Anthropic’s April 16 release of Claude Opus 4.7, which improved advanced coding and long-running agent tasks, has set the stage for the next iterative update. Leaks of Sonnet 4.8 and Opus 4.8 model identifiers in Claude Code source maps and on Google Vertex AI in late March through May indicate active development and internal testing, consistent with Anthropic’s historical cadence of shipping Sonnet variants shortly after corresponding Opus models. Competitive pressure from OpenAI and Google continues to drive rapid iteration cycles, while the absence of an official announcement or benchmark keeps release timing uncertain. Traders are watching for a public launch window in May or June that would align with typical post-Opus patterns and API availability.