Google: Nano Banana 2 (Gemini 3.1 Flash Image) API pricing on OpenRouter
- id
- google/gemini-3.1-flash-image
- First seen 2026-11-07 13:53 UTC
- Open on openrouter.ai/google/gemini-3.1-flash-image
Current prices
Per million input tokens1
| Variant | USD | Platform’s own wording | Since |
|---|---|---|---|
| Standard | $0.5/M in | prompt: 0.0000005 / token |
Per million output tokens5
| Variant | USD | Platform’s own wording | Since |
|---|---|---|---|
| Standard | $3/M out | completion: 0.000003 / token | |
| via Google AI Studio | $60/M out | output_image: 0.00006 USD / token | |
| via Google Vertex | $60/M out | output_image: 0.00006 USD / token | |
| Standard | $60/M out | image_output: 0.00006 / token | |
| via Google Vertex | $66/M out | output_image: 0.000066 USD / token |
Per run (default parameters)1
| Variant | USD | Platform’s own wording | Since |
|---|---|---|---|
| Web search | $0.014/run | web_search: 0.014 |
Change log
No changes yet. A platform’s first run sets the baseline; changes appear from the next one.
Earlier versions
No earlier versions: these prices haven’t changed since we started collecting.
Where these prices come from
Read from the platform’s public pages and APIs. Every read is archived, so any price here can be checked against what the platform showed at the time.
- openrouter.ai/api/v1/images/models/google/gemini-3.1-flash-image/endpointsLast read 28 h ago1 readsArchived copy
- openrouter.ai/api/v1/modelsLast read 28 h ago1 readsArchived copy