#Claude Opus 4.8 の記事

What Is Claude xhigh | How to Use the 5-Level Effort System

A complete guide to Claude's xhigh effort level — the fourth tier sitting between high and max. Covers the 5-level effort comparison, how to configure it in the API and Claude Code, and token consumption estimates from an implementation perspective.

OpenAI and Claude News | Valuation, IPO, and the New Model Race

Everything you need to know when searching 'openai claude news.' OpenAI and Claude (Anthropic) are separate, competing companies, and the real story is the rivalry between them. We break down Anthropic's record $965B valuation surpassing OpenAI, the Claude Opus 4.8 vs. GPT-5.5 model battle, next-gen Mythos and Daybreak, and the IPO race heating up in the second half of 2026 — all from primary sources.

Anthropic Breaking News | Opus 4.8 and Code v2.1.154 Released on the Same Day