GPT-6 Luna vs Gemini 3.8 Flash price
Input, output, cached and batch prices, every route and a month of tokens, side by side.
GPT-6 Luna
Gemini 3.8 FlashA month of tokens
100M input and 20M output tokens, list price. Use your own numbers.
Side by side
| GPT-6 Luna | Gemini 3.8 Flash | |
|---|---|---|
| Input per 1M | $0.1 | $0.75 |
| Output per 1M | $0.5 | $3.75 |
| Cached input | $0.01 | $0.075 |
| Batch in / out | $0.05 / $0.25 | $0.375 / $1.88 |
| Blended (3:1) | $0.2 | $1.5 |
| Context | 1.05M | 1M |
| Routes | 7 | 6 |
| Released | Sep 22, 2026 | Sep 2, 2026 |
| Leadersboard score | n/a | 15 (#13) |
On the price map
Size: context window, 8K to 2MEqual blended cost (3:1) 245 models, lower left is cheaper
Every route
GPT-6 Luna
| Way to buy | Input | Output | In / out per 1M | Cached | Vs list |
|---|---|---|---|---|---|
| OpenAI flex, cheapest · cached $0.005 | $0.05 | $0.25 | $0.05 / $0.25-50% vs list | $0.005 | -50% vs list |
| OpenAI API The lab's own API · cached $0.01 | $0.1 | $0.5 | $0.1 / $0.5List price | $0.01 | List price |
 Azure AI FoundryDefault region · cached $0.01 | $0.1 | $0.5 | $0.1 / $0.5Same as list | $0.01 | Same as list |
 AWS Bedrockus-east-1 · cached $0.011 | $0.11 | $0.55 | $0.11 / $0.55+10% vs list | $0.011 | +10% vs list |
| Azure AI Foundry eu · cached $0.011 | $0.11 | $0.55 | $0.11 / $0.55+10% vs list | $0.011 | +10% vs list |
| Azure AI Foundry us · cached $0.011 | $0.11 | $0.55 | $0.11 / $0.55+10% vs list | $0.011 | +10% vs list |
| OpenAI fast · cached $0.02 | $0.2 | $1 | $0.2 / $1+100% vs list | $0.02 | +100% vs list |
Gemini 3.8 Flash
| Way to buy | Input | Output | In / out per 1M | Cached | Vs list |
|---|---|---|---|---|---|
 Google Vertex AIglobal-flex, cheapest · cached $0.037 | $0.375 | $1.88 | $0.375 / $1.88-50% vs list | $0.037 | -50% vs list |
| Google Gemini API flex · cached $0.037 | $0.375 | $1.88 | $0.375 / $1.88-50% vs list | $0.037 | -50% vs list |
| Google Gemini API API The lab's own API · cached $0.075 | $0.75 | $3.75 | $0.75 / $3.75List price | $0.075 | List price |
| Google Vertex AI global · cached $0.075 | $0.75 | $3.75 | $0.75 / $3.75Same as list | $0.075 | Same as list |
| Google Vertex AI global-priority · cached $0.135 | $1.35 | $6.75 | $1.35 / $6.75+80% vs list | $0.135 | +80% vs list |
| Google Gemini API priority · cached $0.135 | $1.35 | $6.75 | $1.35 / $6.75+80% vs list | $0.135 | +80% vs list |
Sources: OpenRouter's public model catalog and each provider's own pricing page, read every morning at 05:00 UTC; gateway fees re-read every Monday. List prices: your contract may differ. Logos via logo.dev; trademarks belong to their owners.