	87	90%
Romance: separated couple reunites Creative Writing Hallucination	93	93	90	87	85	90%
Thriller: chase through city streets Creative Writing Hallucination	91	90	89	89	85	89%
Detailed Writing Rules						88.21%
genre
Fantasy: entering an ancient ruin Creative Writing Hallucination	80	76	75	70	70	74%
Horror: alone in an eerie place at night Creative Writing Hallucination	82	81	80	72	69	77%
Literary fiction: old friends reunite Creative Writing Hallucination	82	80	80	80	77	80%
Mystery: examining a crime scene Creative Writing Hallucination	84	80	79	77	75	79%
Romance: separated couple reunites Creative Writing Hallucination	80	80	79	75	73	77%
Thriller: chase through city streets Creative Writing Hallucination	90	81	81	81	80	83%
genre						78.26%
Novelcrafter Default Prompt
Fantasy: entering an ancient ruin Creative Writing Hallucination	86	84	83	76	75	81%
Horror: alone in an eerie place at night Creative Writing Hallucination	86	84	84	83	79	83%
Literary fiction: old friends reunite Creative Writing Hallucination	87	86	84	79	71	81%
Mystery: examining a crime scene Creative Writing Hallucination	87	84	82	81	80	83%
Romance: separated couple reunites Creative Writing Hallucination	85	83	80	79	78	81%
Thriller: chase through city streets Creative Writing Hallucination	94	90	86	85	84	88%
Novelcrafter Default Prompt						82.84%
83.10%

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	100	99	98	98	96	98%
Medium: The Hollow (Inferred) Tooling Reasoning	97	97	97	97	97	97%
Medium: Through the Thornveil (Scattered) Tooling Reasoning	99	99	99	98	98	99%
Short: The Rusty Lantern (Explicit) Tooling Reasoning	100	99	99	99	99	99%
98.32%

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	25	17	17	17	17	59%
Long text (~1594 words), small codex (11 entries) Hallucination	100	100	100	100	100	100	100	100	100	100	100%
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											87.92%
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	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											100.00%
93.96%

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	97	95	95	95	94	94	94	94	92	95%
Large codex (40 entries), short passage (165 words) Tooling Reasoning	100	100	100	98	98	96	96	96	94	92	97%
Small codex (7 entries), long passage (734 words) Tooling Reasoning	100	100	100	92	88	88	83	79	79	79	89%
Small codex (7 entries), short passage (165 words) Tooling Reasoning	100	100	100	100	100	100	100	97	97	97	99%
matrix											95.01%
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	100	100	100	100	100	100%
20 codex entries Tooling Reasoning	100	100	97	97	97	97	97	96	96	89	97%
40 codex entries Tooling Reasoning	100	100	100	100	100	100	100	100	100	100	100%
tiers											98.72%
96.86%

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%
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%
100.00%

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	100	100	100	100	100	100	100	100	100%
Write 200 words with 50% dialogue Rule Following Utility	100	100	100	100	100	100	100	100	100	99	100%
Write 200 words with 90% dialogue Rule Following Utility	98	97	94	93	91	85	82	76	66	48	83%
dialogue-200											94.26%
dialogue-500
Write 500 words with 30% dialogue Rule Following Utility	100	99	99	94	92	60	53	50	50	0	70%
Write 500 words with 50% dialogue Rule Following Utility	100	100	99	95	93	90	61	50	38	18	74%
Write 500 words with 70% dialogue Rule Following Utility	82	50	41	38	38	35	25	22	0	0	33%
dialogue-500											58.98%
Ungrouped
Write unattributed dialogue Rule Following	100	100	100	100	100	100	100	100	100	100	100%
79.96%

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	95	99%
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	100	100%
Character dialogue (Spanish) in a story Language	100	100	100	100	96	99%
99.64%

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	100	100%
Write sentences with 10 words each Utility	100	100	100	100	100	100	100	100	100	100	100%
Write sentences with 20 words each Utility	100	100	100	100	100	100	100	100	100	100	100%
100.00%

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	0	0	0	0	0	50%
pov-count											83.33%
90.00%

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	88	88	88	85	79	86%
Family relationship tree Tooling Reasoning Hallucination	87	85	84	84	84	85%
85.21%

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	99	99	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	74	96%
Passive voice → active voice Text Editing Hallucination	100	99	99	99	98	98	96	98%
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	99	99	99	99	99	99%
Generic Prompt								99.23%
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	99	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	100	99	99	99	99	99	98	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								99.90%
99.56%

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	67	97%
96.67%

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	100	100	100	100	100	100	0	90%
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	0	0	0	0	60%
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	100	100%
50 sentence summary Utility	100	100	100	100	100	100	100	98	98	0	90%
sentences											97.93%
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	77	98%
50 word summary Utility	100	100	100	100	100	100	100	98	77	77	95%
100 word summary Utility	100	100	100	100	100	100	100	100	100	54	95%
200 word summary Utility	100	100	100	100	100	100	100	100	100	77	98%
words											97.22%
98.13%