Independent guide to Anthropic’s Claude

Claude AI Chat: Use Anthropic’s Claude Free or Paid (2026)

Claude chat, the official Claude AI chatbot from Anthropic, runs free at claude.ai. The free plan gives you daily message limits on the default Claude Sonnet 4.6 model. Paid plans (Pro from $20/month; Max for heavier use) add higher limits, longer context, and the flagship Claude Opus 4.7. There are also Claude AI mobile apps for iOS and Android, desktop apps for Mac and Windows, and a Claude API for developers. This page is the independent guide. We’ll tell you what’s actually free, where to chat with Claude AI online, which Claude model to pick, and how Claude chat compares to ChatGPT — every claim verified against Anthropic’s primary sources.

Open Claude AI chat at claude.ai → See pricing & plans Pick a Claude model
464 articles· 40 models tracked· 16 topic clusters· Last updated

Edited by the c-ai.chat editorial team · How we verify

Free tier

Is Claude AI chat free?

Yes. The Claude AI Free plan is $0/month and gives you direct access to claude.ai with daily message limits on Claude Sonnet 4.6, Anthropic’s default chat model in 2026. You’ll see a usage banner when you’re approaching the limit, after which Claude either pauses or downgrades you to a lighter model until the limit resets.

If you bump into the free limit regularly, the paid tiers are:

For the full plan-by-plan breakdown of what each tier includes, see our Claude pricing guide and the side-by-side plans comparison.

Getting started

How to chat with Claude AI online

The fastest way to chat with Claude AI online is the official web app at claude.ai: no install, free tier available, signs you in with Google, email, or SSO. Some people search for “Claude chat” or “claude.ai/chat”; they all land on the same place: claude.ai. From there, Anthropic offers the same Claude chat experience across every surface:

  • Web: claude.ai. Works in any modern browser, the most feature-complete surface.
  • Mobile apps: official iOS and Android apps with voice mode, photo uploads, and shared projects.
  • Desktop apps: native macOS and Windows apps; same chat, plus system-wide keyboard shortcuts.
  • Claude Code: Anthropic’s CLI for engineers. See how to install Claude Code.
  • Claude API: for developers building Claude into their own products. See how to use the Claude API.

You don’t need a paid plan to try it: sign in at claude.ai, type a prompt, and you’re in. If you want the deeper walkthrough of every Claude AI chat capability (Projects, Artifacts, Connectors, voice, vision, extended thinking), see our Claude features guide.

Background

What is Claude AI?

Claude AI is the AI chatbot built by Anthropic, an AI safety company founded in 2021 by Dario and Daniela Amodei and other former OpenAI researchers. Anthropic is headquartered in San Francisco and backed by Amazon and Google. The product is named “Claude”; the company is “Anthropic”; the website you chat at is claude.ai; and the developer platform is at platform.claude.com.

Claude is well-known for long-context work (Opus 4.7 handles 1M tokens), strong coding performance, careful refusals, and the Constitutional AI safety approach. For the full background (origins, training, safety, business model), read our What is Claude AI primer (30 articles).

Which Claude AI model should you use?

Three current models, three different jobs. Prices are per million tokens via the API.

Flagship

Claude Opus 4.7

Hardest reasoning, coding, vision, agentic work.

Input
$5/Mtok
Output
$25/Mtok
Context
1M tokens
Read the Opus 4.7 guide → Recommended default

Claude Sonnet 4.6

Strong balance of quality, speed, and cost.

Input
$3/Mtok
Output
$15/Mtok
Context
1M tokens
Read the Sonnet 4.6 guide → Fast / low cost

Claude Haiku 4.5

High-volume workloads, low-latency tasks, automation.

Input
$1/Mtok
Output
$5/Mtok
Context
200K tokens
Read the Haiku 4.5 guide →

Start with Sonnet 4.6 unless you have a specific reason. Move to Opus 4.7 for harder reasoning, coding, vision, or creative work. Use Haiku 4.5 when speed and price matter most. For migration notes and full version history, see our complete Claude models guide.

Comparison

Claude AI chat vs ChatGPT

Claude and ChatGPT are separate AI chatbots from separate companies. Claude is built by Anthropic, ChatGPT by OpenAI. In 2026 the two are very close on day-to-day chat quality; the real differences show up in specific tasks:

  • Coding: Claude Opus 4.7 leads on long agentic coding work and large codebase edits. See Claude vs ChatGPT for coding.
  • Long documents: Claude’s 1M-token context (on Opus 4.7 and Sonnet 4.6) gives it room ChatGPT doesn’t always match.
  • Writing & tone: Claude tends to be more direct; ChatGPT tends to be more conversational and emoji-friendly. Personal preference.
  • Free tier: both have a free tier; usage limits vary and change frequently.

Read the full side-by-side at Claude vs ChatGPT, 2026 comparison. Also see Claude Pro vs ChatGPT Plus (subscription comparison) and our complete Claude comparisons hub.

Start here

Pick the path that matches what you’re trying to do.

New to Claude

What is Claude AI, and is it for me?

Plain-English overview of Claude AI, who makes it, how it compares to ChatGPT and Gemini, and which plan fits your work.

Start the primer → Plans & pricing

Free, Pro, Max, Team, Enterprise compared

What every Claude plan includes, what the limits are, and which one fits how you actually use Claude AI.

Compare plans → Building with the API

Build on Claude: pricing, SDKs, errors, best practice

Authentication, rate limits, model choice, prompt caching, batch, citations, errors. The reference for production engineers.

Open the API guide → Comparing options

Claude AI vs ChatGPT, Gemini, Grok and more

Head-to-head Claude comparisons across writing, coding, vision, file handling, team controls, and price. Independent and dated.

Browse comparisons →

Latest verifications

Most-recently re-verified pages from across the site.

News & Updates

What’s New in Claude, Monthly Digest

Every Anthropic product, model, and policy change in the last month, in one place.

 General

Claude AI 2026, Year in Review

Models shipped, plans changed, features launched, and what it all means for working professionals.

 General

Claude Blog: Anthropic’s Updates

Tracking every public Anthropic announcement with independent context and analysis.

 Features

Claude Extended Thinking Mode

When extended thinking helps, when it hurts, and how to use it for hard reasoning tasks.

 Features

Claude Imagine: UI & Mockup Generation

Generate landing pages, slide decks, wireframes, and product UI from prompts.

 Comparisons

Claude vs Llama, Side by Side

Open-source Llama 3 against Claude AI on coding, reasoning, vision, and total cost of ownership.

Browse by topic

464 Claude AI articles across 16 topic clusters. Every page dated and source-cited.

Claude Code

CLI, MCP, hooks, slash commands, plugins, IDE integration.

84 articles

Features & Capabilities

Artifacts, projects, vision, voice, citations, connectors, skills.

54 articles

Claude Models

Opus, Sonnet, Haiku across versions 3, 3.5, 3.7, 4, 4.5, 4.6, 4.7.

40 articles

Anthropic

Funding, leadership, products, partnerships, policy positions.

38 articles

General & Branded

Company news, founders, controversy, careers, partnerships, culture.

35 articles

Pricing & Plans

Free, Pro, Max, Team, Enterprise, and per-token API rates.

32 articles

API & Developers

Auth, models, errors, SDKs, batch, prompt caching, citations, tools.

30 articles

What is Claude AI?

Background, history, training, safety, mental model.

30 articles

Tutorials

Step-by-step Claude tutorials for prompts, projects, agents, the API.

29 articles

Comparisons

Claude vs ChatGPT, Gemini, Grok, DeepSeek, Mistral, Llama, Qwen.

27 articles

Login & Access

Sign in, recover access, verify email, sign-in issues.

18 articles

Skills, Agents & Plugins

Claude Skills, agents, and plugins explained with examples.

18 articles

Status & Outages

Live status, outage history, troubleshooting common errors.

15 articles

Cowork

Anthropic’s collaboration tool for teams: setup, use cases, plans.

12 articles

News & Updates

Latest model releases, product launches, partnerships, policy moves.

10 articles

About c-ai.chat

Who we are, what we cover, how we verify, and how to reach us.

Editorial

What’s new in 2026

The Anthropic announcements we’ve covered most recently.

  • Claude Opus 4.7: current flagship, 1M-token context, $5 input / $25 output per million tokens.
  • Claude Design: generates landing pages, decks, wireframes, and UI from prompts (paid plans).
  • Office add-ins GA: Excel, PowerPoint, and Word integrations reached general availability.
  • Claude blog tracker and News & Updates index for everything Anthropic ships next.

How we verify

Every page on c-ai.chat follows the same editorial process:

  • Primary sources only. We cite Anthropic’s official pages, documentation, model cards, and announcements, and link directly so you can verify our claims yourself.
  • Dated verification. Every page shows a “Last updated” date that reflects when we last touched the content. Key reference pages (pricing, model guides, API docs) receive explicit re-verification against Anthropic’s primary sources on a recurring cycle.
  • No affiliate cloaking. We do not redirect through affiliate links. Where we link to Anthropic’s apps, we link directly. Where we monetise, it is via clearly-labelled display ads.
  • Independent of Anthropic. We are not an Anthropic subsidiary, partner, reseller, or community programme. Our coverage is editorial, not promotional.
  • Corrections welcome. Email [email protected]; every correction is dated and disclosed in the page footer.

For more on the team and editorial standards behind c-ai.chat, see our about-the-author page and our about page.

Frequently asked questions

Is c-ai.chat the official Claude AI site?

No. c-ai.chat is an independent third-party guide and is not affiliated with Anthropic. The official Claude AI chat is claude.ai; the developer platform is platform.claude.com; the official documentation is at docs.claude.com.

Is Claude AI chat free to use?

Yes. The Claude AI Free plan is $0/month and includes web, mobile, and desktop access with daily message limits on Claude Sonnet 4.6. See our pricing guide for plan-by-plan limits and the full free vs paid comparison.

Can I chat with Claude AI online without an account?

No. Anthropic requires sign-in to use Claude AI at claude.ai. You can sign in with Google, email/password, or your work SSO. Account creation is free; the free plan starts immediately.

Which Claude AI model should I use?

Use Claude Sonnet 4.6 for most chat work. Use Claude Opus 4.7 for the hardest reasoning, coding, vision, and creative tasks. Use Claude Haiku 4.5 for high-volume or low-latency work. See our full Claude models guide for the side-by-side and migration notes.

How is Claude AI different from ChatGPT?

Claude AI and ChatGPT are separate products from different companies, Anthropic and OpenAI. For our side-by-side analysis see Claude vs ChatGPT, Claude vs ChatGPT for coding, and the full comparisons hub.

Where can I download the official Claude AI app?

The official consumer product is at claude.ai. Official mobile apps are on the App Store and Google Play; desktop apps are available for macOS and Windows. Developer access is via platform.claude.com. For setup guidance see our Claude AI download guide.

Is Claude AI safe to use for work?

Anthropic positions Claude AI as one of the more safety-focused chatbots; the Team and Enterprise plans add admin controls, audit logging, and SSO. For data-handling specifics see our Claude AI privacy guide and Anthropic’s official trust and security documentation.

Last updated: 2026-05-15. Independent third-party guide to Claude AI. Not affiliated with Anthropic. For the official Claude AI chat, visit claude.ai.