# OpenAI introduces GPT-6 Sol and GPT-6 Luna at API prices 50% below GPT-5.6 promotional rates

OpenAI says GPT-6 Sol and GPT-6 Luna build on advances behind GPT-6 Astra as faster, more affordable models for work at scale. More efficient caching and inference are reflected in API prices 50% lower than GPT-5.6 promotional pricing.

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Source: OpenAI · Published 9/22/2026, 11:20:51

OpenAI has introduced GPT-6 Sol and GPT-6 Luna. OpenAI says both models build on advances behind GPT-6 Astra, bringing much of GPT-6 Astra’s strengths into faster, more affordable models for work at scale.

OpenAI also says it has made caching and inference more efficient and is passing those savings on in API pricing. API prices for GPT-6 Sol and GPT-6 Luna are 50% lower than GPT-5.6 promotional pricing.

Tags: OpenAI, GPT-6, API pricing

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