Google: Gemini 3.1 Pro Preview API pricing on OpenRouter
- id
- google/gemini-3.1-pro-preview
- First seen 2026-11-07 13:53 UTC
- Open on openrouter.ai/google/gemini-3.1-pro-preview
Current prices
Per image1
| Variant | USD | Platform’s own wording | Since |
|---|---|---|---|
| Image input | $0.000002/image | image: 0.000002 |
Per million input tokens4
| Variant | USD | Platform’s own wording | Since |
|---|---|---|---|
| Audio input | $2/M in | audio: 0.000002 / token | |
| Standard | $2/M in | prompt: 0.000002 / token | |
| Prompt > 200KAudio input | $4/M in | audio: 0.000004 / token (>200000) | |
| Prompt > 200K | $4/M in | prompt: 0.000004 / token (>200000) |
Per million output tokens3
| Variant | USD | Platform’s own wording | Since |
|---|---|---|---|
| Standard | $12/M out | completion: 0.000012 / token | |
| Reasoning | $12/M out | internal_reasoning: 0.000012 / token | |
| Prompt > 200K | $18/M out | completion: 0.000018 / token (>200000) |
Per million cached input tokens (read)4
| Variant | USD | Platform’s own wording | Since |
|---|---|---|---|
| Standard | $0.2/M cache read | input_audio_cache: 0.0000002 / token | |
| Standard | $0.2/M cache read | input_cache_read: 0.0000002 / token | |
| Prompt > 200K | $0.4/M cache read | input_audio_cache: 0.0000004 / token (>200000) | |
| Prompt > 200K | $0.4/M cache read | input_cache_read: 0.0000004 / token (>200000) |
Per million cache-write tokens1
| Variant | USD | Platform’s own wording | Since |
|---|---|---|---|
| 5-min cache | $0.375/M cache write | input_cache_write: 0.000000375 / 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/modelsLast read 28 h ago1 readsArchived copy