According to @godofprompt on Twitter, a recent leak from Vertex AI's error log has revealed details about the upcoming Claude Sonnet 5 model. The model is rumored to be over 50% cheaper than Opus 4.5, with a maintained 1 million token context window but faster performance. Notably, Claude Sonnet 5 is said to support spawning parallel sub-agents directly from the terminal and reportedly achieves 80.9% on the SWE-bench benchmark. The most significant rumored feature is a 'dev team mode,' enabling users to provide a brief and have autonomous agents build entire features. While these details are unverified, if accurate, they signal a major shift in AI-powered coding agent capabilities, offering substantial business opportunities for enterprises seeking scalable automation solutions.