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Claude Opus 4.8

Anthropic's flagship model — stronger coding, agents, and honesty

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paid$5/M input tokens, $25/M output tokens (standard). $10/M input, $50/M output (fast mode). Same pricing as Opus 4.7.View full pricing →

Visit Claude Opus 4.8

https://www.anthropic.com/news/claude-opus-4-8

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About Claude Opus 4.8

Anthropic's most capable model as of May 2026. Claude Opus 4.8 delivers improvements in coding (Terminal-Bench 2.1), agentic tasks, computer use (84% on Online-Mind2Web), and long-running professional workflows. Notable for 4× lower false-confidence rate vs Opus 4.7, new dynamic workflows support in Claude Code, and effort control for tuning quality vs. speed. Priced identically to Opus 4.7: $5/M input, $25/M output.

Key Features

✓84% on Online-Mind2Web (computer use / browser agent benchmark)
✓4× less likely than Opus 4.7 to report unsubstantiated progress on code
✓Dynamic workflows: hundreds of parallel subagents in a single Claude Code session
✓Effort control: low / high / extra / max levels for quality-vs-speed tradeoff
✓System entries accepted mid-task via Messages API without breaking prompt cache
✓Legal Agent Benchmark: first model to break 10% on all-pass standard
✓200K token context window
✓Tool use, vision, and extended thinking

Claude Opus 4.8 Pros & Cons

✅ Pros

  • +Best-in-class computer use: 84% on Online-Mind2Web, beating GPT-5.5 and Opus 4.7
  • +Honesty improvements: 4× less likely to claim false progress on code tasks
  • +Dynamic workflows in Claude Code let you scale to hundreds of parallel subagents
  • +Effort control lets you dial quality vs. token spend for each request
  • +Unchanged pricing vs Opus 4.7 — same cost, meaningfully better performance
  • +Alignment improvements: lower deception and misuse rates than any prior Opus
  • +Token efficiency: 61% cheaper than Opus 4.7 for multimodal retrieval tasks (per Databricks)

⚠️ Cons

  • −Defaults to high-effort mode — higher token consumption than Opus 4.7 by default
  • −Frontier pricing ($5/$25 per million tokens) makes it expensive at scale
  • −Dynamic workflows only available on Claude Code Enterprise, Team, and Max plans
  • −Not a quantum leap over Opus 4.7 — Anthropic describes it as 'modest but tangible'

Who Is Claude Opus 4.8 Best For?

👤Agentic coding workflows and codebase-scale migrations
👤Browser automation and computer use pipelines
👤Long-running professional tasks: legal, finance, research
👤Developers who need the highest reasoning quality with effort-level control

Tags

anthropicclaudellmapicodingai agentsagenticfrontier modelclaude opus
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