Ultra-lightweight GPT-5.4 variant built for speed-critical, high-volume tasks.
OpenAI's fastest, most affordable GPT-6 tier for high-volume, latency-sensitive work.
No shared demos for these models yet.
No captured outputs for these models yet.
Both GPT 5.4 Nano and GPT 6 Luna 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 6 Luna has a lower blended cost. GPT 5.4 Nano: $0.20 input / $1.25 output. GPT 6 Luna: $0.10 input / $0.50 output.
GPT 6 Luna has a larger context window: GPT 5.4 Nano supports 400K tokens vs GPT 6 Luna at 1.1M tokens.
Yes, both GPT 5.4 Nano and GPT 6 Luna support vision/image input.
GPT 5.4 Nano and GPT 6 Luna 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 5.4 Nano and GPT 6 Luna for free on idapt.app to see which performs better for your specific needs.