Gemini 2.5 Flash-Lite → GPT-6 Luna: cost per request on six tasks
GPT-6 Luna costs 1–20% more than Gemini 2.5 Flash-Lite per request on six common tasks. It costs no more per result that works if its results work first time at least 2% more often than Gemini 2.5 Flash-Lite's on search re-ranking, and 20% more often on translation.
List prices per million tokens
| Model | Input | Cached input | Output |
|---|---|---|---|
| Gemini 2.5 Flash-Lite | $0.10 | $0.01 | $0.40 |
| GPT-6 Luna | $0.10 | $0.01 | $0.50 |
Prices checked 2026-11-12.
Cost per 1,000 requests
| Task | Gemini 2.5 Flash-Lite | GPT-6 Luna | Change | Cheaper per result that works if it works first time at least |
|---|---|---|---|---|
| Support bot answerInstructions, three help-centre passages and the customer's question in; a short answer out. | $0.42 | $0.45 | 7% more | 8% more often than Gemini 2.5 Flash-Lite |
| Invoice field extractionInstructions and one invoice's text in; about 15 fields as JSON out. | $0.35 | $0.38 | 7% more | 8% more often than Gemini 2.5 Flash-Lite |
| Lead scoringScoring rules and one lead's form answers in; a score and a one-line reason out. | $0.16 | $0.17 | 6% more | 7% more often than Gemini 2.5 Flash-Lite |
| Email reply draftInstructions and the email thread so far in; a reply of about 300 words out. | $0.31 | $0.35 | 13% more | 13% more often than Gemini 2.5 Flash-Lite |
| TranslationInstructions and about 500 words of text in; the same text in another language out. | $0.41 | $0.49 | 20% more | 20% more often than Gemini 2.5 Flash-Lite |
| Search re-rankingA search query and 20 result snippets in; the ids of the best five, in order, out. | $0.42 | $0.42 | 1% more | 2% more often than Gemini 2.5 Flash-Lite |
Token counts are typical sizes, not measurements.
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