Claude Sonnet 4.6
Claude Sonnet 4.6 offers frontier performance for coding and computer use with a massive 1M token context window for only $3/1M tokens.
anthropicClaudeFebruary 17, 2026About Claude Sonnet 4.6
Learn about Claude Sonnet 4.6's capabilities, features, and how it can help you achieve better results.
A Generational Leap in Intelligence
Claude Sonnet 4.6 is Anthropic's most capable and versatile model to date, designed to serve as a high-performance workhorse for complex enterprise and developer workflows. Released on February 17, 2026, it represents a major generational leap over the 4.5 series, introducing human-level computer use capabilities and a massive 1-million-token context window in beta. The model is optimized for agentic tasks, meaning it doesn't just process text but can autonomously plan and execute multi-step operations across various software environments.
Technical Sophistication and Multimodality
Technically, Sonnet 4.6 bridges the gap between the speed of mid-tier models and the deep reasoning of the Opus class. It features Adaptive Thinking, allowing it to scale its internal reasoning effort based on task complexity. This model has become the new default for Claude Free and Pro users, offering flagship-level intelligence in coding, financial analysis, and document comprehension. It is truly native multimodal, supporting text, image, audio, and video inputs to process a variety of media processing tasks with state-of-the-art accuracy.
The New Industry Standard for Agents
With its elite performance-to-cost ratio, Sonnet 4.6 is positioned as the primary engine for AI agents. It achieves industry-leading scores on SWE-bench Verified (79.6%) and OSWorld-Verified (72.5%), demonstrating its superior ability to navigate real-world software engineering issues and complex operating system tasks. By providing near-Opus intelligence at a fraction of the cost, it empowers developers to build autonomous systems that were previously computationally or financially prohibitive.
Use Cases for Claude Sonnet 4.6
Discover the different ways you can use Claude Sonnet 4.6 to achieve great results.
Autonomous Software Engineering
Using Claude Code to refactor entire repositories and implement complex features with repository-wide context.
Human-Level Computer Use
Automating legacy software and web workflows by seeing the screen and interacting via virtual mouse and keyboard.
Financial Document Comprehension
Analyzing thousands of pages of filings and tables to reason through complex investment strategies or risks.
Real-Time Business Simulation
Running agentic simulations where the model manages a virtual business and optimizes for profitability.
Multilingual Technical Writing
Generating technical documentation across dozens of languages while maintaining perfect architectural spec compliance.
Frontend UI/UX Generation
Creating polished, modern dashboard interfaces with a focus on typography, color theory, and responsive layout.
Strengths
Limitations
API Quick Start
anthropic/claude-sonnet-4-6
import Anthropic from '@anthropic-ai/sdk';
const anthropic = new Anthropic({
apiKey: process.env.ANTHROPIC_API_KEY,
});
const msg = await anthropic.messages.create({
model: 'claude-sonnet-4-6',
max_tokens: 1024,
messages: [
{ role: 'user', content: 'Analyze this codebase for security vulnerabilities.' }
],
});
console.log(msg.content);Install the SDK and start making API calls in minutes.
What People Are Saying About Claude Sonnet 4.6
See what the community thinks about Claude Sonnet 4.6
“Claude Sonnet 4.6 hit 94% on our insurance benchmark, making it the highest-performing model we've tested for computer use.”
“The hype is real, this is hands down the best (and most fun) LLM I've ever used! Head and shoulders above what I've seen so far.”
“Claude Sonnet 4.6 is hilarious, not just 'funny at times'. Broadly warm, honest, and prosocial.”
“Sonnet 4.6 is so much better than Cline for coding tasks. I'm not even opening files manually anymore.”
“The 1M context window is a game changer for codebase migration. I just uploaded my whole legacy stack.”
“It handles complex spreadsheets and web forms with almost eerie precision. The Computer Use beta is finally ready.”
Videos About Claude Sonnet 4.6
Watch tutorials, reviews, and discussions about Claude Sonnet 4.6
“Sonnet 4.6 scored a higher score on GDP val, which measures real world meaningful tasks.”
“It is becoming more difficult to even know if these models are capable of CBRN things.”
“The speed to intelligence ratio here is essentially unmatched by any other model on the market.”
“Anthropic is clearly focusing on the agentic side of the house with this release.”
“The cost structure makes this the new default for any high-volume API developer.”
“This model is around twice as fast in comparison to the opus model from last month.”
“In conclusion, guys, this model is the best bang for your buck for enterprise coding.”
“The vision capabilities for interpreting complex architecture diagrams are significantly improved.”
“I was able to give it 50 files and it refactored the entire routing logic perfectly.”
“It feels much more human in its communication style compared to GPT-4o.”
“It's actually beating out Opus 4.6 in some areas while coming in at a 40% cheaper price point.”
“As we fill up the context window, once we hit about 150,000 tokens, the effectiveness tends to drop.”
“The adaptive reasoning feature allows you to basically toggle between speed and deep logic.”
“This release feels like the first true 'agent-first' model from Anthropic.”
“I would use this for everything except for maybe the absolute highest level creative writing.”
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Pro Tips for Claude Sonnet 4.6
Expert tips to help you get the most out of Claude Sonnet 4.6 and achieve better results.
Leverage Context Compaction
Enable the Compaction feature in the API to automatically summarize older conversation history for long sessions.
Use Thinking Tokens Strategically
For math or complex logic, set a higher budget for thinking tokens to let the model explore multiple reasoning paths.
Prompt for SPEC Compliance
Explicitly ask the model to follow modern architectural best practices, as it naturally reaches for updated tools.
Utilize Artifacts for UI
Encourage the model to use UI Artifacts to separate code generations from the chat thread for real-time iteration.
Testimonials
What Our Users Say
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CTO, AiChatSolutions
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Head of Growth, ScaleUp Labs
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Frequently Asked Questions About Claude Sonnet 4.6
Find answers to common questions about Claude Sonnet 4.6