OpenAI's GPT-6 Luna served in pro reasoning mode for the hardest problems.
Microsoft's compact research model with strong STEM reasoning.
No shared demos for these models yet.
No captured outputs for these models yet.
Both GPT 6 Luna Pro and Phi 4 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.
Phi 4 has a lower blended cost. GPT 6 Luna Pro: $0.10 input / $0.50 output. Phi 4: $0.07 input / $0.14 output.
GPT 6 Luna Pro has a larger context window: GPT 6 Luna Pro supports 1.1M tokens vs Phi 4 at 16K tokens.
GPT 6 Luna Pro supports vision/image input, but Phi 4 does not.
Key differences: only GPT 6 Luna Pro supports vision input; only GPT 6 Luna Pro offers extended reasoning mode. Compare full specs on this page.
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 Phi 4 for free on idapt.app to see which performs better for your specific needs.