Forensic Summary
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.
Read the full technical deep-dive on Grid the Grey: https://gridthegrey.com/posts/openai-gpt-5-6-sol-ships-faster-parallel-tool-use-for-agents/
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