Claude Sonnet 4.6

anthropic/claude-sonnet-4.6

Claude Sonnet 4.6

via OpenRouter

Release Date

Feb 17th, 2026

Context Size

Benchmark Cost

$7.62

Speed

44.8 tok/s

Creative writing

79.45%

Rule following

82.45%

Utility

86.62%

Mathematics

50.00%

Tooling

84.79%

Language

100.00%

Logic

83.24%

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	89	89	87	86	84	87%
Horror: alone in an eerie place at night 0-shot Creative writingRule following	94	89	87	86	85	88%
Literary fiction: old friends reunite 0-shot Creative writingRule following	90	88	85	83	82	86%
Mystery: examining a crime scene 0-shot Creative writingRule following	93	93	88	88	86	90%
Romance: separated couple reunites 0-shot Creative writingRule following	86	86	84	84	80	84%
Thriller: chase through city streets 0-shot Creative writingRule following	95	94	89	87	84	90%
Detailed Writing Rules						87.45%
genre
Fantasy: entering an ancient ruin 0-shot Creative writingRule following	85	80	78	77	77	79%
Horror: alone in an eerie place at night 0-shot Creative writingRule following	85	82	81	80	78	81%
Literary fiction: old friends reunite 0-shot Creative writingRule following	82	80	78	77	73	78%
Mystery: examining a crime scene 0-shot Creative writingRule following	87	84	83	77	77	82%
Romance: separated couple reunites 0-shot Creative writingRule following	76	75	75	74	70	74%
Thriller: chase through city streets 0-shot Creative writingRule following	90	79	76	75	74	79%
genre						78.92%
Novelcrafter Default Prompt
Fantasy: entering an ancient ruin 0-shot Creative writingRule following	84	84	82	73	73	79%
Horror: alone in an eerie place at night 0-shot Creative writingRule following	87	86	82	81	75	82%
Literary fiction: old friends reunite 0-shot Creative writingRule following	82	81	80	79	78	80%
Mystery: examining a crime scene 0-shot Creative writingRule following	90	88	87	83	78	85%
Romance: separated couple reunites 0-shot Creative writingRule following	78	77	76	75	72	76%
Thriller: chase through city streets 0-shot Creative writingRule following	90	88	85	82	78	84%
Novelcrafter Default Prompt						81.09%
82.49%

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	94	94	92	92	91	91	90	90	90	88	91%
Large codex (40 entries), short passage (165 words) 0-shot ToolingUtilityLogicRule following	100	100	100	100	98	98	98	98	96	94	98%
Small codex (7 entries), long passage (734 words) 0-shot ToolingUtilityLogicRule following	100	97	92	92	92	92	92	92	92	92	93%
Small codex (7 entries), short passage (165 words) 0-shot ToolingUtilityLogicRule following	92	92	92	92	92	92	92	92	92	92	92%
matrix											93.51%
tiers
5 codex entries 0-shot ToolingUtilityLogicRule following	83	83	83	83	83	83	83	83	83	83	83%
10 codex entries 0-shot ToolingUtilityLogicRule following	86	86	86	86	86	86	86	86	86	86	86%
20 codex entries 0-shot ToolingUtilityLogicRule following	100	100	97	97	94	94	92	89	86	86	93%
40 codex entries 0-shot ToolingUtilityLogicRule following	97	97	97	97	97	97	97	97	88	88	95%
tiers											89.46%
91.48%

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	50	50	50	50	50	50	50	50	50	50	50%
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	50	50	50	50	50	50	50	50	50	50	50%
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	0	0	0	0	0	0	0	0	0	0	0%
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%
83.33%

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	99	99	98	94	90	87	87	79	76	76	88%
Write 200 words with 50% dialogue 0-shot Creative writingRule following	100	99	98	95	94	80	75	59	47	44	79%
Write 200 words with 90% dialogue 0-shot Creative writingRule following	100	93	86	84	83	76	73	73	67	67	80%
dialogue-200											82.64%
dialogue-500
Write 500 words with 30% dialogue 0-shot Creative writingRule following	93	62	58	55	53	50	50	50	48	45	56%
Write 500 words with 50% dialogue 0-shot Creative writingRule following	89	80	56	56	55	52	49	47	47	41	57%
Write 500 words with 70% dialogue 0-shot Creative writingRule following	72	67	66	65	52	42	41	41	31	5	48%
dialogue-500											53.83%
Ungrouped
Write unattributed dialogue 0-shot Creative writingRule following	100	100	100	100	100	100	100	100	61	61	92%
71.65%

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	100	100%
Friend got new kittens (Tagalog) 0-shot 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 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	100	100	100	100%
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%
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 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	97	74	74	74	74	74	74	74	74	79%
Write sentences with 20 words each 0-shot Rule following	87	77	37	34	28	23	22	16	1	0	32%
70.47%

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	0	0	0	0	0	0	0	30%
outline-count											76.67%
pov-count
Count point of views for Jack and Olivia 0-shot ToolingUtility	100	100	100	100	100	100	100	100	0	0	80%
Count point of views for Jack Harper 0-shot ToolingUtility	100	100	100	0	0	0	0	0	0	0	30%
Count point of views for Olivia 0-shot ToolingUtility	100	100	100	100	100	100	100	100	100	100	100%
pov-count											70.00%
73.33%

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	100	100	100	100	100	100%
Simple (1-shot) 1-shot Utility	100	100	100	100	100	100	100	100	100	100	100%
Simple (5-shot) Few-shot Utility	100	100	100	100	100	100	100	100	100	100	100%
Unattributed dialogue 0-shot Utility	100	100	100	100	100	100	100	100	100	100	100%
100.00%

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	98	98	98	92	92	54	0	0	73%
sentences											94.66%
words
10 word summary 0-shot Rule following	100	100	100	100	100	100	98	98	92	92	98%
20 word summary 0-shot Rule following	100	100	100	100	100	100	100	100	98	98	100%
50 word summary 0-shot Rule following	100	100	100	98	92	92	77	77	77	2	82%
100 word summary 0-shot Rule following	100	92	77	77	77	54	54	27	9	9	58%
200 word summary 0-shot Rule following	0	0	0	0	0	0	0	0	0	0	0%
words											67.41%
85.41%