GPT-5.4 Thinking
The most advanced GPT-5 model for complex professional work, reasoning, coding, tool use, and long-context tasks.
Technical specification
Modalities
Capabilities
11Reasoning★
Reasoning
Multi-step reasoning★
Reasoning
Long context★
Reasoning
Coding★
Coding
Function Calling
Planning
Structured output★
Structured gen.
Image understanding★
Vision
OCR★
Vision
Multilingual★
Language
Planning★
Planning
Streaming output
Reasoning
Applications
Security and enterprise
GPT-5.4 Thinking inherits the publicly documented platform-level security measures of OpenAI. Enterprise and security information is documented primarily for the API, ChatGPT Enterprise, Business, and Edu tiers, rather than as a separate security profile for the Thinking variant.
Technical information
It should be noted in the catalog that the security information reflects platform-level inherited security, not benchmark security of a specific model variant.