Competition Shifts from Models to Infrastructure… Developers Redefined as ''Designers''
AI no longer merely generates answers. OpenAI''s Agents SDK update shows AI transitioning into an entity performing actual tasks — reading and writing files, executing code, performing system commands. The key innovation is sandbox-based execution enabling AI to work in isolated environments, securing both security and stability. The overall structure — model, tools, sandbox, orchestration — forms something close to an "AI operating environment." The essence: AI moves from "what it knows" to "what it can do." Previous agent systems failed due to structural limitations: separated models and execution environments, security vulnerabilities, complex tool connections. OpenAI''s harness-based structure integrates these as one system. Competition is shifting from model performance to execution infrastructure. Developers are evolving from implementers to orchestrators — designers coordinating AI''s work. Going forward, software may transition from tools people use to tools AI uses.
