Anthropic's recent cadence in the Claude 5 family shapes trader views on the next Sonnet (5.6+), following the September 28 launch of Sonnet 5.5—a faster, lower-cost upgrade over Sonnet 5 with improved agentic coding and 30%+ output speed gains at the same $2/$10 per million token pricing. The October 7 Haiku 5.5 release and ongoing platform updates, including cheaper cache reads, reinforce expectations of continued rapid iteration. Competitive pressure from OpenAI and Google models, plus Anthropic's focus on agentic performance and safety features, supports the current implied probability that the company will deliver the next major Sonnet variant within typical 3–4 month cycles, though no specific timeline or 5.6 details have been confirmed.