GPT-5.4 Mini

GPT-5.4 Mini is OpenAI's lightweight variant from the GPT-5.4 series, designed for straightforward tasks with a 400k token context window.

Strengths

Smaller model size makes it faster and more efficient than the full GPT-5.4 while retaining solid general-purpose capabilities across text tasks.

Best for

Applications where speed and efficiency matter more than maximum reasoning depth, or as a cost-conscious tier for handling moderate-complexity workloads.

Limitations

Lacks the advanced reasoning and complex task handling of GPT-5.4 Pro, and does not support image input like GPT-5.4 Image 2; the batch-optimized variant has constraints on real-time usage patterns.