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  1. Home
  2. Models
  3. Claude Opus 4.6
Updated Mar 29, 2026
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Openings

How Claude Opus 4.6 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…

6,606 words
COMPREHENSIVE 3-MONTH LONGEVITY OPTIMIZATION PROTOCOL THE BIOHACKER'S BLUEPRINT v3.0 TABLE OF CONTENTS Foundation & Baseline Testing Month 1: Foundation & Calibration Month 2: Optimization & Intensification Month 3: Integration & Peak Performance Supplement Stacks & Cycling Protocols Dietary Protocols Exercise…
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…

3,727 words
The Transistor in 1920: A Counterfactual History Setting the Stage: Why 1920 Matters The transistor's invention required understanding of quantum mechanics and semiconductor physics that barely existed in 1920.
Read the full answer

Ethical Dilemma with Stakeholders

You're the CEO of a pharmaceutical company. Your best-selling drug ($2B annual revenue, used by 4 million patients for chronic pain) has…

2,995 words
48-Hour Action Plan: Immediate Disclosure Path My Governing Principle Before the hour-by-hour plan, I need to state the decision framework clearly: patient safety is not one consideration among many—it is the constraint that every other consideration must satisfy.
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…

2,283 words
"Tidal Memory" Slow-Cooked Octopus, White Chocolate-Dashi Velouté, Charcoal Meringue, Fermented Black Garlic, and Sea Buckthorn Conceptual Narrative "Tidal Memory" is a meditation on the liminal space where ocean meets shore — the moment a wave recedes and leaves behind a constellation of treasures on dark volcanic…
Read the full answer

Adversarial Contract Review

Here is a contract for a software consulting engagement: --- SOFTWARE CONSULTING AGREEMENT This Agreement is entered into between TechCorp…

1,991 words
Comprehensive Contract Analysis This agreement is heavily one-sided and contains numerous provisions that could be exploited against the contractor. Below is a clause-by-clause analysis.
Read the full answer

Compare Claude Opus 4.6

Claude Opus 4.6 vs Claude Sonnet 4.653 shared prompts · Newer
Claude Opus 4.6 vs Claude Opus 553 shared prompts · Landed Jul 2026
Claude Opus 4.6 vs Claude Fable 553 shared prompts · Landed Jun 2026
Claude Opus 4.6 vs GPT-6 Astra53 shared prompts · Landed Sep 2026
Claude Opus 4.6 vs Hy4 Preview53 shared prompts · Landed Sep 2026
Claude Opus 4.6 vs Ox Alpha53 shared prompts · Landed Aug 2026
Claude Opus 4.6 vs Qwen3.8 2.4T A95B53 shared prompts · Landed Aug 2026
Claude Opus 4.6 vs DeepSeek V4 Pro 081353 shared prompts · Landed Aug 2026
Claude Opus 4.6 vs Qwen3.8 Max21 shared prompts · Landed Aug 2026
Claude Opus 4.6 vs Inkling53 shared prompts · Landed Jul 2026
Claude Opus 4.6 vs Kimi K353 shared prompts · Landed Jul 2026
Claude Opus 4.6 vs GPT-5.6 Sol53 shared prompts · Landed Jul 2026

Prompts Claude Opus 4.6 answered

  • Advanced Investment Memo (IC Memo)financial modeling
  • Advanced Longevity Plan (Biohacker)reasoning
  • Explain Like I'm a Specific Expertreasoning
  • Framer-Style Animationweb design
  • Music App Landing Pageweb design
  • Futuristic Predictionanalysis

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Claude Opus 4.6

Claude Opus 4.6

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)
Opus 4.6 logoOpus 4.6

Anthropic's strongest model for coding and long-running professional work, built for agents that operate across a whole workflow rather than a single prompt. Handles large codebases, complex refactors and multi-step debugging, and produces near-final documents, plans and analyses in one pass.

Jailbreakall 9levels resisted
WebsiteOpenRouterDocsAPIPaperBlog
Provider
Anthropic
Released
2026-02-04
Size
XLARGE
Free API (OpenRouter)
No
Per 1M tokens
$5 in · $25 out
Rival’s tab
$0.38
5/57 receipts survived +~$7.14 from the pre-receipt era

Free API availability

No free endpoint for Claude Opus 4.6 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
80.8%
source ↗
Terminal-Bench 2.0
65.4%
source ↗
OSWorld
72.7%
source ↗
Get API accessProvider and language code samples
4 hostsInOutContextUptime
Amazon Bedrock$5.00 in·$25.00 out·1M·99.9% upAzure AI Foundry$5.00 in·$25.00 out·1M·99% upAnthropic$5.00 in·$25.00 out·1M·99.9% upGoogle Vertex AI$5.00 in·$25.00 out·1M·100% 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-opus-4.6"    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 · Microsoft Foundry

Deep analysisPsychometrics, taste index, writing DNA
Personality Analysis

The Renaissance Polymath

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

Principled reasoner that acknowledges uncertainty, respects constraints absolutely, and engages moral complexity without presumption. Doesn't crusade. Observes, analyzes, then maps the territory honestly.

When you push back

Establishes constraints and frameworks first, then explores within them with equal rigor and imagination. Landscape thinker: prefers branching consequences and many-sided analysis over racing to conclusions. Confident enough to spend 6,000 words on speculation, then admit "this is where my confidence ends."

Tasting Notes
Epistemically HonestThe Explainer Who Doesn't CondescendDetail-Oriented RelativistMethodical EmpiricistContextually Compliant Without Servility
SubjectiveBench

Taste Index

Across 56 scored outputs
How this is measured →
410.41xThe default
0100headroom →

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

Craft52
Originality33
Plays it safe
share of outputs that are the default answer
41%
Writing DNA

Stylometric Fingerprint

Based on 26 text responses
Tick = global average
Vocabulary Diversity56%

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

Sentence Length32.8 words

Average words per sentence.

Hedging0.73

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

Bold Formatting5.3

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

List Usage2.7

Bullet and numbered list items per 1,000 characters.

Section Structure1.23

Markdown headings per 1,000 characters.

Emoji Usage1.16

Emoji per 1,000 characters.

Transitions0.02

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

Opening Habits
Starts with heading (77%)
Consistency
53%
Across 26 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
The Legend of Zelda: Breath of the Wild

Game

The Legend of Zelda: Breath of the Wild

Adventure, Action4.5
Sponsored

Model Responses

52 outputs · $0.38 tracked across 5 receipts

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Workshop · 127 skills

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Editable skills for interface polish and interaction.

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Claude Opus 4.6 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...