GPT 5.6 Luna vs Claude Sonnet 4
OpenAI's fastest, most affordable GPT-5.6 tier for high-volume, latency-sensitive work.
Significantly enhanced over Sonnet 3.7 in coding and reasoning tasks.
No captured outputs for these models yet.
Frequently Asked Questions: GPT 5.6 Luna vs Claude Sonnet 4▼
Which is better, GPT 5.6 Luna or Claude Sonnet 4?
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Both GPT 5.6 Luna and Claude Sonnet 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 Claude Sonnet 4?
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GPT 5.6 Luna has a lower blended cost. GPT 5.6 Luna: $1.00 input / $6.00 output. Claude Sonnet 4: $3.00 input / $15.00 output.
Which has a larger context window, GPT 5.6 Luna or Claude Sonnet 4?
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GPT 5.6 Luna has a larger context window: GPT 5.6 Luna supports 1.1M tokens vs Claude Sonnet 4 at 1M tokens.
Do both GPT 5.6 Luna and Claude Sonnet 4 support vision?
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Yes, both GPT 5.6 Luna and Claude Sonnet 4 support vision/image input.
What are the key differences between GPT 5.6 Luna and Claude Sonnet 4?
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Key differences: GPT 5.6 Luna is significantly cheaper. 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 Claude Sonnet 4 for free on idapt.app to see which performs better for your specific needs.