Google: Gemini 3.1 Pro Preview
The Google Gemini 3.1 Pro Preview is an AI model that supports multiple input modalities, including text, audio, file, image, and video inputs, with a maximum context length of 1048576 tokens. It also allows for structured output through tools and reasoning capabilities. For those looking to invest in a high-end model, the Gemini 3.1 Pro Preview may be worth considering. Its price point of $2.0 per million input tokens and $12.0 per million output tokens is relatively steep, but its benchmark scores suggest it delivers strong performance across multiple tasks, with a blended score of 67.8 across four independent benchmarks. Its broad input modality support also makes it a versatile choice for developers who need to integrate AI capabilities across various data types.
Benchmark results
Independent, published benchmarks. Blended score 67.8 across 4 benchmarks, last refreshed 2026-09-07. How scoring works →
| Benchmark | Measures | Score |
|---|---|---|
| AI Index | broad capability composite | 60.5 |
| AI Index Coding | software engineering tasks | 100.0 |
| AI Index Agentic | multi-step tool-using tasks | 17.1 |
| EQ-Bench | emotional understanding in dialogue | 74.3 |
- Model ID
- google/gemini-3.1-pro-preview
- Vendor
- Released
- February 2026
- Tokenizer
- Gemini
- Input Modalities
- audio, file, image, text, video
- Output Modalities
- text
- Max Output
- 65,536 tokens
- Tool Calling
- ✓ supported
- Structured Output
- ✓ supported
- Reasoning Mode
- ✓ supported
- Vision
- ✓ accepts images
- Audio
- ✓ accepts audio
- Moderated
- no
What it costs in practice
Computed from the current $2.00/M input and $12.00/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | $0.08 |
| Classify 1,000 customer emails | 500k in / 50k out | $1.60 |
| A month of a busy support chatbot | 5M in / 2M out | $34.00 |
Strong choice for
Category rankings
Where Google: Gemini 3.1 Pro Preview places across the 30 categories it ranks in. How we rank →
| # | Category | Score |
|---|---|---|
| #2 | Audio SummarizationVoice · of 25 ranked | 159 |
| #2 | Video SummarizationVideo · of 25 ranked | 159 |
| #12 | CSV / Spreadsheet CleanupData · of 25 ranked | 155 |
| #12 | Meeting NotesBusiness · of 25 ranked | 152 |
| #13 | Transcript CleanupWriting · of 25 ranked | 143 |
| #13 | Long-Context Q&AAgents · of 25 ranked | 156 |
| #14 | Code RefactoringCode · of 25 ranked | 165 |
| #14 | Code DocumentationCode · of 25 ranked | 143 |
| #14 | Long-Document SummarizationWriting · of 25 ranked | 161 |
| #14 | RAG PipelinesAgents · of 25 ranked | 165 |
| #15 | RFP ResponseBusiness · of 25 ranked | 174 |
| #16 | OCR / Document ParsingData · of 25 ranked | 146 |
| #16 | Table Extraction from PDFsData · of 25 ranked | 146 |
| #17 | Legal ResearchProfessional · of 25 ranked | 167 |
| #17 | Scientific ResearchProfessional · of 25 ranked | 167 |
| #17 | Fiction CollaboratorPersonal · of 25 ranked | 167 |
| #17 | Literature ReviewResearch · of 25 ranked | 167 |
| #18 | History TutoringEducation · of 25 ranked | 144 |
| #20 | ETL ScriptingData · of 25 ranked | 154 |
| #20 | Medical Note SummarizationProfessional · of 25 ranked | 154 |
| #21 | Contract ReviewProfessional · of 25 ranked | 176 |
| #21 | Character RoleplayPersonal · of 25 ranked | 149 |
| #24 | Creative WritingWriting · of 25 ranked | 155 |
| #24 | Screenwriting & DialogWriting · of 25 ranked | 155 |
| #24 | Academic WritingWriting · of 25 ranked | 155 |
| #24 | Legal DraftingProfessional · of 25 ranked | 155 |
| #24 | OKRs & Strategic PlanningBusiness · of 25 ranked | 155 |
| #24 | Math ProofsResearch · of 25 ranked | 155 |
| #25 | Code ReviewCode · of 25 ranked | 165 |
| #25 | Essay GradingEducation · of 25 ranked | 165 |
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Quick answers
- How much does Google: Gemini 3.1 Pro Preview cost?
- $2.00 per million input tokens and $12.00 per million output tokens.
- What is Google: Gemini 3.1 Pro Preview's context window?
- 1,048,576 tokens, roughly 1,572 pages of text in a single request.
- Does Google: Gemini 3.1 Pro Preview support tool calling?
- It supports tool calling, structured output, a reasoning mode.
- Can Google: Gemini 3.1 Pro Preview process images?
- Yes, it accepts image input.