GPT-4o mini is OpenAI's small, fast model optimised for high-throughput, cost-sensitive applications. At $0.15/M input and $0.60/M output tokens it is roughly 15× cheaper than GPT-4o while still outperforming GPT-3.5 Turbo on most benchmarks. It supports the same function calling, JSON mode, and vision capabilities as its larger sibling.
Key capabilities
- Ultra-low latency — optimised for real-time response in chatbots and copilots
- Vision support — can process images alongside text at the same low price point
- Function calling & structured outputs — suitable for tool-use and agentic pipelines
- 128K context window — the same generous context as GPT-4o
What it's best for
High-volume production workloads where per-call cost matters: customer support automation, document triage, coding autocomplete backends, content classification, and any pipeline that calls the model hundreds of thousands of times per day.