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OpenAI adds GPT-6 Sol and GPT-6 Luna models to ChatGPT and Codex
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OpenAI introduces two new GPT-6 models, Sol and Luna, expanding the GPT-6 family and reducing API costs by 50 percent.
The new models increase coding and computer-use capabilities while lowering price barriers, enabling broader adoption of advanced AI in everyday development workflows.
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GPT-6 Sol and Luna are now available in ChatGPT Work and Codex for Plus, Pro, Business, Enterprise, and Edu users.
Both models use fewer tokens and cost 50 percent less than their GPT-5.6 counterparts, making sustained AI usage more affordable.
The rollout excludes a GPT-6 Terra model, focusing on three tiers: Terra (small), Sol (large), and Astra (extra large).
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What the cluster adds up to.
The addition of Sol and Luna expands OpenAI’s model tiering, giving developers cheaper options for complex coding tasks and high-volume workloads.
Reduced API pricing lowers the cost of running large-scale AI agents, which can accelerate experimentation and deployment in enterprise environments.
Limited availability, only Plus and higher tiers get Sol, while Free and Go users can only access Luna via the desktop app, means many users must upgrade to benefit fully.
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