What is GPT-4o? (GPT-4 Omni)

GPT-4o is OpenAI's multimodal flagship model powering ChatGPT. Learn how it combines text, vision, and audio capabilities for faster AI responses.

GPT-4o (the 'o' stands for 'omni') launched in May 2024 as OpenAI's most capable widely-available model. It matches GPT-4 Turbo's intelligence while being twice as fast and 50% cheaper via API. Most importantly for marketers: it's the default model behind ChatGPT's 100M+ weekly users.

Why it matters

GPT-4o is the AI that most consumers actually interact with. When ChatGPT's 100M+ weekly users ask about products, compare services, or research brands, GPT-4o generates those responses. For marketers, this isn't abstract technology - it's a specific system shaping how your brand is perceived and recommended. The model's multimodal capabilities also mean it can analyze visual brand assets, not just text. Logos, product images, and marketing materials all influence how GPT-4o understands and represents your brand. Understanding this model's architecture helps you optimize for the AI-driven discovery that's increasingly replacing traditional search.

What people get wrong

• GPT-4o is just a faster version of GPT-4. GPT-4o is architecturally different - it's a natively multimodal model trained from the ground up to process text, vision, and audio together, not a speed optimization of the original GPT-4.
• The 'o' stands for 'output' or 'optimized'. The 'o' stands for 'omni,' reflecting the model's ability to handle multiple modalities (text, audio, vision) in a single unified system.
• GPT-4o-mini is just a limited version of GPT-4o. GPT-4o-mini is a separately trained smaller model optimized for cost efficiency. It's not GPT-4o with features removed - it's a distinct model targeting different use cases.

Related terms

GPT: GPT-4o belongs to OpenAI's GPT family of large language models, representing the latest flagship architecture.

ChatGPT: ChatGPT is the consumer interface powered by GPT-4o, making it the primary way users interact with this model.

Multimodal AI: GPT-4o is a leading example of multimodal AI, processing text, images, and audio in a unified system.

Track Your Brand Visibility in GPT-4o Responses

Since GPT-4o powers the majority of ChatGPT interactions, understanding how it represents your brand is increasingly important. Trakkr monitors how your brand appears in AI-generated responses across major models including GPT-4o, helping you identify gaps between how AI describes your brand and how you want to be positioned.