GPT-5.4 Pro
The highest-quality GPT-5.4 variant, using increased compute to handle highly complex problems; available in ChatGPT and via API.
Technical specification
Modalities
Capabilities
17Reasoning★
Reasoning
Multi-step reasoning★
Reasoning
Long context★
Reasoning
Coding★
Coding
Function Calling
Planning
Structured output★
Structured gen.
Audio understanding
Audio
Image understanding★
Vision
Video Understanding
Other
Chart understanding
Vision
Diagram reasoning
Reasoning
OCR★
Vision
Multilingual★
Language
Planning★
Planning
Streaming output
Reasoning
Interleaved Multimodal Input
Reasoning
Multimodal understanding★
Multimodality
Architecture and technologies
Form / Family
2Applications
Public pricing per 1M tokens. For GPT-5.4 Pro, short context and long context rates apply: short context — $15 input / $90 output; long context — $30 input / $135 output. For models with a 1.05M token window, the higher rates apply to long context exceeding 272K input tokens.
Security and enterprise
Public security information for GPT-5.4 Pro derives from OpenAI's security policies and architecture for the API platform and ChatGPT Enterprise/Business/Edu products. The vendor describes security primarily at the service level, rather than in a separate model-specific document for the Pro variant.
Technical information
For GPT-5.4 Pro, security should be modeled as platform security inherited from the OpenAI environment. This is the most accurate and substantively correct framing.