o4 Mini High

o4 Mini High is OpenAI's cost-effective reasoning model with extended chain-of-thought applied through a high reasoning_effort setting, supporting multimodal input across a 200k token context.

Strengths

Applies deeper reasoning to problems than standard o4-mini while maintaining lower cost than the frontier o3 model, with multimodal capability across a substantial context window.

Best for

Workloads requiring more sophisticated reasoning than basic inference but where the cost or latency of frontier models is prohibitive, particularly those mixing text and image inputs.

Limitations

Slower and more expensive than o4-mini due to extended reasoning; for the most complex problems or production workloads with strict latency constraints, o3 or purpose-built models may be more suitable.