{"slug": "i-tested-claude-sonnet-5-vs-opus-4-8", "title": "I Tested Claude Sonnet 5 vs Opus 4.8", "summary": "Anthropic's new Claude Sonnet 5 outperformed its flagship Opus 4.8 in tests conducted by a user, challenging expectations for midsize models. The results highlight the rapid advancement of AI model capabilities.", "body_md": "A midsize model is not supposed to embarrass the flagship. But when I ran Anthropic’s brand-new Claude Sonnet 5 against Opus 4.8 and the…\nContinue reading on Towards AI »", "url": "https://wpnews.pro/news/i-tested-claude-sonnet-5-vs-opus-4-8", "canonical_source": "https://pub.towardsai.net/i-tested-claude-sonnet-5-vs-opus-4-8-b6dfa27596c3?source=rss----98111c9905da---4", "published_at": "2026-07-01 07:18:06+00:00", "updated_at": "2026-07-01 07:55:16.610536+00:00", "lang": "en", "topics": ["large-language-models", "ai-products", "ai-research"], "entities": ["Anthropic", "Claude Sonnet 5", "Opus 4.8"], "alternates": {"html": "https://wpnews.pro/news/i-tested-claude-sonnet-5-vs-opus-4-8", "markdown": "https://wpnews.pro/news/i-tested-claude-sonnet-5-vs-opus-4-8.md", "text": "https://wpnews.pro/news/i-tested-claude-sonnet-5-vs-opus-4-8.txt", "jsonld": "https://wpnews.pro/news/i-tested-claude-sonnet-5-vs-opus-4-8.jsonld"}}