GPT-5.4 Nano

A lightweight variant of GPT-5.4 with a 400k token context window, positioned as a smaller, faster alternative within OpenAI's GPT-5.4 series.

Strengths

Maintains GPT-5.4's core capabilities while optimizing for lower latency and reduced resource consumption, making it suitable for high-volume production deployments.

Best for

Applications that need GPT-5.4's reasoning and language understanding but prioritize response speed and throughput over the capabilities of larger variants like GPT-5.4 Pro or GPT-5.5.

Limitations

Smaller model size limits performance on highly complex reasoning tasks compared to GPT-5.4 Pro, GPT-5.5, or other full-scale variants in the lineup.