Claude Sonnet 4.6 is here with a 1 million token context window, but there’s a catch February 18, 2026 by admin Tweet Anthropic just released Claude Sonnet 4.6 with improved coding, computer use, and a 1-million-token context window. But not everyone gets the longer chats just yet. Read more… Neowin Related Posts:Anthropic launches Claude Sonnet 4.5, claims it's…Anthropic unveils Claude 3.5 Sonnet, claiming it…Anthropic launches updated Claude 3.5 Sonnet model…Anthropic releases Claude 3.7 Sonnet, its new AI…Claude Sonnet 4.6 arrives in GitHub Copilot to…