←Back to NewsAI News/LlmsnewsLlmsApiOpenAI Drops GPT-6 Sol and Luna at 50% Less Than GPT-5.6OpenAI expands its GPT-6 lineup with two cheaper, faster siblings to Astra, cutting API prices in half and pushing prompt caching further.SourceOpenAIPublishedSep 22, 2026, 6:12 PMAuthorAlphaSignal NewsroomRead1 min readOpenAI expands its GPT-6 lineup with two cheaper, faster siblings to Astra, cutting API prices in half and pushing prompt caching further.Reporting is indexed from AlphaSignal. Rights remain with the original publisher and cited sources.Read original report ↗Next readsSpaceXAI · newsxAI Ships Grok 4.7 With Longer Agent Runs at Unchanged PricesOpenAI · newsOpenAI's Astra for Law Pushes Into Big Firms With 54% Research AccuracySakana AI · newsSakana AI's Fugu Max Beats Frontier Models at 60% Lower Cost
