#OpenAI の記事

OpenAI vs Claude Opus | GPT-5.5 and 4.8 Performance & Pricing Comparison

A comparison of OpenAI GPT-5.5 and Claude Opus 4.8 across pricing, benchmarks, agent capabilities, and context length. Based on official information as of June 2026, this guide covers the latest flagship showdown and how to choose between them by use case.

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.

Using OpenAI Models in Claude Desktop | MCP Integration Setup

Using OpenAI with Claude Code | Codex Integration and Model Switching

Answers to the 'openai claude code' search query, all in one place. Claude Code is made by Anthropic, not OpenAI, but ways to combine the two have expanded significantly in 2026. We explain three routes — OpenAI's official Codex Plugin for Claude Code, running Claude Code on OpenAI models via claude-code-proxy, and the OpenAI SDK compatibility layer — with setup commands and environment variables drawn from primary sources.

Claude 3.7 Sonnet Is Made by Anthropic | Differences from OpenAI o1

Answers the search query 'openai claude 3.7' in plain terms. Claude 3.7 Sonnet is made by Anthropic, not OpenAI — it's the world's first hybrid reasoning model that outperformed OpenAI o1 and o3-mini on SWE-bench. This article covers its specs, pricing, where to use it, and the fact that it has since been replaced by successor models, all backed by primary sources.

OpenAI and Claude Mythos | Competitor Daybreak and Performance Comparison

Clarifying the search query 'openai claude mythos.' OpenAI is not a Project Glasswing partner but a competitor that announced Daybreak as a rival model. We explain the UK AISI benchmark comparison between GPT-5.5 and Claude Mythos, the Erdős problem, and the unofficial OpenMythos project — all backed by primary sources.

What Is Claude Bot | OpenClaw and the Relationship Between OpenAI and Anthropic