o4 Mini High: pricing, context and benchmarks

What you need to know about o4 Mini High

o4 Mini High was released by OpenAI (United States) on April 16, 2025. It accepts images, text, and files as input and produces text. Its context window reaches 200,000 tokens, larger than 36 % of the models in the registry, and it can write up to 100,000 tokens in one go.

Released more than 1 year ago, it belongs to a generation most vendors have since superseded.

o4 Mini High pricing

On OpenRouter, o4 Mini High costs $1.1 per million input tokens and $4.4 per million output tokens. Counting three tokens read for every token written, its average price is $1.925 per million, more expensive than 70 % of paid models (2.5 times the median of $0.76).

A concrete example: a task that sends 2,000 tokens (about 1,500 words) and receives a 500-token answer costs $0.0044. At 1,000 tasks a day, budget $132 a month. The price calculator redoes this with your own volumes.

Tokens already sent and cached are billed at $0.275 per million.

Performance and benchmarks

Epoch AI does not yet publish a capabilities index for o4 Mini High. We therefore show no made-up performance rating: only price, context and features count towards its score.

Features, privacy and local use

• It supports tool calling, so it can drive an AI agent, call APIs or MCP servers.
• It can answer in an enforced JSON format (structured outputs).
• It is a reasoning model: it "thinks" before answering, which helps on hard tasks but uses more output tokens.
• Its knowledge stops at June 2024.

Its weights are not published: it can only be used through the OpenAI API or a broker such as OpenRouter, which means sending your data off your machines.

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