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Claude Opus 4.8

Anthropic's best for coding and long-form writing

What it is

Anthropic's flagship model. It leads coding benchmarks (tops SWE-bench Pro) and writes the most natural prose around, holding very long manuscripts together thanks to up to 128k output tokens. Huge context, great at following complex instructions without hallucinating, with a "computer use" API that lets agents control real browsers and desktops. Available via API and on Claude.ai.

How to use it, step by step

  1. 1

    For everyday use go to claude.ai and create an account: chat with it like a colleague.

  2. 2

    Upload documents (PDFs, images, spreadsheets) by dragging them into the chat to have them analyzed.

  3. 3

    To integrate it into your software, create an API key at console.anthropic.com.

  4. 4

    Install the SDK: pip install anthropic, set ANTHROPIC_API_KEY and call client.messages.create() with the claude-opus-4-8 model.

  5. 5

    For huge documents or codebases use the large context: paste everything in a single request.

💡Practical tips

  • →Be explicit about the format you want (list, table, JSON): it follows instructions to the letter.
  • →For coding paste the full error and the file: it often finds the cause on the first try.
  • →For long-form writing it's the best: use the extended output for articles, reports, or whole chapters.

💰Pricing

Claude.ai free with limits; Pro at about $20/month. Via API you pay per token (input cheaper than output).

Go to Claude Opus 4.8

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