Gemini 3.1 Flash Lite (Preview)

google/gemini-3.1-flash-lite-preview

Gemini 3.1 Flash Lite (Preview)

via OpenRouter

Release Date

Feb 19th, 2026

Context Size

Reasoning

Benchmark Cost

$0.96

Speed

171.0 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	75	69	68	68	67	69%
Horror: alone in an eerie place at night Creative Writing Hallucination	75	72	72	64	64	69%
Literary fiction: old friends reunite Creative Writing Hallucination	78	74	73	72	72	74%
Mystery: examining a crime scene Creative Writing Hallucination	78	76	74	73	72	75%
Romance: separated couple reunites Creative Writing Hallucination	85	79	78	77	67	77%
Thriller: chase through city streets Creative Writing Hallucination	77	71	71	70	67	71%
Detailed Writing Rules						72.54%
genre
Fantasy: entering an ancient ruin Creative Writing Hallucination	80	77	76	73	73	76%
Horror: alone in an eerie place at night Creative Writing Hallucination	70	69	66	66	65	67%
Literary fiction: old friends reunite Creative Writing Hallucination	78	74	72	67	66	71%
Mystery: examining a crime scene Creative Writing Hallucination	86	82	77	76	76	79%
Romance: separated couple reunites Creative Writing Hallucination	76	73	72	67	64	71%
Thriller: chase through city streets Creative Writing Hallucination	80	72	70	65	64	70%
genre						72.38%
Novelcrafter Default Prompt
Fantasy: entering an ancient ruin Creative Writing Hallucination	82	82	81	81	80	81%
Horror: alone in an eerie place at night Creative Writing Hallucination	84	82	71	71	67	75%
Literary fiction: old friends reunite Creative Writing Hallucination	84	81	78	76	76	79%
Mystery: examining a crime scene Creative Writing Hallucination	82	79	78	77	76	78%
Romance: separated couple reunites Creative Writing Hallucination	85	82	80	80	74	80%
Thriller: chase through city streets Creative Writing Hallucination	81	81	80	78	77	79%
Novelcrafter Default Prompt						78.76%
74.56%

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	95	94	94	93	93	94%
Medium: The Hollow (Inferred) Tooling Reasoning	96	96	96	96	95	96%
Medium: Through the Thornveil (Scattered) Tooling Reasoning	96	95	94	94	94	95%
Short: The Rusty Lantern (Explicit) Tooling Reasoning	94	94	94	92	92	93%
94.50%

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	10	10	10	10	10	10	8	8	5	9%
Long text (~1594 words), small codex (11 entries) Hallucination	100	100	100	100	100	100	42	25	25	13	70%
Short text (~524 words), big codex (51 entries) Hallucination	42	35	17	17	17	17	17	17	13	13	20%
Short text (~524 words), small codex (11 entries) Hallucination	25	25	17	17	17	17	13	13	13	13	17%
basic entries											29.17%
detailed entries
Long text (~1594 words), big codex (51 detailed entries) Hallucination	29	13	10	10	10	10	10	10	8	7	12%
Long text (~1594 words), small codex (11 detailed entries) Hallucination	33	13	13	13	13	10	10	10	10	8	13%
Short text (~524 words), big codex (51 detailed entries) Hallucination	50	25	25	25	25	17	17	13	13	13	22%
Short text (~524 words), small codex (11 detailed entries) Hallucination	50	25	25	25	25	25	25	25	25	17	27%
detailed entries											18.39%
23.78%

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	86	85	85	84	83	83	82	82	81	79	83%
Large codex (40 entries), short passage (165 words) Tooling Reasoning	97	93	89	89	89	89	89	89	89	87	90%
Small codex (7 entries), long passage (734 words) Tooling Reasoning	88	83	83	83	83	83	83	83	83	83	84%
Small codex (7 entries), short passage (165 words) Tooling Reasoning	100	100	100	100	100	100	100	100	100	100	100%
matrix											89.15%
tiers
5 codex entries Tooling Reasoning	100	100	100	100	100	100	100	91	91	91	97%
10 codex entries Tooling Reasoning	100	100	100	100	100	100	100	86	79	72	94%
20 codex entries Tooling Reasoning	88	88	88	88	88	88	88	88	88	88	88%
40 codex entries Tooling Reasoning	97	91	88	88	88	88	88	84	83	75	87%
tiers											91.62%
90.39%

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	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	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%
91.25%

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	98	68	68	68	68	68	68	68	68	68	71%
Write 200 words with 50% dialogue Rule Following Utility	50	50	50	50	50	50	50	50	49	48	50%
Write 200 words with 90% dialogue Rule Following Utility	50	50	50	50	50	50	50	48	47	47	49%
dialogue-200											56.68%
dialogue-500
Write 500 words with 30% dialogue Rule Following Utility	49	49	48	43	38	26	18	14	1	0	29%
Write 500 words with 50% dialogue Rule Following Utility	49	49	45	34	34	30	30	26	22	0	32%
Write 500 words with 70% dialogue Rule Following Utility	50	50	47	30	26	22	22	14	1	0	26%
dialogue-500											28.85%
Ungrouped
Write unattributed dialogue Rule Following	100	100	100	100	100	100	100	100	100	100	100%
50.94%

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	67	57	50	75%
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%
94.95%

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	0	0	0	0	0	0	40%
outline-count											80.00%
pov-count
Count point of views for Jack and Olivia Utility	100	100	100	100	100	100	100	50	50	0	80%
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	0	0	80%
pov-count											86.67%
83.33%

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	98	98	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	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	94	94	94	94	93	93	90	93%
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	96	96	96	96	96	96	96	96%
Generic Prompt								98.59%
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	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	98	100%
Passive voice → active voice Text Editing Hallucination	97	97	96	95	94	94	92	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	100	100	100	100	99	100%
Specific Prompt								99.32%
98.96%

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	0	0	0	0	0	0	0	30%
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	0	0	0	70%
Simple (5-shot) Few-shot Rule Following	100	100	100	100	100	100	100	100	100	0	90%
Unattributed dialogue Rule Following	100	100	100	100	100	100	0	0	0	0	60%
70.00%

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	98	100%
50 sentence summary Utility	100	100	100	100	100	100	100	77	77	77	93%
sentences											98.60%
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	100	98	98	100%
200 word summary Utility	98	92	77	77	54	54	27	9	2	0	49%
words											89.72%
95.51%