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Introducing Claude Opus 4.8

May 28, 2026 14 min
claude opus 4.8ai codingllm evaluation
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Summary

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This video reviews the newly released Claude Opus 4.8 AI model, highlighting its improved coding, reasoning, and agency capabilities compared to its predecessor.

The video provides a detailed hands-on review of Claude Opus 4.8, the latest AI model update from Anthropic. The presenter demonstrates the model's enhanced capabilities in generating functional HTML applications, including a city-builder simulation, an interactive AI history timeline, a 3D solar system, and a marketing dashboard. A significant focus is placed on the new, easily accessible 'effort' control, which allows users to dictate the model's reasoning intensity directly within the Claude web interface. The video contrasts Opus 4.8's performance against its predecessor, 4.7, showing it is more capable, honest, and aligned, with significantly reduced hallucination rates. The review concludes by noting the model is available to paid Claude Pro users, while emphasizing that although it is more credit-intensive than other models, it represents the most advanced AI available for complex tasks.

Verdict

Claude Opus 4.8
ai model · $5 / $25 per M tokens

Opus 4.8 is a clear improvement over 4.7, offering better reasoning, reduced hallucinations, and more precise adherence to complex prompts.

Buy

Pros

  • ✓ Superior performance in complex coding tasks 2:13
  • ✓ Greatly reduced hallucination and increased honesty 3:23
  • ✓ Easily adjustable reasoning intensity via 'effort' control 3:41
  • ✓ Highly effective at creating standalone, interactive HTML artifacts 10:38

Cons

  • ✗ Significant consumption of usage credits 0:35

Specs

context window 1 million tokens (on supported models)

Compared to

  • Claude 4.7

    Opus 4.8 is demonstrably smarter, more honest, and better at following complex instructions.

Best for

  • developers
  • data analysts
  • creative professionals

Not for

  • casual users on limited credit budgets

Key Points

  • 0:12 Introduction of the new user-accessible 'effort' control in the web interface.
  • 1:47 Review of benchmark improvements across coding, reasoning, and agency skills vs. Opus 4.7.
  • 6:47 Demonstration: Creating an interactive 'city builder' game in HTML.
  • 8:45 Demonstration: Creating an interactive AI history timeline.
  • 10:33 Demonstration: Building an interactive 3D solar system using Three.js.
  • Announcement and overview of Claude Opus 4.8, now the most capable model available.
  • Demonstration: Creating a marketing data dashboard from sample CSV data.
  • Showcase of Claude Code on the desktop app with increased context window.

Worth watching if: You are a heavy user of Anthropic's Claude AI for coding or creative projects and want to understand how the new Opus 4.8 model differs from 4.7 and how the new 'effort' controls can improve your results.

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