GPT-5.5 Outperforms (and Hallucinates), Kimi K2.6 Leads Open LLMs, AI Strains Climate Pledges, Strategic Thinking in LLMs vs. Humans
AI Summary
OpenAI's GPT-5.5 tops key objective benchmarks like ARC-AGI-2 and Artificial Analysis Intelligence Index but struggles with hallucinations, ranking third on knowledge calibration behind Gemini and Claude. The newsletter also promotes Andrew Ng's new course 'AI Prompting for Everyone' covering advanced prompting techniques for ChatGPT, Claude, and Gemini. Additional topics teased include Kimi K2.6 leading open LLMs and AI's strain on climate pledges.
Key Facts
Author Takes
GPT-5.5 hallucination problem
GPT-5.5 knows more than its peers but answers incorrectly more often and acknowledges ignorance less often, making it less trustworthy despite leading objective benchmarks.
AI prompting evolution
The ways we prompt AI are very different in 2026 than 2022, with models now capable of thinking for minutes, ingesting many documents, and using tools — but most users still only ask short questions.
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