Claude Sonnet 4.5 vs GPT 5.6 Luna
High-performance model for real-world agents and coding.
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: Claude Sonnet 4.5 vs GPT 5.6 Luna▼
Which is better, Claude Sonnet 4.5 or GPT 5.6 Luna?
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Both Claude Sonnet 4.5 and GPT 5.6 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.
Which is cheaper, Claude Sonnet 4.5 or GPT 5.6 Luna?
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GPT 5.6 Luna has a lower blended cost. Claude Sonnet 4.5: $3.00 input / $15.00 output. GPT 5.6 Luna: $1.00 input / $6.00 output.
Which has a larger context window, Claude Sonnet 4.5 or GPT 5.6 Luna?
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GPT 5.6 Luna has a larger context window: Claude Sonnet 4.5 supports 1M tokens vs GPT 5.6 Luna at 1.1M tokens.
Do both Claude Sonnet 4.5 and GPT 5.6 Luna support vision?
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Yes, both Claude Sonnet 4.5 and GPT 5.6 Luna support vision/image input.
What are the key differences between Claude Sonnet 4.5 and GPT 5.6 Luna?
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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 Claude Sonnet 4.5 and GPT 5.6 Luna for free on idapt.app to see which performs better for your specific needs.