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
Latest on Claude
Oct 9Agents · ExplainerWhat is MCP? The Model Context Protocol explained (2026 edition)
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Timeline
MAR 2023First release