A 2025 OpenAI internal report found that GPT-5 Instant and GPT-5 Thinking reduced measured political bias by roughly 30% compared to GPT-4o, and that analysis of real-world ChatGPT usage showed less than 0.01% of responses exhibited signs of political bias.
October 08, 2025
high
statistical
Reported comparative bias reduction between model generations and measured prevalence of biased responses in user data.