OpenAI's GPT-6 Luna served in pro reasoning mode for the hardest problems.
Ultra-fast and lightweight GPT-5 variant for low-latency tasks.
No shared demos for these models yet.
No captured outputs for these models yet.
Both GPT 6 Luna Pro and GPT 5 Nano are capable AI models. The best choice depends on your specific use case: consider pricing, context window, speed, and which capabilities (vision, reasoning, audio) you need.
GPT 5 Nano has a lower blended cost. GPT 6 Luna Pro: $0.10 input / $0.50 output. GPT 5 Nano: $0.05 input / $0.40 output.
GPT 6 Luna Pro has a larger context window: GPT 6 Luna Pro supports 1.1M tokens vs GPT 5 Nano at 400K tokens.
Yes, both GPT 6 Luna Pro and GPT 5 Nano support vision/image input.
GPT 6 Luna Pro and GPT 5 Nano have similar overall capabilities. The main differences lie in pricing, context window size, and provider-specific strengths. Use this comparison page to review all metrics side by side.
If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both GPT 6 Luna Pro and GPT 5 Nano for free on idapt.app to see which performs better for your specific needs.