100K+
applications deployed on Google Cloud run
75%
engineers saving 8–10+ hours every week
The best AI for developers
Claude is the not-so-secret advantage for world class engineering teams and software companies.
74.5%
Opus 4.1 leads on SWE-bench Verified
60x
faster code review feedback for an AI platform customer
95%
reduction in time to run tests for an enterprise software customer
Write code with Claude
Get complete insight into your codebase and accelerate exceptional software.
I'll investigate the auth error. Let me look at the relevant files.
Examining auth-related files...
* src/services/authService.js
* src/components/Login.jsx
* src/store/authSlice.js
Running the login flow...
Error detected: "401 Unauthorized: Token expired"
Root cause:
* Token refresh mechanism not handling expired tokens correctly
* Refresh token missing from request header
* Improper error handling for 401 responses
Updating authService.js with proper refresh logic...
Updating request interceptor for 401 handling...
Testing the fix...
* Login successful ✓
* Token refresh working ✓
* Proper redirection on expired tokens ✓
Authentication error fixed! The login flow now properly handles token expiration.
Scale coding impact, not overhead
Write, test, and debug complex software with Claude, analyze codebases with expert-level reasoning via GitHub integration, delegate development tasks through computer use, and fast-track smarter engineering decisions in a shared workspace.
Explore agentic coding with Claude Code
Claude Code embeds Opus 4.1 right in your terminal, with deep codebase awareness and the ability to edit files and run commands directly in your environment.
Developers love Claude
“Just taught my fiancée how to use claude to write code that automates dumb tasks that have been making her work life miserable for months. She went from being downtrodden and skeptical to dancing around the room in about 15 minutes. END USER PROGRAMMING IS NOW.”
Kasey, @kaseyklimes
“Claude Sonnet 3.5 is utterly cracked for coding. This thing refactors like a monster. Not a single mistake, total understanding of every detail and intricacy. Just teleported my code forward in time, so many bloating functions cleaned up. It optimizes code so well. This is crazy.”
Nicolas Martel, @ryunuck
“Some interesting data on how Anthropic's Sonnet 3.5 seems to remain by far the most capable LLM for coding. Every single leading GenAI-powered IDE (Cursor, Windsurf, Zed, Copilot etc) favor this model. A good question: how is Claude so much better for code generation?”
Gergely Orosz, @GergelyOrosz
“Cursor + Claude 3.5 Sonnet has made it 10x more fun to be a CEO who codes.”
Sahil Lavingia, @shl
“I know this sounds cringe, but I literally have clammy hands and a racing heart because of how powerful Claude + Cursor is. Like I just made a whole new feature, frontend and backend, built on top of my own custom APIs without touching code, then I had it switch from a SwiftUI.”
Majd Taby, @jtaby
“I taught a friend who has never written code in her life how to use Claude to build a simple app and deploy it on Cloudflare today. Watching someone realize that they can now build software is a great experience. Enable everyone to build anything.”
Logan Grasby, @LoganGrasby
“With new Claude i officially feel like a fraud when i code, I’m the guy in the corner saying um nice job boss keep going.”
Nick, @nickcammarata
“Claude 3.5 sonnet is actually good at writing code, the AI posters were right, which makes me sick to my stomach, to have to hand those guys one.”
Dan Nolan, @dannolan
“The updated Claude Sonnet 3.5 is vastly superior to all OpenAI models for everyday tasks. Easiest subscription swap ever. Feels like OpenAI is fumbling their massive lead.”
Jonathan Munan, @JonathanMunan
“I'm an infra and backend guy, but with Claude 3.5 Sonnet being so good, I now feel like I’m an everything guy.”
Ethan, @ethancatzel
Build products with the Claude Developer Platform
Integrate Claude’s powerful AI capabilities into your apps and deliver production-grade solutions faster.
You are an AI assistant specialized in classifying customer support tickets. Your task is to analyze the content of a given ticket and assign it to the most appropriate category from a predefined list. You will also provide reasoning for your classification decision.
First, let's review the available categories:
<category_list>
{{CATEGORY_LIST}}
</category_list>
Now, here is the content of the support ticket you need to classify:
<ticket_content>
{{TICKET_CONTENT}}
</ticket_content>
Please follow these steps to complete the task:
– Carefully read and analyze the ticket content.
– Consider how the content relates to each of the available categories.
– Choose the most appropriate category for the ticket.
– Provide a detailed explanation of your reasoning process.
Use the following structure for your response:
<classification_analysis>
In this section, break down your thought process:
– Quote the most relevant parts of the ticket content.
– List each category and note how it relates to the ticket content.
– For each category, provide arguments for and against classifying the ticket into that category.
– Rank the top 3 most likely categories.
</classification_analysis>
<classification>
<category>Your chosen category goes here</category>
<reasoning>A concise summary of your reasoning for choosing this category</reasoning>
</classification>
Remember to be thorough in your analysis and clear in your explanation. Your goal is to provide an accurate classification with well-supported reasoning.
Deliver amazing AI experiences
- Customize how Claude fits into your solution with our API
- Improve and evaluate your prompts in the Workbench
- Build frontier intelligence into your applications
- Turn anyone into an AI developer with rich docs and tooling
See why companies choose Claude
“In our benchmark for junior developers, Claude Opus 4.1 shows roughly the same performance leap as the jump from Sonnet 3.7 to Sonnet 4. Opus 4.1 delivers a one standard deviation improvement over Opus 4. Very excited for our users to feel this difference.”
Jeff Wang, CEO
“Claude Opus 4 and Sonnet 4 are state of the art coding models. They’re a leap forward in complex codebase understanding, and we expect developers will experience across the board capability improvements.”
Michael Truell, Co-founder & CEO
“Anthropic has again set the gold standard for code-generation models with Claude Opus 4 and Sonnet 4. With a modest shift in prompting, we've seen the new models deliver cleaner, more precise high-quality output.”
Jared Palmer, VP of Product (AI)
“Claude Opus 4 offers truly advanced reasoning for coding. When our team deployed it on a complex open source project, it coded autonomously for nearly seven hours—a huge leap in AI capabilities that left the team amazed.”
Yusuke Kaji, General Manager (AI)
“Claude Opus 4 pushes the envelope once again on coding capabilities, handling complex multi-file changes without touching code you didn’t ask to modify. The improved precision in instruction following plus thinking mode gains show real potential to fundamentally change how Replit Agent works.”
Michele Catasta, President
“Claude Opus 4 is the first model that boosts code quality during editing and debugging in its agent, codename goose, without sacrificing performance or reliability.”
Bradley Axen, Principal Data & ML Engineer
“Claude Sonnet 4 has soared in agentic scenarios and we’re excited to introduce it as the base model for the new coding agent in GitHub Copilot. In early internal evaluations, the model demonstrated up to 10% improvement over the previous Sonnet generation, driven by adaptive tool use, precise instruction-following, and strong coding instincts.”
Thomas Dohmke, CEO
“Claude Opus 4 excels at solving complex challenges that other models can’t. It successfully handles critical actions that previous models have missed—that kind of reliability is transformative for our development workflows.”
Scott Wu, Co-founder & CEO
“Claude Sonnet 4 surpasses Sonnet 3.7 with higher success rates, more surgical code edits, and more tightly scoped changes. It works more carefully through complex tasks and delivers superior code quality—making it the ideal choice as the primary coding model in Augment Code.”
Guy Gur-Ari, Co-founder
“Against our in-house benchmark, Claude Opus 4 was a dramatic improvement in code generation abilities compared to Anthropic’s previous models. We're incredibly excited to see such progress, and for the product opportunities this unlocks.”
Amy Heineike, Founding AI Engineer
“Claude Sonnet 4’s code quality is incredible—it stays on track longer, understands problems deeply, and creates elegant solutions instead of brute-forcing fixes. This shows promise to be a substantial leap in software development!”
Beyang Liu, CTO
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