Story perspectives

OpenAI Debuts GPT-5.5 with Multi-Step Tools, High-Risk Flag

4/24/2026

Summary

OpenAI Launches GPT-5.5

OpenAI launched GPT-5.5 on April 23, 2026 for Plus, Pro and Business users and can plan multi-step tasks, use tools, self-check work and code.
It scored 82.7% on Terminal-Bench 2.0, 58.6% on SWE-Bench Pro and 84.9% on GDPval.
Pricing is $5 per million input tokens and $30 per million output, with the Pro tier costing $30/$180.
OpenAI labeled GPT-5.5 high risk for biology, chemistry and cybersecurity, safeguards and API access soon.

Summary

OpenAI Leverages GPT-5.5

OpenAI positions GPT-5.5 as a competitive edge against Anthropic to win business customers and offset high costs.
Both firms may IPO by 2026, pressuring them to boost revenue with GPT-5.5 and Anthropic’s Mythos.
OpenAI plans a “super app” that merges its chatbot, coding tool and browser around GPT-5.5.
Mark Chen says “orchestrators” will guide AI research, with executives Mia Glaese and Jakub Pachocki noting it raises the threshold for worthwhile research.

History

Historical Context

In October 2015 AlphaGo defeated European champion Fan Hui without handicap, the first such win for a computer Go program. Building on that, the March 2016 five-game match saw AlphaGo beat world champion Lee Sedol 4-1, prompting China to treat the event as a “Sputnik moment” and boost AI funding. The breakthrough set a precedent that underlies today’s GPT-5.5 launch in April 2026.

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OpenAI Launches GPT-5.5

OpenAI launched GPT-5.5 on April 23, 2026 for Plus, Pro and Business users and can plan multi-step tasks, use tools, self-check work and code.
It scored 82.7% on Terminal-Bench 2.0, 58.6% on SWE-Bench Pro and 84.9% on GDPval.
Pricing is $5 per million input tokens and $30 per million output, with the Pro tier costing $30/$180.
OpenAI labeled GPT-5.5 high risk for biology, chemistry and cybersecurity, safeguards and API access soon.

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