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Claude is Anthropic's family of AI models, known for careful reasoning, natural writing and strong coding. ai-chat.pro is an independent workspace powered by the full lineup through Anthropic's official API - Opus for the hardest problems, Sonnet for coding and everyday depth, Haiku for speed - under one ai-chat.pro subscription instead of several separate ones.
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Opus is the strongest for deep reasoning and hard problems, Sonnet is the best all-rounder for coding and everyday work, and Haiku is the fastest for quick questions. You can switch models at any point in a conversation.
Yes - Claude models are widely regarded as among the best for natural prose, careful editing and code generation. Sonnet 5.5 in particular is a popular choice for programming work.
The trial is just $1. Paid plans start at $29.99 per month and include the Claude lineup along with OpenAI's GPT models.