OpenAI adds GPT-6 Sol and Luna at half price

OpenAI expanded the GPT-6 family with GPT-6 Sol and GPT-6 Luna, trained with similar methods to GPT-6 Astra to bring that generation’s advances to faster, more affordable models. API prices for both drop 50% compared with their GPT-5.6 promotional pricing.

What’s actually new

• New pricing. GPT-6 Sol drops to $2 input / $10 output per million tokens (from $4 / $20), and Luna to $0.10 / $0.50 (from $0.20 / $1.20).
• A step up in real work. On AutomationBench, GPT-6 Sol at xhigh outperforms Claude Opus 5 at max effort at 9% of its cost per task, and on Agents’ Last Exam it beats Opus 5’s top score at 60% lower cost. GPT-6 Luna matches GPT-5.6 Sol on factuality at higher effort at about a hundredth of its cost.
• Astra’s communication style. More clarity, less jargon, shorter answers without losing substance, especially noticeable in technical and coding conversations.

Why it matters

GPT-6 Sol and Luna make frontier-class intelligence practical for everyday work and large-scale applications. They are live today in ChatGPT Work and Codex for all paid plans, with Luna open to free and Go users in the desktop app, and available in the API as gpt-6-sol and gpt-6-luna. The gap between flagship and affordable models just narrowed considerably.

(Original source: OpenAI)