Artificial intelligence · December 2025

GPT-5.2

OpenAI's fast answer to Gemini 3, in Instant, Thinking and Pro tiers.

OpenAI shipped GPT-5.2 about three weeks after Gemini 3 Pro, following an internal 'code red'. GPT-5.2 Pro was the model behind the first AI-assisted solutions to open Erdős problems in January 2026.

See it in the living tree Wikipedia Source

Arcs above join it to what it stood on, arcs below to what it led to. The bar places this stretch on the tree's whole timeline.

What it built on 1

GPT-5 2025

What it led to 2

AI starts solving Erdős problems 2026
GPT-5.4 2026

Related measurements

The dashed line marks when it first worked.

Best AI score on GPQA Diamond Latest: 95.8 % correct (2026) Source: Epoch AI, Capabilities & benchmarking (benchmark_data.zip, gpqa_diamond.csv); Anthropic: Claude 3 public launch (March 4, 2024)

Training compute of notable AI models Source: Epoch AI, Notable AI Models (CC BY 4.0)