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GPT-5.4
AvailableOpenAIFrontierProprietary
Workhorse GPT-5 release with a dedicated Thinking mode; widely deployed across ChatGPT and the API.
Specifications
- License
- Proprietary
- Weights
- Not released
- Architecture
- Mixture-of-Experts
- Parameters
- Undisclosed
- Context window
- 400K tokens
- Max output
- 100K tokens
- Knowledge cutoff
- Oct 31, 2025
- Price (in / out, $/M)
- —
- Modalities
- TextVisionCode
Benchmarks
SWE-bench Verifiedself-reported
74.9%GPQA Diamondself-reported
86.5%Vendor-reported figures are claims until independently verified. See methodology.