GPT-5.5 Pro (Xhigh)

Name: GPT-5.5 Pro (Xhigh)
Brand: OpenAI

GPT-5.5 Pro (Xhigh) is developed by OpenAI, released 2026-04-23.

Also written as: GPT 5.5 Pro (Xhigh)

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No API price is published for this model in our data source, so we show — rather than guess. It may be unreleased via API, open-weights only, or simply not tracked yet.

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