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JohnYoung
JohnYoung
September 23, 2026

OpenAI launched GPT-6Sol and GPT-6Luna, small models matching GPT-6Astra's performance in coding, reasoning, and factual accuracy at half the cost. API prices are down 50% from GPT-5.6, with optimized prompt caching boosting efficiency. Sol outperforms Claude Opus5 in automation and agent tasks while cutting costs by up to 60%. Luna rivals flagship models at one-tenth the price. Both feature Astra's improved communication style and are available in ChatGPT Work, Codex, and the API for all user tiers including Plus, Pro, Business, Enterprise, and Edu.

OpenAI launched GPT-6Sol and GPT-6Luna, small models matching GPT-6Astra's performance in coding, reasoning, and factual accuracy at half the cost. API prices are down 50% from GPT-5.6, with optimized prompt caching boosting efficiency. Sol outperforms Claude Opus5 in automation and agent tasks while cutting costs by up to 60%. Luna rivals flagship models at one-tenth the price. Both feature Astra's improved communication style and are available in ChatGPT Work, Codex, and the API for all user tiers including Plus, Pro, Business, Enterprise, and Edu. OpenAI launched GPT-6Sol and GPT-6Luna, small models matching GPT-6Astra's performance in coding, reasoning, and factual accuracy at half the cost. API prices are down 50% from GPT-5.6, with optimized prompt caching boosting efficiency. Sol outperforms Claude Opus5 in automation and agent tasks while cutting costs by up to 60%. Luna rivals flagship models at one-tenth the price. Both feature Astra's improved communication style and are available in ChatGPT Work, Codex, and the API for all user tiers including Plus, Pro, Business, Enterprise, and Edu.
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