Model comparison

GPT-6 Luna vs GPT-6 Sol

Compare pricing, context windows and capabilities from OpenRouter. Open either model’s page to check availability and try it online.

openaiGPT-6 Lunanewopenai/gpt-6-lunaopenaiGPT-6 Solnewopenai/gpt-6-sol

Input price /M$0.0520× cheaper$1.00

Output price /M$0.2520× cheaper$5.00

Cache read /M$0.005020× cheaper$0.10

Context window1.1M1.1M

Catalog date22 Sept 202622 Sept 2026

What the same turn costs

Estimates from published token rates — stated token counts, not measurements.

Quick answer2K tokens in, 600 outGPT-6 Luna$0.000320× cheaperGPT-6 Sol$0.0050

10-slide deck build60K tokens in, 9K outGPT-6 Luna$0.005220× cheaperGPT-6 Sol$0.105

150-page PDF read200K tokens in, 4K outGPT-6 Luna$0.01120× cheaperGPT-6 Sol$0.22

Capabilities

Bothtool-usevisionreasoning

GPT-6 Luna: file, image, text → text · GPT-6 Sol: file, image, text → text

Which model should you use?

Start with the token cost for your workload, the context you need, and supported input types. A lower price or larger context window does not establish better answer quality.

To compare answers, open each model in a separate chat and use the same prompt. Token tables use published specs and estimates; any measured AA results above are a separate benchmark.

Try GPT-6 Luna — pricing and availability Try GPT-6 Sol — pricing and availability