OpenAI GPT-5.6 Sol Ships Faster Parallel Tool-Use for Agents
Ploy's migration guide documents GPT-5.6 Sol, OpenAI's new flagship model, which delivers significantly faster agentic task completion through aggressive parallel tool-call fanning — a behavioural departure from previous models. For defenders, this parallelism expands the blast radius of a compromised agent session, as more tool calls execute concurrently before any human or automated review can intercept them. Teams running production agents should reassess tool-call budgets, rate limits, and tracing assumptions that were calibrated to sequential incumbents like Claude Opus.