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%
#54 of 67Best: Claude Opus 4.8 · 95%
GPT-5.4 nano — frequently asked questions
- When was GPT-5.4 nano released?
- GPT-5.4 nano was released by OpenAI on Tuesday, Mar 17 2026.
- Who made GPT-5.4 nano?
- GPT-5.4 nano was built by OpenAI. Creators of ChatGPT and the GPT series of models. Pioneered large-scale language model research.
- What benchmark scores did GPT-5.4 nano get?
- GPT-5.4 nano reports 1 tracked benchmark score — BullshitBench v2: 14%. Scores are the figures published at release by OpenAI.
- Is GPT-5.4 nano open source?
- No. GPT-5.4 nano is a proprietary model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.
- What came before and after GPT-5.4 nano?
- OpenAI's previous tracked release was GPT-5.4 mini on Mar 17 2026. It was followed by GPT-5.5 on Apr 23 2026.