GPT-5.4 Pro

• 🧠 Pro-tier GPT-5.4 model for complex, high-stakes reasoning.
• 📏 1M+ token context: 922K input, 128K output.
• 👁️ Accepts text and image inputs.
• 🔧 Supports reasoning, function calling, and web search.
• ⚡ Reasoning effort selectable at medium, high, or xhigh.
• 🆕 Builds on GPT-5.4's unified architecture with enhanced reasoning.
• 🎯 Uses extra compute to think harder for precision.
• 🗓️ Released March 2026 by OpenAI.

OpenAI

OpenAI is an American artificial intelligence research organization headquartered in San Francisco, structured as both a for-profit public benefit corporation and a nonprofit foundation. The lab developed the GPT family of large language models, the DALL-E…

GPT-5.4 Pro is the Pro-tier model in OpenAI's GPT-5.4 generation, building on the unified architecture introduced with GPT-5.4 and adding enhanced reasoning. It targets complex, high-stakes work — agentic coding, long-context workflows, and multi-step problem solving — where consistency and depth matter most.

The defining trait versus its base sibling is compute. According to OpenAI's developer documentation, GPT-5.4 Pro "uses more compute to think harder and provide consistently better answers," and exposes reasoning effort settings of medium, high, and xhigh. By contrast, GPT-5.4 also offers lower none and low effort tiers as a broader frontier default. Both share the same roughly 1.05M-token context window; OpenAI notes that prompts above 272K input tokens are billed at higher multipliers for the full session.

In feature terms, GPT-5.4 Pro carries a 1M+ token context (922K input, 128K output) and accepts both text and image inputs, with capabilities spanning reasoning, vision, function calling, and web search.

GPT-5.4 Pro is no longer OpenAI's newest Pro-tier release: it was succeeded by GPT-5.5 Pro in April 2026. Catalog siblings include the lighter GPT-5.4 Mini and the earlier GPT-5.2. Independent, primary benchmark figures for GPT-5.4 Pro were not available at the time of writing, so specific scores are omitted here.