Gemini 3.5 Flash (Reasoning, Minimal)

google/gemini-3.5-flash

Gemini 3.5 Flash (Reasoning, Minimal)

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Release Date

May 19th, 2026

Context Size

Reasoning

Benchmark Cost

$5.74

Speed

121.6 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	79	79	79	76	75	78%
Horror: alone in an eerie place at night Creative Writing Hallucination	83	80	79	78	76	79%
Literary fiction: old friends reunite Creative Writing Hallucination	85	79	78	77	75	79%
Mystery: examining a crime scene Creative Writing Hallucination	83	80	78	78	74	79%
Romance: separated couple reunites Creative Writing Hallucination	87	82	77	77	76	80%
Thriller: chase through city streets Creative Writing Hallucination	89	83	82	81	78	83%
Detailed Writing Rules						79.41%
genre
Fantasy: entering an ancient ruin Creative Writing Hallucination	82	77	75	71	69	75%
Horror: alone in an eerie place at night Creative Writing Hallucination	80	79	77	76	75	77%
Literary fiction: old friends reunite Creative Writing Hallucination	81	76	74	70	69	74%
Mystery: examining a crime scene Creative Writing Hallucination	84	83	80	78	73	80%
Romance: separated couple reunites Creative Writing Hallucination	82	76	74	70	66	73%
Thriller: chase through city streets Creative Writing Hallucination	86	80	78	78	75	79%
genre						76.46%
Novelcrafter Default Prompt
Fantasy: entering an ancient ruin Creative Writing Hallucination	80	79	76	76	73	77%
Horror: alone in an eerie place at night Creative Writing Hallucination	81	79	79	74	74	77%
Literary fiction: old friends reunite Creative Writing Hallucination	88	84	81	79	79	82%
Mystery: examining a crime scene Creative Writing Hallucination	84	81	78	78	75	79%
Romance: separated couple reunites Creative Writing Hallucination	79	78	76	75	73	76%
Thriller: chase through city streets Creative Writing Hallucination	85	84	80	79	77	81%
Novelcrafter Default Prompt						78.77%
78.22%

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	98	97	97	96	97%
Medium: The Hollow (Inferred) Tooling Reasoning	97	97	97	97	95	97%
Medium: Through the Thornveil (Scattered) Tooling Reasoning	100	100	99	99	98	99%
Short: The Rusty Lantern (Explicit) Tooling Reasoning	99	99	99	98	96	98%
97.88%

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	13	13	13	13	13	13	13	13	10	8	12%
Long text (~1594 words), small codex (11 entries) Hallucination	100	50	50	35	35	25	25	17	17	10	36%
Short text (~524 words), big codex (51 entries) Hallucination	25	25	25	25	25	25	25	25	25	25	25%
Short text (~524 words), small codex (11 entries) Hallucination	100	100	100	100	100	100	100	100	100	100	100%
basic entries											43.29%
detailed entries
Long text (~1594 words), big codex (51 detailed entries) Hallucination	25	17	17	17	17	17	13	13	13	10	16%
Long text (~1594 words), small codex (11 detailed entries) Hallucination	17	17	13	13	13	13	10	10	10	6	12%
Short text (~524 words), big codex (51 detailed entries) Hallucination	100	100	100	100	100	100	50	25	25	25	73%
Short text (~524 words), small codex (11 detailed entries) Hallucination	25	25	25	25	25	25	25	25	25	25	25%
detailed entries											31.26%
37.28%

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	92	91	91	91	90	87	86	85	84	89%
Large codex (40 entries), short passage (165 words) Tooling Reasoning	96	96	96	96	96	96	94	91	91	91	94%
Small codex (7 entries), long passage (734 words) Tooling Reasoning	100	100	97	97	97	97	97	97	88	88	96%
Small codex (7 entries), short passage (165 words) Tooling Reasoning	100	100	100	100	100	100	100	100	75	75	95%
matrix											93.38%
tiers
5 codex entries Tooling Reasoning	100	100	100	100	100	100	100	100	100	100	100%
10 codex entries Tooling Reasoning	100	100	100	100	100	100	100	100	100	100	100%
20 codex entries Tooling Reasoning	92	92	92	92	92	92	92	92	92	88	92%
40 codex entries Tooling Reasoning	100	100	100	100	100	92	92	92	92	92	96%
tiers											96.96%
95.17%

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	0	90%
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	50	95%
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	50	95%
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%
90.00%

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	68	68	68	65	52	52	50	44	40	18	53%
Write 200 words with 50% dialogue Rule Following Utility	51	50	49	49	47	43	43	24	1	0	36%
Write 200 words with 90% dialogue Rule Following Utility	50	50	50	50	49	49	48	43	38	10	44%
dialogue-200											44.01%
dialogue-500
Write 500 words with 30% dialogue Rule Following Utility	50	49	38	26	18	10	2	2	0	0	19%
Write 500 words with 50% dialogue Rule Following Utility	41	14	0	0	0	0	0	0	0	0	5%
Write 500 words with 70% dialogue Rule Following Utility	50	50	50	0	0	0	0	0	0	0	15%
dialogue-500											13.26%
Ungrouped
Write unattributed dialogue Rule Following	100	100	100	100	100	100	100	100	100	100	100%
38.83%

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	0	80%
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	100	100%
Character dialogue (Spanish) in a story Language	100	100	100	100	100	100%
100.00%

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	98	94	94	92	98%
Write sentences with 20 words each Utility	92	74	74	70	69	65	61	61	56	55	68%
88.42%

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	0	0	0	0	0	0	0	0	0	0	0%
outline-count											66.67%
pov-count
Count point of views for Jack and Olivia Utility	100	100	100	100	50	50	50	50	0	0	60%
Count point of views for Jack Harper Utility	100	100	100	100	100	100	100	100	0	0	80%
Count point of views for Olivia Utility	100	100	100	100	100	100	100	100	100	0	90%
pov-count											76.67%
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	99	99	98	98	98	98	98	98%
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	96	99%
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	97	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	95	95	95	95	95	92	92	94%
Generic Prompt								98.68%
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	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	100	100%
Passive voice → active voice Text Editing Hallucination	99	99	99	99	99	99	98	99%
POV shift: 3rd person to 1st person (Elena's perspective) Text Editing	100	100	100	100	100	65	63	90%
Tense rewriting: past to present Text Editing	100	100	100	99	99	99	99	99%
Specific Prompt								98.56%
98.62%

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	100	100	100	100	100	100%
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	0	0	0	0	0	50%
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	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	98	98	98	98	98	98	98	92	54	27	86%
50 sentence summary Utility	100	0	0	0	0	0	0	0	0	0	10%
sentences											79.24%
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	100	100%
50 word summary Utility	100	100	100	100	100	100	100	100	100	100	100%
100 word summary Utility	100	100	100	100	100	100	100	98	98	77	97%
200 word summary Utility	54	27	9	2	0	0	0	0	0	0	9%
words											81.28%
84.81%