GPT 5.6 Luna vs Phi 4
OpenAI's fastest, most affordable GPT-5.6 tier for high-volume, latency-sensitive work.
No captured outputs for these models yet.
Frequently Asked Questions: GPT 5.6 Luna vs Phi 4▼
Which is better, GPT 5.6 Luna or Phi 4?
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Both GPT 5.6 Luna 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.
Which is cheaper, GPT 5.6 Luna or Phi 4?
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Phi 4 has a lower blended cost. GPT 5.6 Luna: $1.00 input / $6.00 output. Phi 4: $0.07 input / $0.14 output.
Which has a larger context window, GPT 5.6 Luna or Phi 4?
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GPT 5.6 Luna has a larger context window: GPT 5.6 Luna supports 1.1M tokens vs Phi 4 at 16K tokens.
Do both GPT 5.6 Luna and Phi 4 support vision?
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GPT 5.6 Luna supports vision/image input, but Phi 4 does not.
What are the key differences between GPT 5.6 Luna and Phi 4?
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Key differences: Phi 4 is significantly cheaper; only GPT 5.6 Luna supports vision input; only GPT 5.6 Luna offers extended reasoning mode. Compare full specs on this page.
Which model should I choose for my use case?
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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 5.6 Luna and Phi 4 for free on idapt.app to see which performs better for your specific needs.