Anthropic releases Sonnet 4.6 | TechCrunch
Anthropic has released a new version of its mid-range Sonnet model, keeping pace with the company’s four-month update cycle. In a message announcing the new modelAnthropic emphasized improvements in coding, instruction following, and computing.
Sonnet 4.6 will become the standard model for Free and Pro plan users.
The Sonnet 4.6 beta will include a 1 million token context window, twice the size of the largest window previously available for Sonnet. Anthropic described the new context window as “enough to hold entire codebases, long-term contracts, or dozens of research papers in a single request.”
The release comes just two weeks after the launch of Opus 4.6, with an updated Haiku model likely to follow in the coming weeks.
The launch is accompanied by a new set of record benchmark scores, including OS World for computing and SWE-Bench for software engineering. But perhaps most impressive is the score of 60.4% on ARC-AGI-2, intended to measure skills specific to human intelligence. The score puts Sonnet 4.6 above most comparable models, although it still lags behind models like Opus 4.6, Gemini 3 Deep Think and a refined version of GPT 5.2.
