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Claude Fable 5 is Anthropic's most capable widely released model, built for demanding reasoning, long-running agent workflows, complex coding, and advanced knowledge work.

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Claude Haiku 4.5 is Anthropic's fastest Claude model, optimized for low latency and high throughput while delivering strong performance in everyday chat, coding, and document analysis.

Claude Opus 4.5 is a frontier reasoning model designed for the most demanding tasks, delivering exceptional performance in complex analysis, coding, research, and long-context reasoning.

Claude Opus 4.6 is a frontier reasoning model designed for the most demanding tasks, delivering exceptional performance in complex analysis, coding, research, and long-context reasoning.

Claude Opus 4.7 builds on the Opus series with stronger reasoning, improved coding performance, and more reliable tool use for advanced workflows.

Claude Opus 4.8 is Anthropic's most capable Opus model, offering state-of-the-art performance in reasoning, coding, planning, and long-context tasks.

Claude Opus 5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, delivering state-of-the-art performance across complex professional workflows.

Claude Opus 5.5 is Anthropic's frontier workhorse model for long-running agentic coding and knowledge work, with adaptive thinking and a 1M context window.

Claude Sonnet 4.5 balances intelligence, speed, and cost, making it an excellent choice for coding, writing, analysis, and agentic workflows.

Claude Sonnet 4.6 balances intelligence, speed, and cost, making it an excellent choice for coding, writing, analysis, and agent workflows.

Claude Sonnet 5 is Anthropic's most agentic Sonnet model yet, delivering powerful reasoning, coding, and tool use while bringing Opus-class capabilities at Sonnet's speed and price.