GPT-5.4
modelCurrent flagship model. 1M token context. Knowledge cutoff August 31, 2025. Available in thinking, pro, mini, and nano variants. Architecture and parameters undisclosed.
GPT-5.4 is the highest-scoring OpenAI model on Artificial Analysis with an Intelligence Index of 57. Mini variant (March 17, 2026) has 400K context and AA index 48. Proprietary.
Model Details
Context window 1,000,000
Variants
| Name | Parameters | Notes |
|---|---|---|
| GPT-5.4 Thinking | — | — |
| GPT-5.4 Pro | — | — |
| GPT-5.4 Mini | — | 400K context, AA index 48 |
| GPT-5.4 Nano | — | — |