OpenAI: GPT-6.1 Sol vs OpenAI: GPT-6 Luna

For a sample job of 1 million input tokens and 250,000 output tokens, GPT-6 Luna costs $0.23 and GPT-6.1 Sol costs $4.50, so GPT-6 Luna is about 20.0 times cheaper for the same work.

Both read up to 1,050,000 tokens at once, roughly 1,575 pages of text.

On our blended benchmark score GPT-6.1 Sol leads 89.2 to 62.2.

Across the 20 tasks where they differ, GPT-6.1 Sol scores higher on 14 (SQL Generation, Code Review, Code Refactoring and others), GPT-6 Luna on 6 (Code Completion, Code Documentation, CSV / Spreadsheet Cleanup and others).

Pick GPT-6.1 Sol if you need benchmark performance or the stronger all-round task scores; pick GPT-6 Luna if you need lower cost.

Costs use current list prices per million tokens; page counts assume about 0.75 words per token and 500 words per page.