GPT-5.2 Family Released
Narrative
Most capable model for professional knowledge work. 70.9% beats/ties human experts on GDPval tasks across 44 occupations. 98.7% accuracy on Tau2-bench telecom. 11x faster than experts, <1% cost. Three tiers: Instant, Thinking, Pro.
Reality
Released early December in response to Gemini 3 (internal "code red"). August 2025 knowledge cutoff. 30% fewer response-level errors vs GPT-5.1 Thinking. Custom GPTs migrated January 12, 2026. Updated default personality more conversational. Under-18 principles strengthened.
Implication
Professional knowledge work automation milestone. First model at/above human expert level on GDPval. Competitive pressure response to Gemini 3. Vision + long-context improvements. Artifact creation enhanced for slides/spreadsheets. Models retired Feb 13: GPT-5, GPT-4o, GPT-4.1, o4-mini.