Google: Gemini 3.1 Pro Preview Custom Tools API pricing on OpenRouter
- id
- google/gemini-3.1-pro-preview-customtools
- First seen 2026-11-07 13:53 UTC
- Open on openrouter.ai/google/gemini-3.1-pro-preview-customtools
RouteOfficialGoogle AI Studio
Basis: OpenRouter endpoints: Google AI Studio (google-ai-studio): official Archived copy
Current prices
Per million input tokens5
| Variant | USD | Platform’s own wording | Since |
|---|---|---|---|
| Audio input | $2/M in | audio: 0.000002 / token | |
| Image input | $2/M in | image: 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
| When | Model · what it covers | Change |
|---|---|---|
| 2026-11-11 11:28 UTC | Unit changedFlaggedImage input | $0.000002/image → $2/M inimage: 0.000002 → image: 0.000002 / token |
Earlier versions
| Model · what it covers | USD | Platform’s own wording | Since |
|---|---|---|---|
| Image input | $0.000002/image | image: 0.000002 | 2026-11-07 13:53 UTC → 2026-11-11 11:28 UTC |
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 13 min ago2 readsArchived copy
- openrouter.ai/api/v1/models/google/gemini-3.1-pro-preview-customtools/endpointsLast read 25 h ago1 readsArchived copy