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OpenAI has expanded its GPT-6 family with Sol and Luna, offering significant cost reductions of up to 96% compared to competitors like Claude Fable 5 while maintaining strong performance on coding and agent benchmarks. These API-only models utilize improved inference techniques to make advanced capabilities accessible for high-volume tasks without the need for self-hosting weights. The release signals a strategic shift toward democratizing access to top-tier reasoning through aggressive pricing rather than solely relying on flagship model upgrades.
Sources coveringMarkTechPost, Latent Space, LessWrong, arXiv
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OpenAI Releases GPT-6 Sol and Luna: 50% Cheaper API Pricing and Benchmarks

MarkTechPost4 min read

OpenAI has released GPT-6 Sol and GPT-6 Luna, 2 lower-cost models trained with methods similar to GPT-6 Astra. Sol costs $2/$10 and Luna $0.10/$0.50 per 1M tokens. Both are available now in the API, ChatGPT Work and Codex. They come with improved prompt caching for long-running agents. The post OpenAI Releases GPT-6 Sol and Luna: 50% Cheaper API Pricing and Benchmarks appeared first on MarkTechPost.

OpenAI has released GPT-6 Sol and GPT-6 Luna, 2 new models in its GPT-6 family. They sit below GPT-6 Astra, which launched earlier this month. OpenAI trained both with methods similar to Astra’s. The aim is to bring Astra’s advances to faster, more affordable models. Deployable today? Yes. Both models are live in the OpenAI API as gpt-6-sol and gpt-6-luna. They are API-only models, so there are no weights to…

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