Claude 4.7 Opus · Now generally available

# Meet your thinking partner.

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.

Try Claude free Talk to sales
YZ
Refactor this auth handler so the rate-limit branch fails closed, and add a unit test.
I'll move the limit check before the cookie write so a deny short-circuits the session, and add a `vitest` case covering both the burst-limit and the cold-start path. Patching auth/handler.ts…

A different kind of AI

## Built to think with you, not for you.

Claude takes the long view: longer context windows, deeper chains of reasoning, a temperament that admits when it doesn't know.

### Long-context reasoning

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 →

### Agentic work, finished

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 →

### Helpful, harmless, honest

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

## A coworker who reads the whole repo.

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.

auth/handler.ts

    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}

$pnpm vitest auth
✓auth/handler.test.ts (4 passed) · 312ms
✓covers cold-start + burst-limit paths
01
Plan Read repository, identify the failing-open branch in auth/handler.ts. Draft three-step edit.
02
Patch Move rate-limit before session grant. Add vitest covering burst & cold-start.
03
Verify Run the suite, open PR with a plain-English diff summary.
Run finished · 12.4s · 4 tests passing

Which problem are you up against?

## One family. Three temperaments.

Pick the model that fits the task — from quick replies to deep research.

Haiku

### Sprint

Fast, frugal, and fluent. The model that turns a Friday afternoon into shipped tickets.

Latency~0.4s
Context 200K tok
Best for UI, search, triage
Read benchmarks
Sonnet · Default

### Marathon

The everyday workhorse — costs like Haiku-plus, thinks like Opus-minus. Where most teams should start.

Latency~1.1s
Context 500K tok
Best for Code, RAG, agents
Read benchmarks
Opus

### Symphony

The deepest reasoning we ship. Reach for it when a million tokens of context need to come out as one coherent answer.

Latency~2.6s
Context 1M tok
Best for Research, planning
Read benchmarks

Connectors

## Plug Claude into the tools you already use.

G

#### GitHub

Read repos, open PRs.

N

#### Notion

Draft and synthesize.

S

#### Slack

Daily standup helper.

L

#### Linear

Triage and plan sprints.

D

#### Drive

Reason over your files.

Z

#### Zendesk

Resolve tier-1 tickets.

## Trust isn't a feature. It's the product.

Constitutional AI isn't a marketing line at Anthropic. It's a research program that ships with every model we release — interpretable, steerable, accountable.

Read the constitution Open our safety paper

We're trying to build AI that's honest about what it knows — and what it doesn't.

— from the Anthropic mission

Pricing

## Pay for thinking, not seats.

Start free, scale on usage, and never get surprised at the end of the month.

### Free

$0/mo

Try Claude with daily limits. Great for personal projects and exploration.

- Claude Haiku, unlimited drafts
- Claude Sonnet, daily quota
- 200K context window
- Web chat only

Start free
Most chosen

### Pro

$20/mo

For practitioners. Higher limits, longer context, every model in the family.

- Sonnet & Opus, generous limits
- Projects + custom instructions
- 500K context window
- Web, desktop, mobile

Upgrade to Pro

### Team

$30/seat/mo

For teams that need shared spaces, controls, and centralized billing.

- Everything in Pro
- Team workspaces + roles
- Admin console + audit log
- SAML SSO, SOC 2 II

Contact sales

DESIGN SYSTEM

## Cream, coral, navy. One trinity.

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.

### Color

Brand & Accent — the coral & teal trio

primary
#cc785c
primary-active
#a9583e
primary-disabled
#e6dfd8
accent-teal
#5db8a6
accent-amber
#e8a55a

Surface — cream side

canvas
#faf9f5
surface-soft
#f5f0e8
surface-card
#efe9de
cream-strong
#e8e0d2
hairline
#e6dfd8

Surface — dark navy side

surface-dark
#181715
dark-soft
#1f1e1b
dark-elevated
#252320

Text

ink
#141413
body-strong
#252523
body
#3d3d3a
muted
#6c6a64
muted-soft
#8e8b82

### Typography

Copernicus serif (subbed Cormorant Garamond) for display · StyreneB (subbed Inter) for body · JetBrains Mono for code

display-xl 64 · w500 · −1.5 · 1.05 · serif
Meet your thinking partner.
display-lg 48 · w500 · −1.0 · 1.10 · serif
A coworker who reads the repo.
display-md 36 · w500 · −0.5 · 1.15 · serif
One family. Three temperaments.
display-sm 28 · w500 · −0.3 · 1.20 · serif
Pricing tier name · callout headline
title-lg 22 · w500 · 0 · 1.3 · sans
Plan size label · pricing tier
title-md 18 · w500 · 0 · 1.4 · sans
Feature card title · intro paragraph
body-md 16 · w400 · 0 · 1.55 · sans
Default running text. Editorial pacing, generous leading — Claude reads more like a long-form column than a SaaS landing page.
caption-upper 12 · w500 · +1.5 · UPPER
SECTION EYEBROW · NEW · BETA
code 14 · w400 · 0 · 1.6 · mono
const ok = await checkRate(req.ip);
button 14 · w500 · 0 · 1.0 · sans
Try Claude · Talk to sales

### Radius

xs 4
sm 6
md 8 · buttons + inputs
lg 12 · cards
xl 16 · hero card
pill∞ · badges
full 50% · icons

### Components

Buttons — 8r · 40h · 12/20 padding

Try Claude Pressed Talk to sales Secondary on dark Disabled

Inputs — 8r · hairline · 40h · 10/14 padding

text-input
text-input · focused (coral ring)

Tags & badges

badge-pill NEW BETA Spike-mark badge

Cards — feature (cream) · dark navy · coral callout

#### feature-card

Cream surface (#efe9de) on cream canvas — color contrast carries the elevation. 12px radius, 32 padding, no shadow.

#### product-mockup-card

Dark navy (#181715) carries product chrome — code, terminals, agent flow. The brand shows the actual product instead of marketing renders.

#### callout-card-coral

Coral surface is generous, never miniature. CTA inside flips to cream-button. The coral IS the voltage.

## Build with Claude today.

Get an API key in 60 seconds, ship to production by Friday.

Get an API key Read the docs

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View DESIGN.md ↗