A frontier AI built to be helpful, harmless, and honest. Anthropic's Claude reasons across long contexts, runs agents that get work done, and writes code your team will trust on Friday afternoon.
vitest case covering both the burst-limit and the cold-start path. Patching auth/handler.ts…
A different kind of AI
Claude takes the long view: longer context windows, deeper chains of reasoning, a temperament that admits when it doesn't know.
Claude reads a million tokens — a quarter-million lines of code, a year of customer transcripts — and answers about it the way you would, having actually read it.
Read the technical report →Open a browser, read the codebase, write a PR, run the tests. Claude composes tools the same way an engineer composes commits — one verified step at a time.
Watch an agent run →Claude is built on Anthropic's safety research. Constitutional AI, red-team rigor, and a model that prefers to say "I don't know" over making something up.
Our approach to safety →Claude Code
Claude Code lives in your terminal, your editor, and your CI. It plans the change, makes the edit, runs the tests, and explains the diff in plain English.
12export async function handleAuth(req: Request) { 13 // rate-limit must fail-closed before session write 14 const ok = await checkRate(req.ip); 15 if (!ok) return deny("too_many_requests"); 16 17 const user = await verify(req); 18 return grant(user); 19}
Which problem are you up against?
Pick the model that fits the task — from quick replies to deep research.
Fast, frugal, and fluent. The model that turns a Friday afternoon into shipped tickets.
The everyday workhorse — costs like Haiku-plus, thinks like Opus-minus. Where most teams should start.
The deepest reasoning we ship. Reach for it when a million tokens of context need to come out as one coherent answer.
Connectors
Read repos, open PRs.
Draft and synthesize.
Daily standup helper.
Triage and plan sprints.
Reason over your files.
Resolve tier-1 tickets.
Constitutional AI isn't a marketing line at Anthropic. It's a research program that ships with every model we release — interpretable, steerable, accountable.
We're trying to build AI that's honest about what it knows — and what it doesn't.
— from the Anthropic mission
Pricing
Start free, scale on usage, and never get surprised at the end of the month.
Try Claude with daily limits. Great for personal projects and exploration.
For practitioners. Higher limits, longer context, every model in the family.
For teams that need shared spaces, controls, and centralized billing.
DESIGN SYSTEM
Anthropic's web language anchors on a tinted cream canvas, a single warm coral CTA, and dark navy product surfaces — a deliberate counter-position to the cool grays of the rest of the AI category. Every token below is sourced from the brand's DESIGN.md.
Brand & Accent — the coral & teal trio
Surface — cream side
Surface — dark navy side
Text
Copernicus serif (subbed Cormorant Garamond) for display · StyreneB (subbed Inter) for body · JetBrains Mono for code
Buttons — 8r · 40h · 12/20 padding
Inputs — 8r · hairline · 40h · 10/14 padding
Tags & badges
Cards — feature (cream) · dark navy · coral callout
Cream surface (#efe9de) on cream canvas — color contrast carries the elevation. 12px radius, 32 padding, no shadow.
Dark navy (#181715) carries product chrome — code, terminals, agent flow. The brand shows the actual product instead of marketing renders.
Coral surface is generous, never miniature. CTA inside flips to cream-button. The coral IS the voltage.
Get an API key in 60 seconds, ship to production by Friday.