Topic · Product
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.
Fact file
First releaseMarch 14, 2023 (Claude, Claude Instant)
Context window / max output1M 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 recommendationStart with Opus 5.5; use Fable 5.1 for the most demanding reasoning and long-horizon agentic work
DeveloperAnthropic PBC
Start here
Latest on Claude
Oct 9Models · AnalysisWhat the Claude Opus 5.5 system card actually saysOct 9Models · BenchmarksLong-context recall: what independent benchmarks say "1 million tokens" really buys youOct 9Apps · CompareChatGPT vs Claude for coding and writing: plans, models and limits comparedOct 9Apps · ExplainerThe Claude app, explained: plans, models, Cowork and how usage limits workOct 9Models · ExplainerReasoning models explained: thinking tokens, what they cost, and when to use themOct 9Models · GuideWhich Claude model should you use? The current lineup and official pricesOct 9Developer tools · GuideBuild your first agent with the Claude Agent SDK (TypeScript, October 2026)Oct 9Business · ExplainerAnthropic explained: history, products and how it makes moneyOct 9Research · ExplainerContext windows vs memory vs RAG: what each one actually doesOct 9Developer tools · GuideBuild a local MCP server with the official TypeScript SDK (v2): one tool, one resource, one prompt
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Timeline
MAR 2023First release