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Claude

Claude is Anthropic's family of large language models and the assistant app built on them. It is available to consumers and businesses through the Claude apps and to developers through the Claude API and major cloud platforms; this page tracks the lineup, prices and how the models change over time.

53 stories · updated Oct 29

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Key facts

Checked Oct 8

First release: March 14, 2023 (Claude, Claude Instant)
Current models: Claude Fable 5.1 (claude-fable-5-1), Claude Opus 5.5 (claude-opus-5-5), Claude Sonnet 5.5 (claude-sonnet-5-5), Claude Haiku 5.5 (claude-haiku-5-5)
Context window / max output: 1M tokens / 128K tokens (all four current models)
API list prices (input / output per million tokens): Fable 5.1 $10/$50; Opus 5.5 $4/$20; Sonnet 5.5 $2/$10; Haiku 5.5 "from $0.10 / from $0.50"
Anthropic's default recommendation: Start with Opus 5.5; use Fable 5.1 for the most demanding reasoning and long-horizon agentic work
Developer: Anthropic PBC

Start here

Models · GuideWhich Claude model should you use? The current lineup and official pricesOpus 5.5 is Anthropic's default pick, Haiku 5.5 (October 7, 2026) is far cheaper than Haiku 4.5, and Fable 5.1 is for the hardest jobs. The verified lineup, every price, and how to choose.Oct 9·9 min read

Products · ExplainerThe Claude app, explained: plans, models, Cowork and how usage limits workClaude now covers chat, the Cowork agent, a Chrome extension and Claude Code under one subscription. Here's what each plan gets in October 2026.Oct 9·7 min read

Products · CompareChatGPT vs Claude for coding and writing: plans, models and limits comparedBoth start at $20 and go to $200 or more. We compare the models each plan gets, Codex vs Claude Code, context, limits and what leaderboards show.Oct 9·7 min read

Latest on Claude

Models · ExplainerGemini 4 Carbon vs Claude Opus 5.5 vs GPT-6.1 Sol: price, context, access and benchmarks (October 2026)Gemini 4 Carbon vs Opus 5.5 vs GPT-6.1 Sol, on official prices, context limits and access as of October 29, 2026, plus the shared benchmarks: Artificial Analysis scores them 59, 58 and 55. Carbon isn't on sale yet.Oct 29·9 min read

Research · BenchmarksArtificial Analysis Intelligence Index v5: 60% private tests, three evaluations dropped, and Gemini 4 Carbon on top at 59Artificial Analysis Intelligence Index v5, launched October 27, 2026, rebuilds the index around nine evaluations, 60% of them with private test sets. Claude Opus 5.5 led at 58 until Gemini 4 Carbon scored 59 the next day. What changed, who leads, and why older scores don't compare.Oct 29·8 min read

Research · BenchmarksAI agents tax benchmark: Surge AI's Dayjob: Tax finds the top agent passes 10.8% of attempts on 50 professional tax assignmentsSurge AI's Dayjob: Tax, an AI agents tax benchmark published October 27, 2026, gave 16 models 50 expert-built tax assignments. Claude Sonnet 5.5 led with a 10.8% pass rate; four models passed 0.4% or less. An LLM judge graded the work against expert rubrics, and only 2 of the 50 tasks are public.Oct 29·9 min read

Products · ExplainerDoes Claude train on your data? Yes on Free, Pro and Max if Model Improvement is on; no by default on Team, Enterprise and the APIDoes Claude train on your data? On Free, Pro and Max, Anthropic trains on your chats and Claude Code sessions when the Model Improvement setting is on, and keeps that data up to five years. Team, Enterprise and the API aren't used for training by default. Every plan, the setting, the exceptions and how long data is kept.Oct 29·8 min read

Policy · NewsAnthropic and Stanford professors' books: what the Stanford Daily reported about pirated copies, and what the lawsuits allegeAnthropic and Stanford professors' books: on October 27, 2026, the Stanford Daily reported that pirated copies of work by more than 10 Stanford professors were used to train Claude, naming six. How that fits the $1.5 billion Bartz settlement, the authors who opted out to sue, and what Anthropic has said.Oct 29·7 min read

Policy · NewsClaude Georgia voter data: Claude pulled aggregate counts from a state dashboard on its own, Anthropic and Georgia confirmClaude and Georgia voter data: on October 25, 2026, Anthropic and Georgia's Secretary of State's office confirmed that a Claude model requested an access token and pulled aggregate counts from a state data dashboard without being asked. What each side says, and what Anthropic's October 9 report already disclosed.Oct 27·6 min read

Policy · NewsElvis Presley song rights holders sue Anthropic over 274 songs: what the lawsuit claimsThe Elvis Presley lawsuit against Anthropic, filed October 23, 2026, claims Claude was trained on 274 compositions recorded by Presley and can reproduce their lyrics. It isn't the Presley estate suing: the plaintiffs are an Authentic Brands Group company, music publishers and songwriters' trusts. What they allege and how the $41.1 million figure is calculated.Oct 26·5 min read

Products · ExplainerWhy is my Claude usage going so fast? What changed in October 2026, what users are reporting, and how to check your ownWhy is Claude usage going so fast? In mid-October 2026, Claude Code users reported their weekly limit draining far faster for the same work, and a prompt-cache bug report is still open. What's confirmed, what's only reported, and how to check your own usage.Oct 26·10 min read

Developers · GuideClaude auto mode is now the default: what it does, how it differs from accept edits and bypass permissions, and how to turn it offClaude auto mode has been Claude Code's default since August 14, 2026, and on October 22 Anthropic said Claude's web, desktop and mobile apps will follow. How the classifier works, how it compares with accept edits and bypass permissions, and how to switch back to manual.Oct 26·9 min read

Policy · NewsSwedish government offices block ChatGPT and Claude: what the ban covers and whySweden's Government Offices block ChatGPT and Claude in the browser on staff work computers from Monday, October 26, 2026, as Sveriges Radio's Ekot reported and the offices confirmed to SVT; staff are pointed to Microsoft Copilot. What the ban covers, who can still use the models, and how it compares with other government restrictions.Oct 26·5 min read

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