Gemini 3.5 Flash Lite (Reasoning)

google/gemini-3.5-flash-lite

Gemini 3.5 Flash Lite (Reasoning)

via OpenRouter

Release Date

Jul 21st, 2026

Context Size

Reasoning

Yes

Benchmark Cost

$1.46

Speed

208.7 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	87	85	84	80	77	83%
Horror: alone in an eerie place at night Creative Writing Hallucination	90	89	86	85	74	85%
Literary fiction: old friends reunite Creative Writing Hallucination	86	84	84	83	81	84%
Mystery: examining a crime scene Creative Writing Hallucination	87	82	80	80	80	82%
Romance: separated couple reunites Creative Writing Hallucination	89	87	84	82	78	84%
Thriller: chase through city streets Creative Writing Hallucination	89	86	86	85	82	86%
Detailed Writing Rules						83.67%
genre
Fantasy: entering an ancient ruin Creative Writing Hallucination	81	77	75	73	69	75%
Horror: alone in an eerie place at night Creative Writing Hallucination	86	83	79	77	76	80%
Literary fiction: old friends reunite Creative Writing Hallucination	79	77	72	69	68	73%
Mystery: examining a crime scene Creative Writing Hallucination	88	86	85	83	81	85%
Romance: separated couple reunites Creative Writing Hallucination	84	77	76	73	70	76%
Thriller: chase through city streets Creative Writing Hallucination	87	86	82	81	66	80%
genre						78.19%
Novelcrafter Default Prompt
Fantasy: entering an ancient ruin Creative Writing Hallucination	86	83	82	81	72	81%
Horror: alone in an eerie place at night Creative Writing Hallucination	91	89	87	83	81	86%
Literary fiction: old friends reunite Creative Writing Hallucination	89	89	88	87	83	87%
Mystery: examining a crime scene Creative Writing Hallucination	91	89	83	81	76	84%
Romance: separated couple reunites Creative Writing Hallucination	88	86	82	76	69	80%
Thriller: chase through city streets Creative Writing Hallucination	89	88	86	85	84	86%
Novelcrafter Default Prompt						84.14%
82.00%

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	88	88	87	87	87	87%
Medium: The Hollow (Inferred) Tooling Reasoning	98	98	98	97	96	97%
Medium: Through the Thornveil (Scattered) Tooling Reasoning	97	97	95	94	93	95%
Short: The Rusty Lantern (Explicit) Tooling Reasoning	93	92	85	76	76	84%
90.99%

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	35	28	28	28	26	26	13	13	10	3	21%
Long text (~1594 words), small codex (11 entries) Hallucination	50	50	50	50	38	38	35	25	17	17	37%
Short text (~524 words), big codex (51 entries) Hallucination	25	25	25	17	17	17	17	17	13	10	18%
Short text (~524 words), small codex (11 entries) Hallucination	50	25	25	25	25	25	25	25	25	25	28%
basic entries											25.86%
detailed entries
Long text (~1594 words), big codex (51 detailed entries) Hallucination	35	17	17	17	13	13	13	13	10	10	16%
Long text (~1594 words), small codex (11 detailed entries) Hallucination	50	50	38	33	32	31	31	30	6	6	31%
Short text (~524 words), big codex (51 detailed entries) Hallucination	25	25	25	25	25	25	25	25	25	25	25%
Short text (~524 words), small codex (11 detailed entries) Hallucination	25	25	25	25	25	25	25	25	25	25	25%
detailed entries											24.03%
24.94%

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	85	85	84	84	83	83	83	83	80	79	83%
Large codex (40 entries), short passage (165 words) Tooling Reasoning	96	96	96	94	91	91	91	91	89	89	92%
Small codex (7 entries), long passage (734 words) Tooling Reasoning	92	92	92	92	92	92	88	88	88	83	90%
Small codex (7 entries), short passage (165 words) Tooling Reasoning	100	100	100	100	100	100	100	100	100	100	100%
matrix											91.24%
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	86	58	33	33	81%
20 codex entries Tooling Reasoning	100	100	100	100	100	100	92	92	92	85	96%
40 codex entries Tooling Reasoning	92	92	92	92	92	92	92	92	87	83	90%
tiers											91.93%
91.58%

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	68	65	62	59	49	44	19	19	19	18	42%
Write 200 words with 50% dialogue Rule Following Utility	50	47	47	10	7	0	0	0	0	0	16%
Write 200 words with 90% dialogue Rule Following Utility	48	41	41	26	1	0	0	0	0	0	16%
dialogue-200											24.66%
dialogue-500
Write 500 words with 30% dialogue Rule Following Utility	5	3	1	0	0	0	0	0	0	0	1%
Write 500 words with 50% dialogue Rule Following Utility	0	0	0	0	0	0	0	0	0	0	0%
Write 500 words with 70% dialogue Rule Following Utility	3	0	0	0	0	0	0	0	0	0	0%
dialogue-500											0.40%
Ungrouped
Write unattributed dialogue Rule Following	100	100	100	100	100	100	100	100	100	100	100%
25.03%

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	0	0	0	0	20%
Friend got new kittens (Tagalog) Language	100	100	100	100	100	100%
80.00%

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	89	98%
Character dialogue (German) in a story Language	100	100	100	100	91	98%
Character dialogue (Hindi) in a story Language	100	100	71	67	67	81%
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%
95.38%

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	96	90	90	82	82	81	81	78	88%
Write sentences with 20 words each Utility	87	80	74	74	61	61	49	29	19	7	54%
80.68%

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	50	0	85%
Count point of views for Jack Harper Utility	100	100	100	100	100	100	100	100	100	0	90%
Count point of views for Olivia Utility	100	100	100	100	100	100	100	100	0	0	80%
pov-count											85.00%
79.17%

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	87	79	76	73	54	74%
Family relationship tree Tooling Reasoning Hallucination	77	73	70	68	63	70%
72.06%

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	67	67	90%
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	99	99	99	99	99	99	99	99%
Passive voice → active voice Text Editing Hallucination	94	94	93	93	91	88	86	91%
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	97	97	97	97	93	93	93	95%
Generic Prompt								97.26%
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	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	97	91	91	91	91	91	91	91%
Passive voice → active voice Text Editing Hallucination	98	97	97	97	97	97	97	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	100	100	100%
Specific Prompt								98.72%
97.99%

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	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%
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	98	100%
20 sentence summary Utility	100	100	100	100	100	100	98	98	92	77	97%
50 sentence summary Utility	100	100	100	98	92	92	0	0	0	0	58%
sentences											90.94%
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	98	98	100%
100 word summary Utility	92	92	92	92	77	54	27	27	27	0	58%
200 word summary Utility	0	0	0	0	0	0	0	0	0	0	0%
words											71.57%
85.58%