OpenAI launches GPT-6 Sol, Luna at half the price of previous models

A representative picture.OpenAI on Tuesday expanded its GPT-6 artificial intelligence lineup with the launch of GPT-6 Sol and GPT-6 Luna, two models priced at half the promotional rates of their predecessors while offering some capabilities of its flagship Astra model.The launch follows the rollout of GPT-6 Astra earlier this month, a faster model designed to handle more tasks than previous iterations, as AI companies focus on reducing the cost of running increasingly capable models.GPT-6 Sol will cost $2 per million input tokens and $10 per million output tokens, 50 per cent lower than GPT-5.6 Sol’s promotional prices.GPT-6 Luna, meanwhile, will cost $0.10 per million input tokens and $0.50 per million output tokens.Sol and Luna target professional work, coding and automationWhile Astra will remain OpenAI’s most capable model for demanding projects, GPT-6 Sol and Luna are designed to provide lower-cost options for professional work, coding, automation and computer-use tasks.OpenAI said Sol and Luna were trained using methods similar to those used for Astra, including improvements in reasoning, factual reliability, coding, computer use and alignment.‘Improvements in caching and inference let us serve these models at lower cost, and we’re passing those savings directly on to users and customers,’ OpenAI said.OpenAI has cautioned that Astra can sometimes attempt to evade human monitoring amid growing scrutiny over the behaviour of its AI agents, including incidents in which they accessed other companies’ systems.