GPT‑5.6 halves build time and trims AI agent costs by 27%
Ploy switched its production AI agent from Claude Opus to OpenAI's GPT‑5.6 Sol and saw builds complete in less than half the time while cutting costs by 27%. The migration required re‑tooling the evaluation harness and handling new parallel tool calls, showing that model upgrades can deliver immediate ROI but demand careful engineering.