Claude Sonnet 4 - NC Bench

claude-sonnet-4-20250514

Claude Sonnet 4

via anthropic

Release Date

May 22nd, 2025

Parameters

–

Context Size

200k

Creative writing

43.05%

Rule following

68.89%

Utility

95.00%

Mathematics

100.00%

Tooling

92.31%

Language

87.30%

Logic

93.75%

Data extraction

Extract key details from a given block of text.

Scenario	Run 1	Run 2	Run 3	Run 4	Run 5	Run 6	Run 7	Run 8	Run 9	Run 10	Total
Who's the tallest? 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 instrument does Lucy play? 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%
What's the correct time? 0-shot UtilityLogic	100%	100%	100%	100%	100%	100%	100%	100%	100%	100%	100%
Who's the sister? 0-shot UtilityLogic	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%
Indirect birth year 0-shot UtilityMathematicsLogic	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%
Highest-rated movie 0-shot Utility	100%	100%	100%	100%	100%	100%	100%	100%	100%	100%	100%
All valid emails 0-shot Utility	100%	100%	100%	100%	100%	100%	100%	100%	100%	100%	100%
95.83%

Dialogue tags

Various tasks related to dialogue tags in text.

Scenario	Run 1	Run 2	Run 3	Run 4	Run 5	Run 6	Run 7	Run 8	Run 9	Run 10	Total
Write unattributed dialogue 0-shot Creative writingRule following	100%	100%	100%	100%	100%	100%	100%	100%	100%	100%	100%
Write 200 words with 10% dialogue 0-shot Creative writingRule following	100%	97%	97%	96%	96%	95%	94%	88%	84%	60%	91%
Write 200 words with 50% dialogue 0-shot Creative writingRule following	84%	57%	53%	37%	33%	14%	6%	2%	0%	0%	29%
Write 200 words with 90% dialogue 0-shot Creative writingRule following	51%	44%	40%	21%	20%	20%	19%	19%	19%	18%	27%
Write 500 words with 30% dialogue 0-shot Creative writingRule following	87%	54%	50%	42%	17%	9%	8%	5%	0%	0%	27%
Write 500 words with 50% dialogue 0-shot Creative writingRule following	48%	47%	45%	44%	23%	4%	4%	1%	0%	0%	22%
Write 500 words with 70% dialogue 0-shot Creative writingRule following	50%	6%	3%	1%	0%	0%	0%	0%	0%	0%	6%
43.05%

Language Comprehension

Does the model understand more than just English?

Scenario	Run 1	Run 2	Run 3	Run 4	Run 5	Total
Friend got new kittens (Tagalog) 0-shot Language	100%	100%	100%	100%	100%	100%
Friend got new kittens (German) 0-shot Language	100%	100%	100%	0%	0%	60%
Asking for directions (German) 0-shot Language	100%	100%	100%	100%	100%	100%
Asking for directions (Dutch) 0-shot Language	100%	100%	100%	100%	100%	100%
90.00%

Language Writing

Can the model generate text in different languages?

Scenario	Run 1	Run 2	Run 3	Run 4	Run 5	Total
Character dialogue (Spanish) in a story 0-shot Language	100%	93%	93%	86%	85%	91%
Character dialogue (French) in a story 0-shot Language	93%	92%	82%	80%	77%	85%
Character dialogue (German) in a story 0-shot Language	100%	86%	85%	77%	64%	82%
Character dialogue (Italian) in a story 0-shot Language	94%	93%	92%	92%	83%	91%
Character dialogue (Hindi) in a story 0-shot Language	93%	92%	92%	53%	50%	76%
85.13%

Novel outline

Handle questions about the outline of a novel in various formats

Scenario	Run 1	Run 2	Run 3	Run 4	Run 5	Run 6	Run 7	Run 8	Run 9	Run 10	Total
Count chapters 0-shot ToolingUtility	100%	100%	100%	100%	100%	100%	100%	100%	100%	100%	100%
Count chapters (indented) 0-shot ToolingUtility	100%	100%	100%	100%	100%	100%	100%	100%	100%	100%	100%
Count acts 0-shot ToolingUtility	100%	100%	100%	100%	100%	100%	100%	100%	100%	100%	100%
Count acts (indented) 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%	0%	0%	80%
Count scenes (indented) 0-shot ToolingUtility	100%	100%	100%	100%	100%	100%	100%	100%	100%	0%	90%
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 Jack Harper (indented) 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%	0%	90%
Count point of views for Olivia (indented) 0-shot ToolingUtility	100%	100%	100%	100%	100%	100%	100%	100%	100%	0%	90%
Count point of views for Jack and Olivia 0-shot ToolingUtility	100%	100%	100%	100%	100%	50%	50%	50%	50%	0%	70%
Count point of views for Jack and Olivia (indented) 0-shot ToolingUtility	100%	100%	100%	100%	100%	100%	100%	50%	50%	0%	80%
91.67%

Tool usage within Novelcrafter

Output messages that are related to tool usage within Novelcrafter

Scenario	Run 1	Run 2	Run 3	Run 4	Run 5	Run 6	Run 7	Run 8	Run 9	Run 10	Total
Create alternate prose sections 0-shot ToolingUtility	100%	100%	100%	100%	100%	100%	100%	100%	100%	100%	100%
100.00%

N-Length Sentences

Write sentences with exactly N words

Scenario	Run 1	Run 2	Run 3	Run 4	Run 5	Run 6	Run 7	Run 8	Run 9	Run 10	Total
Write sentences with 5 words each 0-shot Rule following	100%	100%	100%	100%	97%	97%	93%	92%	91%	86%	96%
Write sentences with 10 words each 0-shot Rule following	100%	100%	100%	100%	97%	95%	90%	88%	74%	64%	91%
Write sentences with 20 words each 0-shot Rule following	83%	77%	72%	72%	66%	60%	23%	15%	12%	3%	48%
78.22%

Voice/dialogue sheets

Extract dialogue from given text as voice sheets.

Scenario	Run 1	Run 2	Run 3	Run 4	Run 5	Run 6	Run 7	Run 8	Run 9	Run 10	Total
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%
Multiple speakers 0-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	Run 1	Run 2	Run 3	Run 4	Run 5	Run 6	Run 7	Run 8	Run 9	Run 10	Total
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%	98%	98%	98%	98%	98%	98%	92%	98%
50 word summary 0-shot Rule following	98%	92%	92%	77%	54%	54%	27%	9%	0%	0%	50%
100 word summary 0-shot Rule following	98%	98%	98%	98%	77%	77%	77%	77%	9%	0%	71%
200 word summary 0-shot Rule following	77%	0%	0%	0%	0%	0%	0%	0%	0%	0%	8%
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%	98%	98%	98%	98%	9%	90%
50 sentence summary 0-shot Rule following	100%	92%	77%	27%	9%	0%	0%	0%	0%	0%	31%
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%
80.65%