Introducing GPT-5.4

What changed

Introducing GPT-5.4, OpenAI’s most most capable and efficient frontier model for professional work, with state-of-the-art coding, computer use, tool search, and 1M-token context.

Why it matters

A concrete addition to Practical AI: Tools, Models & Frameworks: it changes what's available to builders today rather than being general commentary.

How it compares

Related prior coverage to compare against:

• Introducing GPT-5.2
• Introducing GPT-5.5
• Introducing GPT-5

• Introducing GPT-5.2 similarity 0.51
• Introducing GPT-5.5 similarity 0.25
• Introducing GPT-5 similarity 0.24