Chat with Claude AI for free — no login or sign-up required. Advanced reasoning, long-document analysis, and expert-level coding. Access Opus 4, Sonnet 4, and Haiku 3.5.
Claude is an AI assistant created by Anthropic, designed to be helpful, harmless, and honest. Claude excels at thoughtful analysis, creative writing, coding, and nuanced conversation across a wide range of topics.
Trained using Constitutional AI techniques, Claude is particularly strong at following instructions carefully and providing balanced, well-reasoned responses. It consistently delivers top-tier performance in writing, summarization, coding, and complex reasoning tasks.
Opus 4 for maximum intelligence, Sonnet 4 for everyday work, Haiku 3.5 for instant speed — pick the right Claude model.
Yes — you can chat with Claude AI completely free on chat-gpt.org. No login or sign-up required.
Claude is designed to be especially helpful, harmless, and honest, with top-tier reasoning, writing, and large context window capabilities.
Yes, Claude has one of the largest context windows available and excels at analyzing lengthy texts, research papers, and documents.
Yes — Claude is excellent at writing, reviewing, debugging, and explaining code in many programming languages.
Claude was created by Anthropic, an AI safety company focused on building reliable, helpful AI systems.
Yes, Claude can communicate in many languages, with strongest performance in English.
See how the top AI models stack up — detailed side-by-side comparisons across reasoning, coding, speed, and all key capabilities.