GPT-4o

The flagship multimodal large language model released by OpenAI in May 2024, designed to accept and generate text, images, and audio in a single unified model architecture rather than through separate specialized models stitched together. The 'o' in GPT-4o stands for 'omni,' reflecting the model's native multimodality. GPT-4o processes text, images, and audio natively, enabling real-time voice conversations with human-like response latency, visual understanding of photographs and documents, and seamless switching between modalities within a single conversation. Its text and code capabilities are comparable to GPT-4 Turbo while operating at significantly faster inference speeds and lower cost per token. GPT-4o became the default model in ChatGPT for most users and demonstrated a qualitative shift in AI assistant interaction, particularly through its voice mode which could interpret emotional cues in speech and respond with naturalistic conversational patterns. Example: GPT-4o's live demo at OpenAI's May 2024 presentation showed the model solving math problems by looking at handwritten equations through a camera, providing real-time voice tutoring while adapting tone based on the student's emotional state, and switching seamlessly between English and Spanish mid-conversation, all within a single model inference session rather than through multiple specialized systems. Why it matters for AI: GPT-4o represented a significant step toward genuinely multimodal AI assistants that interact with the world across all human communication channels simultaneously. Its demonstration of emotion-aware voice interaction raised both excitement about AI assistant potential and concerns about anthropomorphization and emotional manipulation. The model's capabilities also accelerated investment in multimodal AI applications across enterprises and consumer products throughout 2024-2025.

Explore the full Web3 Glossary — 2,000+ expert-curated definitions. Need guidance? Talk to our consultants.