OpenAI Cut GPT-6 Prices in Half. The Benchmarks Show What You Give Up.
GPT-6 Sol and Luna: Cheaper, Faster, and Not Always Better
On September 22, 2026, OpenAI released GPT-6 Sol and GPT-6 Luna. Less than a month after GPT-6 Astra, the product line shrank from four tiers (Astra, Sol, Terra, Luna) to three: Astra, Sol, Luna. Terra is gone. Sol's price moved into the former Terra range. Luna's input price fell to $0.10 per million tokens.