GPT-4o Mini

GPT-4o Mini is OpenAI's compact, cost-efficient member of the GPT-4 "omni" family, designed to bring much of GPT-4o's capability to high-volume, latency-sensitive workloads. OpenAI positions it as a fast, affordable small model for focused tasks, accepting both text and image inputs and producing text outputs including Structured Outputs. It carries a 128K-token context window, supports up to 16,384 output tokens per request, and has knowledge up to October 2023.

Compared with its own predecessor in the small-model line, GPT-3.5 Turbo, OpenAI reports that GPT-4o Mini surpasses it on academic benchmarks across both textual intelligence and multimodal reasoning, adds vision support, and delivers improved long-context and function-calling performance. It also shares the improved tokenizer used by GPT-4o, making non-English text handling more efficient, and model outputs from larger models can be distilled into it for similar results at lower cost.

Within this catalog's family lineage, GPT-4o Mini has since been succeeded by GPT-5.4 Mini, which OpenAI describes as one of its most capable small models with a 400K context window and broader tool support including web search, file search, and computer use. According to OpenAI, GPT-5.4 mini consistently outperforms earlier small models at similar latencies, reflecting the family's generational progress.

For developers, GPT-4o Mini remains suited to chaining or parallelizing multiple model calls, processing large context volumes, and powering real-time chatbots where cost and speed matter.

Sources

GPT-4o mini Model | OpenAI API· developers.openai.comGPT-4o mini: advancing cost-efficient intelligence | OpenAI· openai.como4-mini Model | OpenAI API· platform.openai.com

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