{"slug": "gpt-5-6-ultra-better-in-claude-code-than-in-codex", "title": "GPT 5.6 Ultra better in Claude Code than in Codex?", "summary": "Developer Theo reports that GPT-5.6 Ultra performs better in Anthropic's Claude Code than in OpenAI's Codex, expressing frustration over the discrepancy.", "body_md": "Theo - t3.gg\n@theo\ngpt-5.6-sol is meaningfully better in Claude Code than in Codex\n\nI'm going to crash out so badly over this\n2:58 AM · Jul 11, 2026\n162K\nViews", "url": "https://wpnews.pro/news/gpt-5-6-ultra-better-in-claude-code-than-in-codex", "canonical_source": "https://twitter.com/theo/status/2075776733626892542", "published_at": "2026-07-11 07:22:11+00:00", "updated_at": "2026-07-11 08:05:14.720726+00:00", "lang": "en", "topics": ["large-language-models", "ai-tools", "developer-tools"], "entities": ["Theo", "Anthropic", "OpenAI", "Claude Code", "Codex", "GPT-5.6 Ultra"], "alternates": {"html": "https://wpnews.pro/news/gpt-5-6-ultra-better-in-claude-code-than-in-codex", "markdown": "https://wpnews.pro/news/gpt-5-6-ultra-better-in-claude-code-than-in-codex.md", "text": "https://wpnews.pro/news/gpt-5-6-ultra-better-in-claude-code-than-in-codex.txt", "jsonld": "https://wpnews.pro/news/gpt-5-6-ultra-better-in-claude-code-than-in-codex.jsonld"}}