Anthropic’s June 30 release of Claude Sonnet 5, its most agentic mid-tier large language model yet with strong gains in tool use, coding, and autonomous planning that approach Opus 4.8 performance at lower cost, anchors current trader views on the next Sonnet. Historical cadence—Sonnet 4.6 in February followed by the June update—points to a likely October or November window, reinforced by market-implied probabilities clustering around mid-October. No official roadmap or fresh leaks have emerged in recent weeks, though broader competitive pressure from OpenAI’s GPT iterations and Google’s Gemini updates continues to influence timing expectations. Traders are watching for any developer conference signals or internal benchmark hints that could accelerate or delay the follow-on model.