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Model

Who uses GPT-5.5

2 people list GPT-5.5 as their model, 1 more use it alongside something else. Newest evidence: Peter Steinberger, Jul 7, 2026.

Paired with

The harness these people run with GPT-5.5.

Amp1OpenClaw1
Mitchell Hashimoto
Developer; co-founder of Superlogical
HarnessAmp
ModelGPT-5.5
Peter Steinberger
OpenAI agent builder; OpenClaw creator
HarnessOpenClaw
ModelGPT-5.5
Works at a lab

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Also in the mix

  • Simon Willison · Available in ChatGPT Work alongside the GPT-5.6 family.