Last Week in AI #336 – Sonnet 4.6, Gemini 3.1 Pro, Anthropic vs PentagonBy Last Week in AI / February 24, 2026 Anthropic releases Sonnet 4.6Related:Claude Sonnet 4.6 model brings ‘much-improved coding skills’ and upgraded free tierClaude Sonnet 4.6 delivers frontier-level AI for free and cheap-seat usersAnthropic releases Claude Sonnet 4.6, continuing breakneck pace of AI model releases Read more