Claude Opus 4.5

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About Claude Opus 4.5

Claude Opus 4.5 is Anthropic’s Opus model (anthropic/claude-opus-4.5) for high-quality assistance.

Use for writing, analysis, coding, and long documents. Pre-selected on this page.

Credits per message; web search available when enabled.

How to Use Claude Opus 4.5

Start a conversation

Type your question or prompt in the input box below. Claude Opus 4.5 will respond in real time.

Use attachments

You can attach images or files for multimodal input. Claude Opus 4.5 supports text and image understanding.

Enable web search

Turn on web search for up-to-date information. Claude Opus 4.5 can fetch and cite current web content.

Frequently Asked Questions

What is Claude Opus 4.5?

Anthropic’s Opus-tier Claude for demanding chat and content tasks.

How to use?

claude-opus-4-5 is pre-selected; sign in to chat.

Free?

Starter credits; usage is credit-based.

Web search?

Enable for up-to-date answers.

Claude Opus 4.5 — AI Chat | Anthropic Online