Episode 057: GPT-5.5 Replaces GPT-5.3 as ChatGPT's Default Model
Episode Description GPT-5.5 Replaces GPT-5.3 as ChatGPT's Default Model OpenAI made GPT-5.5 the new default in ChatGPT, rolling it out as GPT-5.5 Instant to replace GPT-5.3 Instant, with cited gains in accuracy, image understanding, STEM, and web behavior. The GPT-5.2 family was retired on June twelfth — less than three months after its own launch — a pace that signals model version is now a first-class operational dependency requiring automated evaluation and prompt migration plans. Also this week, FERC issued show-cause orders to six major grid operators and committed to national large-load interconnection rules by June 2026, and CISA's advisory coverage of OT vulnerabilities dropped to just twenty-two percent in 2025, leaving compliance programs that rely on those advisories potentially blind to most known exposures. ...