OpenAI has launched updated versions of its Sol and Luna models, offering API access at half the cost of the previous generation while targeting improved efficiency and accuracy.
Key facts
- •GPT-6 Sol and Luna are priced at 50% of the cost of the previous GPT-5.6 generation.
- •OpenAI introduced a 90% discount for cached input tokens to further reduce developer costs.
- •Sol is designed for complex coding and data tasks, while Luna targets high-volume clerical work.
- •The models are available in ChatGPT Work, Codex, and the API, with a gradual rollout to other platforms.
- •OpenAI claims GPT-6 Sol makes approximately half as many mistakes as its predecessor.
OpenAI has expanded its GPT-6 model generation with updated versions of its Sol and Luna models. These models are designed to provide more efficient and affordable options for developers and users, following the recent release of the flagship GPT-6 Astra. The company stated that the new models offer improved factual accuracy and lower error rates in coding tasks compared to their predecessors.
By the numbers
Pricing and Efficiency Improvements
The updated GPT-6 Sol and Luna models are available at 50% of the cost of the GPT-5.6 series. OpenAI attributes these price reductions to advancements in caching and inference technology. Specifically, GPT-6 Sol is priced at $2 per million input tokens and $10 per million output tokens, while Luna is priced at $0.10 per million input tokens and $0.50 per million output tokens. Additionally, OpenAI introduced a 90% discount on cached input tokens, supported by a new dashboard and diagnostic tools for developers.
Model Capabilities and Availability
Sol is intended for complex tasks such as coding, debugging, and data analysis, while Luna is optimized for high-volume, well-defined tasks like document summarization and information extraction. OpenAI claims these models outperform Anthropic’s Opus and Fable models in specific benchmarks, including AutomationBench. The models are currently available in ChatGPT Work, Codex, and the ChatGPT API, with Luna also accessible to Free and Go users via the desktop application.
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This article was independently rewritten by ManyPress editorial AI from reporting originally published by TechCrunch, The Decoder.
