Free in your browser, on every device, through the API, and for the enterprise. Anthropic's family of models - Opus, Sonnet, Haiku wrapped in one warm interface that pauses before it speaks.
Four production models. Same SDK, same shape, same context window different speeds and intelligence levels for different jobs.
The most intelligent Claude. Built for the hardest reasoning, complex code synthesis, multi-step agents, and writing that holds up across thousands of words.
The everyday Claude. Right balance of intelligence, speed, and price for most tasks. The default in claude.ai. The model 90% of users actually pick.
The lightweight workhorse. Sub-second responses at $0.25 per million input tokens. Built to scale: chatbots, classifiers, content ops at production volume.
The previous-generation flagship. Still excellent for deep reasoning and agent orchestration. Recommended if you've already validated workflows on this version.
Open it in any browser. Install the apps for tighter OS integration. Sign in once and your chats, projects, and uploads sync across every device.
Zero install. Free tier with daily messages. The fastest path from "I have a question" to "Claude is answering it." Works on Chrome, Safari, Firefox, Edge — desktop and mobile.
Faster launch, global hotkeys, system-tray quick access, and offline drafting that syncs the moment you reconnect. Free downloads for every major platform.
The Claude API gives you access to every model — Opus, Sonnet, Haiku — through one shape. Tool use, vision, batch, streaming, and prompt caching all work the same way across each.
import anthropic client = anthropic.Anthropic() response = client.messages.create( model="claude-sonnet-4-6", max_tokens=1024, messages=[{ "role": "user", "content": "Hello, Claude!" }] ) print(response.content[0].text)
Eight starting points. Click any one, and the prompt opens in a fresh chat ready to edit or send.
Make this firm but not rude. [Paste yours.]
Try it →Walk me through what's actually happening here.
Try it →What would I miss if I only skimmed this?
Try it →Explain transformer attention to me — like I know calculus but not ML.
Try it →Help me write a casual blog post about [topic].
Try it →Pretend you disagree with me. Where am I wrong?
Try it →Translate to French — keep it warm and informal.
Try it →Find the trends, anomalies, and the story in this data.
Try it →No download required, no setup wizard, no credit card. The whole onboarding takes about thirty seconds.
Visit claude.ai in any browser. Sign in with Google, Apple, or email. The free tier unlocks instantly — no card needed.
Drop in a question, file, image, PDF, or whatever you're working on. Claude reads it, thinks about it, and responds in seconds.
Refine. Ask follow-ups. Push back. The conversation gets sharper as you go — Claude remembers context across the whole chat.
Here's what Claude does well, and where the tradeoffs are. We won't pretend it's perfect — that's how you end up disappointed.
Areas where Claude consistently outperforms or matches the best AI alternatives.
The honest list of things you'll need a different tool for, or a workaround.
A clear-eyed comparison across the four major AI assistants. Different tools win at different things — pick what fits your work.
| Claude | ChatGPT | Gemini | Copilot | |
|---|---|---|---|---|
| Free tier | ✓ | ✓ | ✓ | ✓ |
| Best free model | Sonnet 4.6 | GPT-default | Gemini Flash | GPT-4 (limited) |
| Writing quality | ★★★★★ | ★★★★ | ★★★★ | ★★★ |
| Coding ability | ★★★★★ | ★★★★ | ★★★★ | ★★★★ |
| Honest about uncertainty | ✓ Best | Mixed | Mixed | Mixed |
| Context window | 200K | ~128K | 1M+ | ~128K |
| Image generation | No | DALL·E | Imagen | DALL·E |
| API quality | Top tier | Top tier | Top tier | Limited |
| Best for | Writing, code, thinking | Versatility, plugins | Multimodal, search | Microsoft 365 integration |
Start free. Upgrade only if you need more. The starter tier is permanent — no trial timer, no credit card.
Your chats, projects, and uploaded files sync across every device — desktop, mobile, web. Sign in with the account you already have.
The questions we hear most often from people opening Claude for the first time.
Claude is an AI assistant built by Anthropic. It runs as a free chat at claude.ai, native apps on every major platform, an API for developers, and an enterprise platform for organizations. Powered by the Claude family of models — Opus (smartest), Sonnet (default), and Haiku (fastest).
Yes. The free tier at claude.ai gives you Sonnet 4.6 with daily message limits, file uploads, vision, and document Q&A — no credit card required. Pro ($20/mo) unlocks Opus 4.7 and 5× more usage; Max ($100/mo) is for heavy users; the API has $5 in free credit to start.
Visit claude.ai and sign in with Google, Apple, or email. The same account works on the web, the desktop apps (Mac/Windows/Linux), and the mobile apps (iOS/Android). Your chats sync automatically. Sign in directly →
Start with Sonnet 4.6 — it's the default for good reason. Switch to Opus 4.7 when you hit something Sonnet struggles with (deep reasoning, complex multi-file refactors). Use Haiku 4.5 via the API when you need fast, cheap responses at scale.
Yes — both via claude.ai in any mobile browser, and as native apps on iOS 16+ and Android 9+. Same account, same chats, same projects across every device.
Yes — even on the free tier. Upload PDFs, images, screenshots, spreadsheets, code files, and text documents. Claude reads them and answers questions about the content.
Different strengths. Claude tends to be stronger at writing quality, long-document handling, careful reasoning, and admitting when it doesn't know something. ChatGPT has a wider plugin/tool ecosystem and includes image generation. Many people use both. See the full comparison →
No. Claude understands images (you can upload one and ask about it) but doesn't generate them. For image generation, look at DALL·E in ChatGPT, Imagen in Gemini, Midjourney, or Stable Diffusion.
Yes — web search is available in Claude.ai (more extensively on paid plans). Claude can pull current information, cite sources, and combine search results with its own reasoning.
Anthropic publishes its data policies in detail. By default, Pro and Max conversations aren't used to train models. Free conversations may be reviewed for safety. Enterprise plans can opt into zero data retention. Full details at anthropic.com/privacy.
Sign up at console.anthropic.com, generate a key, and you're ready. New accounts get $5 in free credit. Install the SDK (pip install anthropic or npm i @anthropic-ai/sdk) and you can make your first call in five minutes. See the API section →
Over 100. Claude is strong in English, Spanish, French, German, Mandarin, Japanese, Portuguese, Arabic, Russian, Korean, Hindi, and many others — including translation between them with cultural and tonal nuance.
Whatever you'd Google next, paste it into Claude instead. The whole loop — sign in, ask, get an answer — takes less time than reading this paragraph.
Free forever · No credit card · Works in any browser · 100+ languages · Built by Anthropic