OpenAI
GPT-5.4 nano
GPT-5.4 nano is an AI model released by OpenAI on Tuesday, Mar 17 2026, the same day as GPT-5.4 mini. Benchmark results (shown below) cover BullshitBench v2.
Benchmarks
Nonsense detection
BullshitBench v2Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better.
14%