{"slug": "anthropic-s-claude-sonnet-5-5-nearly-matches-opus-5-5-on-benchmarks-while-up-to", "title": "Anthropic's Claude Sonnet 5.5 nearly matches Opus 5.5 on benchmarks while costing up to 30 percent less per task", "summary": "Anthropic released Claude Sonnet 5.5, the second model in its Claude 5.5 family, which generates output more than 30 percent faster and costs up to 30 percent less per task while nearly matching Opus 5.5 on knowledge-work benchmarks. On Terminal-Bench, a coding benchmark, Claude Sonnet 5.5 jumps from 10.3 to 70.6 percent. Anthropic said Haiku 5.5 will arrive in the coming weeks, giving it a direct counterpart to each of OpenAI's three GPT-6 models.", "body_md": "Anthropic has released Claude Sonnet 5.5, the second model in its Claude 5.5 family. It generates output more than 30 percent faster, costs up to 30 percent less per task, and nearly matches Opus 5.5 on knowledge-work benchmarks. On Terminal-Bench, a coding benchmark, the model jumps from 10.3 to 70.6 percent. With Haiku 5.5 announced for the coming weeks, Anthropic will soon have a direct counterpart to each of OpenAI's three GPT-6 models.\n\nThe article [Anthropic's Claude Sonnet 5.5 nearly matches Opus 5.5 on benchmarks while costing up to 30 percent less per task](https://the-decoder.com/anthropics-claude-sonnet-5-5-nearly-matches-opus-5-5-on-benchmarks-while-costing-up-to-30-percent-less-per-task/) appeared first on [The Decoder](https://the-decoder.com).", "url": "https://wpnews.pro/news/anthropic-s-claude-sonnet-5-5-nearly-matches-opus-5-5-on-benchmarks-while-up-to", "canonical_source": "https://the-decoder.com/anthropics-claude-sonnet-5-5-nearly-matches-opus-5-5-on-benchmarks-while-costing-up-to-30-percent-less-per-task/", "published_at": "2026-09-28 18:02:10+00:00", "updated_at": "2026-09-28 18:17:41.136329+00:00", "lang": "en", "topics": ["artificial-intelligence", "large-language-models", "ai-products", "ai-tools"], "entities": ["Anthropic", "Claude Sonnet 5.5", "Claude Opus 5.5", "Claude Haiku 5.5", "OpenAI", "GPT-6", "Terminal-Bench"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/anthropic-s-claude-sonnet-5-5-nearly-matches-opus-5-5-on-benchmarks-while-up-to", "markdown": "https://wpnews.pro/news/anthropic-s-claude-sonnet-5-5-nearly-matches-opus-5-5-on-benchmarks-while-up-to.md", "text": "https://wpnews.pro/news/anthropic-s-claude-sonnet-5-5-nearly-matches-opus-5-5-on-benchmarks-while-up-to.txt", "jsonld": "https://wpnews.pro/news/anthropic-s-claude-sonnet-5-5-nearly-matches-opus-5-5-on-benchmarks-while-up-to.jsonld"}}