Fast enough to keep up with you. Smart enough to ship real work. Free in your browser. The recommended Claude — and the one most people never feel the need to upgrade from.
Sonnet 4.6 is what 90% of people actually need 90% of the time - fast, capable, and genuinely smart, without the cost or latency of a flagship.
Sonnet responds in seconds for most prompts. Quick enough for an iterative back-and-forth, smart enough that the back-and-forth is worth it.
Try a quick prompt →Production-grade code. Editorial-quality writing. Nuanced analysis. Sonnet handles the work most professionals actually bring to AI every day.
See what it can do →Available on the free tier with daily usage. Most people never hit a wall. The ones who do, upgrade for more — not better — capability.
See pricing →Sonnet's range is the reason it's the default. Pick any of these and bring a real task - Sonnet was designed for them.
Writing, debugging, refactoring, and explaining code in 30+ languages.
Emails, essays, reports, blog posts, scripts — at editorial quality.
Data interpretation, document review, research synthesis, summaries.
Read and reason about images, PDFs, screenshots, charts, and diagrams.
High-quality translation across 100+ languages with cultural nuance.
Tool use, MCP, multi-step workflows. Sonnet's the agent default.
Concept explanation, homework help, study guides, exam prep.
Idea generation, naming, creative angles, constructive critique.
Whether you click a chat or call an API, Sonnet shows up the same way: fast, useful, and ready.
Open claude.ai and Sonnet 4.6 is already selected. Or pass claude-sonnet-4-6 in any API call. Zero migration, zero config.
import anthropic client = anthropic.Anthropic() response = client.messages.create( model="claude-sonnet-4-6", max_tokens=1024, messages=[{ "role": "user", "content": "Draft a launch email in our brand voice." }] ) print(response.content[0].text) # → ships a polished email, # ready to send.
Whatever you'd normally search for, paste, draft, or write — give it to Sonnet first. Most people never go back.
Most AI comparisons miss the point: speed, cost, and "good enough" matter more than peak intelligence for everyday work. Here's the honest picture.
| Haiku 4.5 | Sonnet 4.6 | Opus 4.7 | ChatGPT (GPT default) | |
|---|---|---|---|---|
| Best for | Speed & volume | Most everyday tasks | Hardest problems | General use |
| Available on free tier | Limited | ✓ Yes | Pro & up | ✓ Yes |
| Reasoning quality | ★★★ | ★★★★ | ★★★★★ | ★★★★ |
| Coding ability | ★★★ | ★★★★★ | ★★★★★ | ★★★★ |
| Speed | Ultra fast | Fast | Thoughtful | Fast |
| Context window | 200K | 200K | 200K | ~128K |
| Honest about limits | ✓ | ✓ Best | ✓ | Mixed |
| Pro plan price | Pro $20/mo | Free or $20/mo | $20/mo | $20/mo |
Pick any of these and open Claude. Most take under 30 seconds. None of them require an upgrade.
Polite no, hard ask, awkward update — Sonnet drafts it in your voice and tone. Just paste the situation.
Try this →Paste your error trace and the relevant code. Sonnet diagnoses, explains, and ships a fix.
Try this →Drop the file in. Get a tight summary, key claims, and the questions worth following up on.
Try this →Tax code, a research paper, a DevOps concept — Sonnet adapts to your level and explains clearly.
Try this →Blog post, memo, essay, README. Brief Sonnet on what you want; it ships a usable v1.
Try this →Upload a CSV. Ask for trends, anomalies, charts, or a written narrative of what the data says.
Try this →Negotiation, feedback, performance review — Sonnet role-plays the other side so you can rehearse.
Try this →Not just word-for-word — Sonnet preserves register, tone, and cultural context across 100+ languages.
Try this →Sonnet 4.6 is on every plan, including the free one. Most people start here and stay for months before they think about upgrading.
The questions people ask most often before they hit "Try Free."
Yes — Sonnet 4.6 is the default model on Claude.ai's free tier. You get daily message limits, file uploads, vision, and the full intelligence of Sonnet 4.6, with no credit card and no trial timer. Most casual users never hit the daily cap. Try it now →
Opus 4.7 is Anthropic's flagship — slightly smarter on the very hardest reasoning, but slower and only available on Pro and above. Sonnet 4.6 is faster, available free, and handles the vast majority of real-world tasks at the same quality level. Start with Sonnet; upgrade only if you hit something it can't crack.
Coding, writing, document analysis, vision/image reading, translation, research synthesis, brainstorming, tutoring, agentic workflows with tool use, and more. Browse capabilities →
Fast. Most prompts return in a couple of seconds. Streaming responses start almost instantly so you can read as it writes. It's the speed point most people use AI at every day.
claude-sonnet-4-6. It's a drop-in replacement — pass it anywhere you'd previously call claude-sonnet-4-5 or older versions. No SDK upgrade required.
Yes — and it's the recommended default model for Claude Code. Run claude in any repo and you're already using Sonnet 4.6.
200,000 tokens — about 500 pages of text. You can drop in entire codebases, books, contracts, or research corpora and have Sonnet reason across all of it in a single conversation.
Anthropic publishes its data handling policies in detail. By default, Pro and Max conversations are not used to train models. Enterprise/Team plans support zero data retention. Full details at anthropic.com/privacy.
Only if you're hitting the free daily limits, want access to Opus 4.7 for harder tasks, or use Projects and persistent memory. The honest answer: most people don't need Pro. Try free first and upgrade only if you feel the wall.
Yes. Pro and Max are month-to-month, cancel anytime, no questions asked. The free tier is permanent.
Open Claude in your browser, ask Sonnet 4.6 the thing on your mind, and decide for yourself. It takes thirty seconds.
Free forever · No credit card · Works in any browser · 100+ languages