GPT-5.4
OpenAI · March 2026
● activeClosedsparse moemultimodalAPI Available
Context Window400K tokens
VariantsGPT-5.4, GPT-5.4 Mini, GPT-5.4 Nano
Description
Expanded the GPT-5 series into a full model family with Mini and Nano tiers, allowing developers to choose between maximum intelligence, balanced performance, or minimal cost depending on their application.
Key Innovations
Reasoning
ReasoningStructured step-by-step problem solving, often using chain-of-thought or tree-of-thought approaches.
Agentic
AgenticModels that can autonomously plan, execute multi-step tasks, use tools, and self-correct without human intervention.