Chat Models
OpenAI
GPT-5 Nano
Fastest, lowest-cost GPT-5 variant for simple, high-volume tasks.
FastHigh volume
Same provider
More from OpenAI
OpenAI
GPT-5.6 Sol
Flagship GPT-5.6 for the hardest reasoning, coding, and agentic tasks.
OpenAI
GPT-5.6 Terra
Balanced GPT-5.6 with GPT-5.5-level quality at lower cost for everyday work.
OpenAI
GPT-5.6 Luna
Fastest, lowest-cost GPT-5.6 for simple, high-volume, or latency-sensitive tasks.
OpenAI
GPT-5.5
Frontier model for complex professional work and coding with 1M+ context.