OpenAI launched its smallest and cheapest GPT-5.4 variants, designed for the "subagent era."
GPT-5.4 Mini runs 2x faster than GPT-5 Mini and approaches full GPT-5.4 performance on several benchmarks, making it ideal for production workloads that need both speed and capability.
GPT-5.4 Nano costs just $0.20 per million input tokens, targeting classification, data extraction, and coding subagent tasks. At this price point, it's one of the most cost-effective frontier-adjacent models available.
Check our cost calculator for updated monthly projections with these new models.