GPT-4o ("omni") is OpenAI's primary frontier model, released in May 2024. It combines text, vision, and audio in a single model end-to-end — unlike earlier multimodal approaches that stitched separate models together. The result is faster response times and lower latency for voice applications.
Key specs: 128K context window, priced at $2.50/$10 per million input/output tokens, supports structured outputs with strict JSON schema mode, parallel function calling, and the Realtime API for low-latency voice.
In production it's the default choice for: broad general tasks, agent loops where speed matters, voice applications (via Realtime API), and cost-sensitive pipelines that need frontier-grade quality. Its main competitors at this tier are Claude Sonnet and Gemini 2.5 Pro. GPT-4o-mini is the budget version at $0.15/$0.60 — suitable for classification, routing, and simple extraction.
Bring this to your business
Knowing the term is one thing. Shipping it is another.
We do two-week AI Sprints — one term, one workflow, into production by Day 10.