GPT-5-nano
Lightweight GPT-5: 400K context, minimal latency, adaptive reasoning, cheapest for throughput.
The most lightweight variant of GPT-5 family, designed for high-speed, resource-constrained applications. Maintains impressive capabilities while optimizing for computational efficiency and minimal latency. Supports the same 400K token context window as larger variants. Features adaptive reasoning with multiple effort levels for flexible performance-speed tradeoffs. Approximately 3-5x faster than larger models for simple queries. Approximately 50% the cost of mini variant, making it ideal for cost-sensitive applications. Performs well on straightforward coding and reasoning tasks despite smaller parameter count. Best suited for real-time applications, customer support, and high-throughput scenarios where speed is prioritized.
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