What happened
Anthropic released Sonnet 4.6, an upgraded mid-size AI model, on February 17, 2026. This update introduces a beta 1 million token context window, doubling previous capacity, and significantly enhances coding, computer use, and agent planning capabilities. Sonnet 4.6 now serves as the default model for free and Pro plan users, maintaining existing pricing. This launch follows the Claude Opus 4.6 release on February 5, reinforcing Anthropic's consistent four-month update cycle.
Why it matters
CTOs and architects face accelerated model evaluation cycles because Anthropic maintains a predictable four-month update cadence. This consistent release pattern, following the Claude Opus 4.6 launch, intensifies competition within the enterprise AI market. Procurement teams must therefore adapt purchasing strategies to rapidly evolving model capabilities, balancing performance and cost. Founders and investors recognise Anthropic's aggressive product roadmap, challenging established vertical AI software providers and driving further market consolidation.
Subscribe for Weekly Updates
Stay ahead with our weekly AI and tech briefings, delivered every Tuesday.
