Gemini 3.1 Pro (Preview)

google/gemini-3.1-pro-preview

Gemini 3.1 Pro (Preview)

via OpenRouter

Release Date

Feb 19th, 2026

Context Size

Benchmark Cost

$33.13

Speed

82.0 tok/s

Creative writing

87.93%

Rule following

93.71%

Utility

93.24%

Mathematics

100.00%

Tooling

99.58%

Language

94.89%

Logic

94.61%

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 0-shot Creative writingRule following	88	85	84	80	79	83%
Horror: alone in an eerie place at night 0-shot Creative writingRule following	88	87	87	86	84	86%
Literary fiction: old friends reunite 0-shot Creative writingRule following	85	84	83	82	80	83%
Mystery: examining a crime scene 0-shot Creative writingRule following	86	84	82	82	82	83%
Romance: separated couple reunites 0-shot Creative writingRule following	87	84	84	83	81	84%
Thriller: chase through city streets 0-shot Creative writingRule following	86	84	84	84	81	84%
Detailed Writing Rules						83.91%
genre
Fantasy: entering an ancient ruin 0-shot Creative writingRule following	87	81	79	79	77	80%
Horror: alone in an eerie place at night 0-shot Creative writingRule following	91	86	84	83	82	85%
Literary fiction: old friends reunite 0-shot Creative writingRule following	89	82	80	76	74	80%
Mystery: examining a crime scene 0-shot Creative writingRule following	91	88	82	79	75	83%
Romance: separated couple reunites 0-shot Creative writingRule following	85	84	77	76	73	79%
Thriller: chase through city streets 0-shot Creative writingRule following	92	89	88	85	78	87%
genre						82.37%
Novelcrafter Default Prompt
Fantasy: entering an ancient ruin 0-shot Creative writingRule following	85	84	83	83	82	83%
Horror: alone in an eerie place at night 0-shot Creative writingRule following	88	87	87	87	86	87%
Literary fiction: old friends reunite 0-shot Creative writingRule following	84	84	83	83	83	83%
Mystery: examining a crime scene 0-shot Creative writingRule following	84	83	81	81	81	82%
Romance: separated couple reunites 0-shot Creative writingRule following	85	84	83	82	80	83%
Thriller: chase through city streets 0-shot Creative writingRule following	88	87	87	86	86	87%
Novelcrafter Default Prompt						84.27%
83.52%

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) 0-shot ToolingUtilityLogicRule following	98	98	97	97	97	96	96	96	95	94	96%
Large codex (40 entries), short passage (165 words) 0-shot ToolingUtilityLogicRule following	100	100	100	100	100	100	97	97	97	97	99%
Small codex (7 entries), long passage (734 words) 0-shot ToolingUtilityLogicRule following	100	100	100	100	100	100	100	100	97	95	99%
Small codex (7 entries), short passage (165 words) 0-shot ToolingUtilityLogicRule following	100	100	100	100	100	100	100	100	100	100	100%
matrix											98.66%
tiers
5 codex entries 0-shot ToolingUtilityLogicRule following	100	100	100	100	100	100	100	100	100	100	100%
10 codex entries 0-shot ToolingUtilityLogicRule following	100	100	100	100	100	100	100	100	100	100	100%
20 codex entries 0-shot ToolingUtilityLogicRule following	100	100	100	100	100	100	100	100	96	96	99%
40 codex entries 0-shot ToolingUtilityLogicRule following	100	100	100	100	100	100	100	100	100	100	100%
tiers											99.79%
99.22%

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 0-shot Utility	100	100	100	100	100	100	100	100	100	100	100%
Contextual pronoun 0-shot Utility	100	100	100	100	100	100	100	100	100	100	100%
Fruits excluding citrus 0-shot Utility	100	100	100	100	100	100	100	100	100	100	100%
Future event time 0-shot UtilityLogic	100	100	100	100	100	100	100	100	100	100	100%
Guess the pet 0-shot UtilityLogic	100	100	100	100	100	100	100	100	100	100	100%
Highest-rated movie 0-shot Utility	100	100	100	100	100	100	100	100	100	100	100%
Indirect birth year 0-shot UtilityMathematicsLogic	100	100	100	100	100	100	100	100	100	100	100%
What instrument does Lucy play? 0-shot UtilityLogic	100	100	100	100	100	100	100	100	100	100	100%
What's the color of the car? 0-shot UtilityLogic	100	100	100	100	100	100	100	100	100	100	100%
What's the correct time? 0-shot UtilityLogic	100	100	0	0	0	0	0	0	0	0	20%
Who's the sister? 0-shot UtilityLogic	100	100	100	100	100	100	100	100	100	100	100%
Who's the tallest? 0-shot UtilityLogic	100	100	100	100	100	100	100	100	100	100	100%
93.33%

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 0-shot Creative writingRule following	100	100	100	100	100	100	100	100	100	100	100%
Write 200 words with 50% dialogue 0-shot Creative writingRule following	100	100	100	100	100	100	100	100	100	100	100%
Write 200 words with 90% dialogue 0-shot Creative writingRule following	100	100	100	100	100	100	100	100	100	89	99%
dialogue-200											99.64%
dialogue-500
Write 500 words with 30% dialogue 0-shot Creative writingRule following	100	100	100	100	100	100	100	100	100	60	96%
Write 500 words with 50% dialogue 0-shot Creative writingRule following	100	100	100	100	100	100	100	100	100	100	100%
Write 500 words with 70% dialogue 0-shot Creative writingRule following	100	100	100	100	100	100	100	100	100	100	100%
dialogue-500											98.66%
Ungrouped
Write unattributed dialogue 0-shot Creative writingRule following	100	100	100	100	100	100	100	100	100	100	100%
99.27%

Language Comprehension

Does the model understand more than just English?

Scenario	#1	#2	#3	#4	#5	Total
Asking for directions (Dutch) 0-shot Language	100	100	100	100	100	100%
Asking for directions (German) 0-shot Language	100	100	100	100	100	100%
Friend got new kittens (German) 0-shot Language	100	100	100	100	0	80%
Friend got new kittens (Tagalog) 0-shot 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 0-shot Language	100	100	100	100	100	100%
Character dialogue (German) in a story 0-shot Language	100	100	100	100	100	100%
Character dialogue (Hindi) in a story 0-shot Language	100	100	67	53	50	74%
Character dialogue (Italian) in a story 0-shot Language	100	100	100	100	100	100%
Character dialogue (Spanish) in a story 0-shot Language	100	100	100	100	100	100%
94.80%

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 0-shot Rule following	100	100	100	100	100	100	100	100	100	100	100%
Write sentences with 10 words each 0-shot Rule following	100	100	100	100	100	100	100	100	100	100	100%
Write sentences with 20 words each 0-shot Rule following	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 0-shot ToolingUtility	100	100	100	100	100	100	100	100	100	100	100%
Count chapters 0-shot ToolingUtility	100	100	100	100	100	100	100	100	100	100	100%
Count scenes 0-shot ToolingUtility	100	100	100	100	100	100	100	100	100	100	100%
outline-count											100.00%
pov-count
Count point of views for Jack and Olivia 0-shot ToolingUtility	100	100	100	100	100	100	100	100	100	100	100%
Count point of views for Jack Harper 0-shot ToolingUtility	100	100	100	100	100	100	100	100	100	100	100%
Count point of views for Olivia 0-shot ToolingUtility	100	100	100	100	100	100	100	100	100	100	100%
pov-count											100.00%
100.00%

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 0-shot ToolingUtility	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 0-shot Utility	100	100	100	100	100	100	100	100	100	100	100%
Simple 0-shot Utility	100	100	100	100	100	0	0	0	0	0	50%
Simple (1-shot) 1-shot Utility	100	100	100	100	100	0	0	0	0	0	50%
Simple (5-shot) Few-shot Utility	100	100	100	100	100	100	100	0	0	0	70%
Unattributed dialogue 0-shot Utility	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 0-shot Rule following	100	100	100	100	100	100	100	100	100	100	100%
3 paragraph summary 0-shot Rule following	100	100	100	100	100	100	100	100	100	100	100%
5 paragraph summary 0-shot Rule following	100	100	100	100	100	100	100	100	100	100	100%
paragraphs											100.00%
sentences
1 sentence summary 0-shot Rule following	100	100	100	100	100	100	100	100	100	100	100%
3 sentence summary 0-shot Rule following	100	100	100	100	100	100	100	100	100	100	100%
10 sentence summary 0-shot Rule following	100	100	100	100	100	100	100	100	100	100	100%
20 sentence summary 0-shot Rule following	100	100	100	100	100	100	100	100	100	100	100%
50 sentence summary 0-shot Rule following	100	100	100	100	100	100	100	100	100	100	100%
sentences											100.00%
words
10 word summary 0-shot Rule following	100	100	100	100	100	100	100	100	100	100	100%
20 word summary 0-shot Rule following	100	100	100	100	100	100	100	100	100	100	100%
50 word summary 0-shot Rule following	100	100	100	100	100	100	100	100	100	100	100%
100 word summary 0-shot Rule following	100	100	100	100	100	100	100	100	100	100	100%
200 word summary 0-shot Rule following	100	100	100	100	100	100	100	100	100	100	100%
words											100.00%
100.00%