The one GPT-5.5 benchmark OpenAI didn’t put in the launch post and why it matters for your critical AI literacy.
GPT-5.5 launched April 23, 2026.
It tops every benchmark that matters for builders.
Terminal-Bench. OSWorld. GDPval. ARC-AGI-2. Long-context MRCR. A real jump.
It’s also the most confidently wrong flagship on the market.
If you’re new here, welcome! Here’s what you might have missed:
→Claude Design Review: 48-Hour Builder’s Test + Hero Prompts
→I Mapped the Opus 4.7 Release to Your Role, Goals, and Real Workflows
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