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Model · OpenAI · Text

GPT-5.4 mini

OpenAI's strongest small model for coding, computer use, and subagents. The efficient, lower-cost tier of the GPT-5 line and the named replacement for o4-mini.

Modality
Text
License
Proprietary (Proprietary)
Context window
400,000 tokens
Released
March 17, 2026
Last verified
June 8, 2026
Runs locally
No
Also handles
vision

Strengths

  • Strong coding, computer-use, and agentic performance for the price
  • 400k-token context (128k max output)
  • Low cost ($0.75 input / $4.50 output per MTok)

Weaknesses

  • Less depth than GPT-5.5 on the hardest problems
  • Closed weights — API/product only

Try it

WhereTypeNotes
OpenAI API hosted-api API key required
ChatGPT product Free / paid tiers

Version history

  1. GPT-5.5 Apr 2026
  2. GPT-5.4 mini Mar 2026 Current
  3. GPT-5.3-Codex Feb 2026

Official sources

Change log

  • — Initial entry (2026-06-08 catalog refresh, Tier 3). Released 2026-03-17; OpenAI's named replacement for o4-mini.

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