In short
How they differ.
Worked out from the figures below. Prices and specs are the makers' own, read Oct 20, 2026.
- GPT-6 Luna is cheaper per output token: $0.50 against $2.50 per million tokens, so Gemini 3.5 Flash-Lite costs 5 times as much.
- GPT-6 Luna reads more at once: a context window of 1M tokens against 1M.
- No independent board we follow ranks both models yet.
Side by side
The specs.
| Gemini 3.5 Flash-Lite | GPT-6 Luna | |
|---|---|---|
| Made by | Google · US | OpenAI · US |
| Released | Jul 21, 2026 | Sep 22, 2026 |
| Price per 1M tokens | $0.30 in / $2.50 out | $0.10 in / $0.50 out |
| Context window | 1M | 1M |
| Takes in | text, image, video, audio, pdf | text, image |
| Download and run it yourself | No | No |
| Size | Not published | Not published |
| Maker says | “Our fastest, most cost-effective 3.5 model for high-throughput execution.” | “Our most efficient model for focused, high-volume tasks.” |
| Sources | Prices, Oct 20, 2026 · Description | Prices, Oct 20, 2026 · Description |
Independent tests
Where they place.
Position on each board we follow (1 is best). Epoch AI's and Vectara's scores are shown; the other boards are linked for their own figures.
More comparisons