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GPT-5.4-Pro

OpenAI · GPT-5

API-ready premium GPT-5 escalation tier for decision-ready analysis and demanding professional workflows.

Part of GPT family · Other versions: GPT-5.5 Pro , GPT-5.5 , GPT-Rosalind , GPT-5.4 mini , GPT-5.4 nano , GPT-5.4 , GPT-5.3 , GPT-5.3-Codex , GPT-5.2-Codex , GPT-5.2-Pro , GPT-5.2 , GPT-5-Codex , GPT-5 mini , GPT-5 , GPT-5 nano , GPT-4.1 , GPT-4o mini Transcribe , GPT-4o mini TTS , GPT-4o Transcribe , GPT-4o mini , GPT-4o
Type
language
Context
1M tokens
Max Output
128K tokens
Status
current
Input
$30/1M tok
Output
$180/1M tok
API Access
Yes
License
proprietary
frontier reasoning high-accuracy coding analysis tool-use computer-use long-context
Released March 2026 · Updated April 26, 2026

Overview

Freshness note: Model capabilities, limits, and pricing can change quickly. This profile is a point-in-time snapshot last verified on April 26, 2026.

GPT-5.4-Pro is OpenAI’s premium compute-heavy GPT-5 option from the March 5 GPT-5.4 launch. OpenAI positioned it for work where answer quality, reliability, and longer agent execution matter more than latency or spend efficiency. As of April 26, 2026, GPT-5.5 Pro is the newer premium route across eligible ChatGPT, Codex, and API workflows, while GPT-5.4-Pro remains relevant for existing integrations and compatibility planning.

Capabilities

This tier is meant for hard synthesis, decision memos, high-stakes reviews, difficult engineering tasks, and escalation-stage agent work where iterative cleanup is expensive. It is not a sensible always-on default. It is the model you route to when the cost of a weak first pass is greater than the cost of a premium inference path.

Technical Details

OpenAI’s GPT-5.4 launch frames the Pro tier as part of the same long-context and computer-use-capable family as GPT-5.4, with higher compute per answer and a steeper price curve. Signal Lens stores the top-level “up to 1M” context claim in frontmatter for consistency with the launch materials, but teams should still read OpenAI’s standard 272K context note carefully when planning cost and request design.

The practical difference versus regular GPT-5.4 is not just a small quality bump. Pro is for situations where better first-pass judgment, longer reasoning chains, and reduced reviewer cleanup justify a large premium.

Pricing & Access

Published API pricing (per 1M tokens):

  • Input: $30.00
  • Output: $180.00

This is an escalation-tier pricing band. OpenAI lists GPT-5.4 Pro in the API and in premium product surfaces where enabled, but teams should assume tighter usage controls and more selective rollout than on everyday GPT tiers. Teams choosing a premium OpenAI escalation route should now compare it against the API-listed GPT-5.5 Pro path.

Best Use Cases

Use GPT-5.4-Pro selectively for executive-ready memos, difficult architecture reviews, risk-heavy technical analysis, and long multi-step workflows where stronger reasoning quality can justify a very large cost premium and an existing GPT-5.4-Pro integration is already the right operational fit. It is best used as a second-stage escalation route after a cheaper model has already narrowed the problem.

Comparisons

  • GPT-5.5 Pro (OpenAI): Newer premium route across eligible ChatGPT, Codex, and API workflows.
  • 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.