[GPT-6 Dual New Models Enter the Market at Low Prices, OpenAI Challenges DeepSeek's Pricing Territory with Cost-Effectiveness] Reported by Jinse Finance, on September 23, OpenAI officially launched two models, GPT-6 Sol and GPT-6 Luna. Compared to the previous generation, API prices have been halved. Specifically, Luna is priced at $0.1 per million tokens for input and $0.5 for output, making the cost in standard usage scenarios already lower than DeepSeek V4.1 Flash. Industry analysts point out that although DeepSeek still retains its low-cost advantage for cache hits, its flagship high cost-effectiveness label is facing strong competition from a leading overseas model for the first time. The GPT-6 product matrix has a clear positioning: Astra secures the performance ceiling; Sol is designed for professional reasoning and intelligent agent tasks; Luna focuses on ultra-low costs, catering to large-scale, high-frequency usage scenarios. Benchmark test data shows that GPT-6 Sol outperforms Claude Opus 5 in multiple metrics under lower cost conditions.