OpenAI GPT

GPT (Generative Pre-trained Transformer) is the foundation of the modern AI revolution. In 2025, GPT-5 offers agentic capabilities, deep reasoning, and native multimodal integration.

When to Use

• General Purpose: It is the baseline for all AI tasks.
• Complex Reasoning: GPT-5 excels at multi-step logic and planning.
• Vision/Voice: Native "Omni" capabilities (GPT-4o/5) process audio and video with <300ms latency.

Core Concepts

Models

• GPT-5: The frontier model. Slow but smartest.
• GPT-4o: "Omni". Fast, multimodal, cheaper.
• o1 / o3: "Reasoning" models that "think" before answering (Chain of Thought).

Assistants API