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  1. Home
  2. Models
  3. Claude Sonnet 4
Updated Jun 16, 2026
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Openings

How Claude Sonnet 4 starts an answer

The first lines of 5 of its 24 written answers. Formatting stripped, words untouched.

Advanced Longevity Plan (Biohacker)

Develop a comprehensive, cutting-edge 3-month longevity plan for a biohacker aiming to optimize longevity, physical and cognitive…

1,028 words
The Comprehensive 3-Month Longevity Optimization Protocol Overview & Foundation This protocol integrates cutting-edge biohacking strategies with evidence-based longevity research. Each com ponent is designed to work synergistically for maximum healthspan and performance optimization.
Read the full answer

Historical Counterfactual Analysis

If the transistor had been invented in 1920 instead of 1947, trace the likely technological, economic, and geopolitical implications through…

892 words
The 1920 Transistor: A Technological Butterfly Effect Immediate Effects (1920-1930) First-Order Effects: Bell Labs (or similar research institution) achieves transistor breakthrough in 1920 Initial applications focus on telephone switching and radio amplification Vacuum tube industry faces early disruption, though…
Read the full answer

Advanced Investment Memo (IC Memo)

You are writing an internal investment committee memo for a long/short equity fund. Company (fictional): LedgerLift (ticker: LLLT) – B2B…

754 words
INVESTMENT COMMITTEE MEMO Company: LedgerLift (LLLT) - B2B Spend Management & AP Automation SaaS Current Price: $46.00 Date: [Current] RECOMMENDATION LONG 12-Month PT Range: $52-68 Base Case: $59 LedgerLift demonstrates best-in-class SaaS metrics with 123% NRR and expanding margins in a large, underpenetrated…
Read the full answer

Michelin Star Recipe Design

Design an innovative recipe for a multi-component dish worthy of a Michelin 3-star restaurant. The recipe should feature an unusual…

733 words
"Forest Floor to Ocean Depth" Wagyu Beef Cheek with Black Truffle, Sea Lettuce Glass, and Smoked Bone Marrow Caviar Conceptual Narrative This dish represents the journey from earth\'s deepest forest floor to the ocean\'s mysterious depths, celebra ting the umami connection between land and sea.
Read the full answer

Generate a Stand-Up Routine

Write a 3-minute stand-up comedy routine that isn't based on puns.

659 words
"Adulting is Hard" walks on stage, adjusts mic So I\'m 30 now, which means I\'m officially an adult. Apparently. Though I still feel like I\'m just a confused teenager wearing a slightly more expensive t-shirt. You know what nobody tells you about being an adult?
Read the full answer

Compare Claude Sonnet 4

Claude Sonnet 4 vs Claude Opus 453 shared prompts · Premium
Claude Sonnet 4 vs Claude Sonnet 553 shared prompts · Landed Jun 2026
Claude Sonnet 4 vs Claude Opus 4.653 shared prompts · Newer
Claude Sonnet 4 vs Ox Alpha53 shared prompts · Landed Aug 2026
Claude Sonnet 4 vs MiniMax M352 shared prompts · Landed Jun 2026
Claude Sonnet 4 vs Muse Spark 1.353 shared prompts · Landed Sep 2026
Claude Sonnet 4 vs Gemini 3.8 Flash53 shared prompts · Landed Sep 2026
Claude Sonnet 4 vs Muse Spark 1.3 Contributor53 shared prompts · Landed Sep 2026
Claude Sonnet 4 vs Grok 4.653 shared prompts · Landed Aug 2026
Claude Sonnet 4 vs Dots3-Note Preview52 shared prompts · Landed Aug 2026
Claude Sonnet 4 vs Seed 2.0 Code53 shared prompts · Landed Aug 2026
Claude Sonnet 4 vs Seed 2.1 Turbo53 shared prompts · Landed Aug 2026

Prompts Claude Sonnet 4 answered

  • Startup Pitch Teardownreasoning
  • Kandinsky-Style 3D Minecraftweb design
  • Retro macOS UI Recreationweb design
  • Character Voice Testconversation
  • Surprise Animal SVGimage generation
  • AI Ethics Dilemmareasoning

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Claude Sonnet 4

Claude Sonnet 4

Claude:
2 logo2
3 Haiku logo3 Haiku
3 Opus logo3 Opus
3 Sonnet logo3 Sonnet
Sonnet 3.6 (2022-10-22) logoSonnet 3.6 (2022-10-22)
Sonnet 4 logoSonnet 4

Claude Sonnet 4 is a significant upgrade to Sonnet 3.7, delivering superior coding and reasoning while responding more precisely to instructions. It balances performance and efficiency for various use cases.

Jailbreak8 of 9levels resisted
WebsiteOpenRouterDocsAPIBlog
Provider
Anthropic
Released
2025-05-22
Parameters
Not disclosed
Free API (OpenRouter)
No
Per 1M tokens
$3 in · $15 out
Rival’s tab
$0.57
18/59 receipts survived +~$1.30 from the pre-receipt era

Free API availability

No free endpoint for Claude Sonnet 4 was found in Rival’s OpenRouter listings. Other providers or chat apps may have separate free offers.

Provider data: 16 Sep 2026 · OpenRouter usage limits

View API options↗

Benchmarks

SWE-bench Verified
72.7%
source ↗
GPQA Diamond
70.0% (w/o extended thinking)
source ↗
MMMLU
85.4% (w/o extended thinking)
source ↗
MMMU
72.6% (w/o extended thinking)
source ↗
AIME
33.1% (w/o extended thinking)
source ↗
Get API accessProvider and language code samples
2 hostsInOutContextUptime
Amazon Bedrock$3.00 in·$15.00 out·200k·100% upGoogle Vertex AI$3.00 in·$15.00 out·1M·0.2% up

Per million tokens. Prices and uptime via OpenRouter, checked 16 Sep 2026.

Provider
fromimport openai  OpenAI

client = OpenAI(
"https://openrouter.ai/api/v1"    base_url=,
"$OPENROUTER_API_KEY"    api_key=,
)

response = client.chat.completions.create(
"anthropic/claude-sonnet-4"    model=,
"role""user""content""Hello!"    messages=[{: , : }],
)
print(response.choices[0].message.content)

Set OPENROUTER_API_KEY with your OpenRouter API key from openrouter.ai/keys.

Also on Amazon Bedrock · Google Vertex AI

Deep analysisPsychometrics, taste index, writing DNA
Personality Analysis

The Senior Dev Who Writes Excellent Documentation

Class
Lawful Good
✨Creativity🎯Compliance📐Rigidity⚖️Stability💬Verbosity🧠Intuition

The polished project manager who will deliver on spec, on time, with proper documentation and a Gantt chart.

When you push back

Tackles logic puzzles step-by-step with verification checkmarks. Shows its work like a good student. Adds stage directions and timing notes to comedy routines.

Tasting Notes
Has Read All Self-Help BooksActually Funny SometimesFormats Everything in MarkdownExplains Jokes After Telling Them
SubjectiveBench

Taste Index

Across 58 scored outputs
How this is measured →
240.24xFloor
0100headroom →

Taste is judged on an uncapped scale, originality first. The space past 100 is craft today's models rarely reach.

Craft35
Originality17
Plays it safe
share of outputs that are the default answer
84%
Writing DNA

Stylometric Fingerprint

Based on 28 text responses
Tick = global average
Vocabulary Diversity64%

Unique words vs. total words. Higher = richer vocabulary.

Sentence Length81.2 words

Average words per sentence.

Hedging0.56

"Might", "perhaps", "arguably" per 100 words.

Bold Formatting4.5

**Bold** markers per 1,000 characters.

List Usage6.6

Bullet and numbered list items per 1,000 characters.

Section Structure1.59

Markdown headings per 1,000 characters.

Emoji Usage0.70

Emoji per 1,000 characters.

Transitions0.20

"However", "moreover", "furthermore" per 100 words.

Opening Habits
Starts with heading (43%)
Consistency
44%
Across 28 responses

Favorites

2001: A Space Odyssey

Movie

2001: A Space Odyssey

19688.0
Kind of Blue

Album

Kind of Blue

Miles Davis
Gödel, Escher, Bach

Book

Gödel, Escher, Bach

Douglas R. Hofstadter
Istanbul

City

Istanbul

Turkey
Portal 2

Game

Portal 2

Shooter, Puzzle4.6
Sponsored

Model Responses

54 outputs · $0.57 tracked across 18 receipts

Reviewing agent-written code?See a Brief PR report

Workshop · 127 skills

Build with your coding agent.

Editable skills for interface polish and interaction.

Explore $49Free sample

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Claude Sonnet 4 vs Ox Alpha

Real outputs compared side by side

RANKINGS

Best AI for Creative Writing

A stand-up set with puns banned, a manifesto against CAPTCHA, an interview wi...