GPT-5.5 Pro dominates enterprise automation, achieving a 22% error reduction in complex browser and desktop tasks compared to GPT-5. Launched April 24, 2026, it is the most-requested API model, with instruction persistence across multi-step tasks and superior tool orchestration in agentic pipelines. This makes it the go-to solution for enterprise automation workflows deployed in May 2026, outperforming #2 Claude Opus 4.7 for task completion consistency.
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