2 parts · July 24, 2026 — read in order, start to finish.
GPT-5.6 can now write JavaScript that orchestrates your tools in a sandbox instead of round-tripping every call through its context. Here is when that saves you money — and when it just adds a layer.
GPT-5.6 can spawn and synthesize a swarm of subagents inside a single API call — no orchestration code. That's a gift for prototypes and a trap for anything you need to observe, checkpoint, or route across models.
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