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GPT-5.4-Pro

OpenAI · GPT-5

Highest-capability GPT-5 tier for decision-ready analysis and the most demanding professional workflows.

Part of GPT family · Other versions: GPT-5.3-Codex , GPT-5.3 , GPT-5.4 , GPT-5.2-Codex , GPT-5.2-Pro , GPT-5.2 , GPT-5-Codex , GPT-5 nano , GPT-5 mini , GPT-5 , GPT-4.1 , GPT-4o mini Transcribe , GPT-4o mini TTS , GPT-4o Transcribe , GPT-4o mini , GPT-4o
Type
language
Context
400K tokens
Max Output
128K tokens
Status
current
Input
$25/1M tok
Output
$200/1M tok
API Access
Yes
License
proprietary
frontier reasoning high-accuracy coding analysis tool-use
Released March 2026 · Updated March 6, 2026

Overview

Freshness note: Model capabilities, limits, and pricing can change quickly. This profile is a point-in-time snapshot last verified on March 6, 2026.

GPT-5.4-Pro is OpenAI’s premium compute-heavy GPT-5 option. OpenAI positions it as the highest-capability tier in the lineup for the most demanding professional work where answer quality matters more than speed or cost.

Capabilities

This tier is meant for hard synthesis, decision memos, high-stakes reviews, and difficult engineering or strategic work where iterative cleanup is expensive. It fits escalation routing better than always-on default use.

Technical Details

OpenAI’s model docs list GPT-5.4-Pro with the same 400K context window and 128K max output class as GPT-5.4, but with substantially higher pricing and more compute allocated per answer. OpenAI Academy frames it as the option for work that needs to be close to decision-ready on the first pass.

Pricing & Access

Published API pricing (per 1M tokens):

  • Input: $25.00
  • Output: $200.00

This is an escalation-tier pricing band. OpenAI lists GPT-5.4-Pro in the API and as a higher-end option in ChatGPT surfaces where enabled.

Best Use Cases

Use GPT-5.4-Pro selectively for executive-ready memos, difficult architecture reviews, risk-heavy technical analysis, and other tasks where small quality gains can justify a very large cost premium.

Comparisons

  • GPT-5.4 (OpenAI): Better general premium default for most hard tasks.
  • GPT-5.3-Codex (OpenAI): Better cost/performance for repository-heavy coding workflows.
  • Claude Opus 4.6 (Anthropic): Another premium model choice for teams comparing top-end quality across vendors.