Google: Gemini 3.1 Pro
Gemini 3.1 Pro is a leftover Pro sibling on the live Gemini models page, not the 2026 Gemini default. Rechecked 2026-08-18: ai.google.dev/gemini-api/docs/models still lists Gemini 3.1 Pro and now leads new Flash work at Gemini 3.7 Flash. The leftover dedicated card still prints 1,048,576 input / 65,536 output, text plus image / video / audio / PDF in, and a Preview $2 / $12 per 1M token row. That is the leftover 3.1 Pro card, not a replacement for shut-down Gemini 3 Pro Preview.
Compare Gemini 3.7 Flash if you wanted the live Flash path, leftover Gemini 3 Pro if you wanted the shut-down 3 Pro Preview snapshot, and leftover Gemini 3.1 Flash-Lite if you wanted the 3.1 cheap sibling.
Key Features
- Leftover 3.1 Pro sibling: Live docs still print 3.1 Pro. Recheck the models index before you hard-code it as current.
- Not the 2026 Gemini lead: New Flash work starts at Gemini 3.7 Flash.
- Not shut-down 3 Pro Preview: This slug is 3.1 Pro. Gemini 3 Pro is the earlier Preview the index marks shut down.
- Printed leftover card: 1M context, 65k output, multimodal in, text out on the dedicated card we opened.
Use Cases
- People with a Gemini 3.1 Pro bookmark who need the catalog filled.
- People comparing leftover 3.1 Pro vs shut-down 3 Pro Preview vs live 3.7 Flash.
- People who were about to call 3.1 Pro the current Gemini Pro default.
Limitation: The dedicated leftover card still prints a Preview $2 / $12 row. Recheck the live models and pricing pages before you treat that as a 2026 default.
Pricing
First-party pages on 2026-08-18.
| Piece | Price | Notes |
|---|---|---|
| Gemini 3.1 Pro leftover card | Preview $2 / $12 per 1M | Recheck the dedicated card. |
| Live Flash lead | Gemini 3.7 Flash | Gemini 3.7 Flash: $0.75 / $3.75 through 2026-12-31, then $1.50 / $7.50. |
| Earlier 3 Pro leftover | Gemini 3 Pro Preview | Gemini 3 Pro is marked shut down on the models index. |
If a leftover blog still calls 3.1 Pro the current Gemini Pro default, treat the live models page as the correction.
Getting Started
- Open the Gemini models page and note 3.1 Pro as a leftover Pro sibling.
- Recheck Gemini 3.7 Flash if you wanted the live Flash path.
- Recheck leftover Gemini 3 Pro if you wanted the shut-down Preview snapshot.
- Do not paste "current Gemini Pro default" onto 3.1 Pro.
Frequently Asked Questions
Is Gemini 3.1 Pro still latest?
No. Live docs lead new Flash work at Gemini 3.7 Flash.
Same as Gemini 3 Pro Preview?
No. Gemini 3 Pro is the earlier Preview the models index marks shut down.
Same as Gemini 3.1 Flash-Lite?
No. Gemini 3.1 Flash-Lite is the leftover cheap 3.1 sibling.
Alternatives
- Gemini 3.7 Flash: Live Gemini Flash path.
- Gemini 3 Pro: Shut-down earlier 3 Pro Preview snapshot.
- GPT-5.6 Sol: Live OpenAI frontier chat if you wandered here for a current flagship.
Tips
- Call 3.1 Pro a leftover Pro sibling, not the current Gemini default.
- Point new Gemini work at Gemini 3.7 Flash.
- Recheck the leftover dedicated card before you quote $2 / $12.
Conclusion
Gemini 3.1 Pro is a leftover Pro sibling on the live Gemini models page, not the 2026 Gemini default. Start at the Gemini models page, then decide whether Gemini 3.7 Flash already covers the path you need.
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Related Tools
Google: Gemini 3.1 Flash-Lite
ai.google.dev/gemini-api/docs/models
Google Gemini 3.1 Flash-Lite: leftover cheap Flash-Lite sibling on the live models page. Rechecked 2026-08-18.
Google: Gemini 3.5 Flash-Lite
ai.google.dev/gemini-api/docs/models
Google Gemini 3.5 Flash-Lite: leftover cheap Flash-Lite row on the live Gemini models page. Rechecked 2026-08-18.
Google: Gemini 3.6 Flash
ai.google.dev/gemini-api/docs/models
Google Gemini 3.6 Flash: previous-generation Flash after 3.5, before live 3.7 Flash. Rechecked 2026-08-18.
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