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GPT-6 Sol and Luna cut listed prices versus their GPT-5.6 counterparts

simonwillison.net 6 min read Editor score 7/10

The excerpt lists GPT-6 Luna at half the input and output prices of GPT-5.6 Luna, with a similar reduction for Sol, and compares several models’ token rates. Those prices can change model selection and the economics of production workloads.

What

OpenAI released GPT-6 Sol and Luna, with listed input and output prices below their GPT-5.6 equivalents.

How

GPT-6 Luna is listed at $0.10/$0.50 per million input/output tokens; GPT-6 Sol is listed at $2/$10.

Why it matters

Lower token prices can change model-selection economics for engineers, especially in applications with heavy inference usage.

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