{"slug": "anthropic-releases-sonnet-5-5-which-it-calls-a-significantly-cheaper-faster-work", "title": "Anthropic releases Sonnet 5.5, which it calls a significantly cheaper, faster work partner", "summary": "Anthropic released Claude Sonnet 5.5, its mid-tier model, claiming it is 30 percent faster than Sonnet 5 with a significantly slower token burn rate. Anthropic said Sonnet 5.5 outperforms Opus 5.5 on agentic coding benchmarks and has \"comparable\" cyber capabilities to Opus 5, making it the first Sonnet model subject to the same cyber safeguards as Fable and Opus. Anthropic also said it plans to release a new version of its smallest model, Haiku, in the coming weeks without a firm date.", "body_md": "As the AI model wars continue, Anthropic has r[eleased the newest version of Sonnet](http://anthropic.com/claude-sonnet-5-5), the company’s mid-tier model, which it says will work much faster (and for significantly less) than its predecessor.\n\nThe lab describes Sonnet 5.5 as an ideal assistant for everyday tasks — including coding and creating office documents.\n\n5.5’s predecessor, Sonnet 5, [was announced](https://techcrunch.com/2026/06/30/anthropic-launches-claude-sonnet-5-as-a-cheaper-way-to-run-agents/) about three months ago. At the time, the model’s selling point was efficient agentic deployment — the ability to run agents at a lower cost than competitors.\n\nThe big selling point with 5.5, meanwhile, is speed. Anthropic claims that Sonnet 5.5 is 30 percent faster than its predecessor, and that its rate of token burn is significantly slower.\n\nIn the Anthropic hierarchy of models, Sonnet is less powerful than the Opus model, but can be more useful in certain circumstances because its agility. In particular, Anthropic’s benchmarks show Sonnet 5.5 performing better than Opus 5.5 on agentic coding, likely because of its ability to spawn multiple agents without exceeding cost limits.\n\nSonnet 5.5 is also said to have significant cyber capabilities, with the company claiming that it has “comparable” cyber capabilities to Opus 5. As a result, Anthropic says that 5.5 is the first Sonnet model that will be subject the same cyber safeguards that apply to Fable and Opus.\n\nThe company also plans to release a new version of Haiku — its smallest model — in the coming weeks, although it didn’t give a firm date as to when that would happen.\n\nThe last year has seen a flurry of new model releases from the major AI labs. Just last week, OpenAI [released a number of new models](https://techcrunch.com/2026/09/22/openai-launches-gpt-6-sol-and-luna/?_thumbnail_id=3162395) — including enhanced versions of Sol and Luna, its mid-tier and budget-friendly models. Meta also [announced a new model](https://techcrunch.com/2026/09/23/everything-new-coming-to-metas-ai-agent-muse/), which it said would power an upcoming feature associated with its smart glasses.", "url": "https://wpnews.pro/news/anthropic-releases-sonnet-5-5-which-it-calls-a-significantly-cheaper-faster-work", "canonical_source": "https://techcrunch.com/2026/09/28/anthropic-releases-sonnet-5-5-which-it-calls-a-significantly-cheaper-faster-work-partner/", "published_at": "2026-09-28 18:00:00+00:00", "updated_at": "2026-09-28 18:18:28.938884+00:00", "lang": "en", "topics": ["artificial-intelligence", "large-language-models", "ai-agents", "ai-safety", "ai-products"], "entities": ["Anthropic", "Claude Sonnet 5.5", "Claude Sonnet 5", "Claude Opus 5.5", "Claude Opus 5", "Haiku", "OpenAI", "Meta"], "also_reported_by": [], "alternates": {"html": "https://wpnews.pro/news/anthropic-releases-sonnet-5-5-which-it-calls-a-significantly-cheaper-faster-work", "markdown": "https://wpnews.pro/news/anthropic-releases-sonnet-5-5-which-it-calls-a-significantly-cheaper-faster-work.md", "text": "https://wpnews.pro/news/anthropic-releases-sonnet-5-5-which-it-calls-a-significantly-cheaper-faster-work.txt", "jsonld": "https://wpnews.pro/news/anthropic-releases-sonnet-5-5-which-it-calls-a-significantly-cheaper-faster-work.jsonld"}}