Gemini 3.1 Pro Preview
A refinement of Gemini 3 Pro with improved thinking, better token efficiency and more factually consistent output.
Key Specifications
- Context window
- 1M tokens
- Max output
- 66K tokens
- Knowledge cutoff
- web search available
- Released
- Inputs
- Text, image, video, audio
- Capabilities Show details
- Reasoning Thinks before it answers, always on or as a switchable mode. Function calling Connect to external tools, APIs, and systems. Structured output Return responses in structured formats like JSON. Web search Search the web for up-to-date information. Code execution Write and execute code in a sandboxed environment. File upload Process uploaded documents, spreadsheets, and other files.
Hosted API pricing
| Provider | Input / 1M tokens | Output / 1M tokens | Cached input / 1M | Cost at 10M in + 2M out | |
|---|---|---|---|---|---|
|
Google Cloud
Creator
|
$2.00 | $12.00 | $0.20 | $44.00 | View |
Replicate
|
$2.00 | $12.00 | $44.00 | View |
Heads up: Base-tier, on-demand rates per 1M tokens; cached, batch and long-context tiers excluded. A provider may serve a shorter context or a quantized build than the creator's release. Verify before provisioning. More on how we price.
Similarly priced models
The models nearest Gemini 3.1 Pro Preview by blended rate, each at its own cheapest provider.
| Model | Blended / 1M | Input / 1M | Output / 1M | Context | Cutoff | vs Gemini 3.1 Pro Preview |
|---|---|---|---|---|---|---|
|
Gemini 3.5 Flash
Google Cloud
|
$2.75 | $1.50 | $9.00 | 1M | −25% | |
GPT-4.1
OpenAI
|
$3.00 | $2.00 | $8.00 | 1M | Jun 2024 | −18% |
|
o3
OpenAI
|
$3.00 | $2.00 | $8.00 | 200K | Jun 2024 | −18% |
Claude Sonnet 5
Anthropic
|
$3.3333 | $2.00 | $10.00 | 1M | Jan 2026 | −9% |
|
GPT-5.6 Sol
OpenAI
|
$3.3333 | $2.00 | $10.00 | 1M | Feb 2026 | −9% |
|
Gemini 3.1 Pro Preview
This model
Google Cloud
|
$3.6667 | $2.00 | $12.00 | 1M | Jan 2025 | |
|
GPT-5.6 Terra
OpenAI
|
$3.6667 | $2.00 | $12.00 | 1M | Feb 2026 | 0% |
Kimi K3
Moonshot AI
|
$3.6667 | $2.00 | $12.00 | 1M | 0% | |
Command A
Cohere
|
$3.75 | $2.50 | $10.00 | 256K | +2% | |
|
Command R+ 08-2024
Cohere
|
$3.75 | $2.50 | $10.00 | 128K | Feb 2023 | +2% |
|
GPT-4o
OpenAI
|
$3.75 | $2.50 | $10.00 | 128K | Oct 2023 | +2% |
Prices are USD per 1M tokens at each model's cheapest listed provider. Blended is the cost of 10M input plus 2M output tokens, spread over the 12M.
Frequently Asked Questions
What is Gemini 3.1 Pro Preview good for?
Software engineering and agent workflows that need precise tool use and multi-step execution, refining the Gemini 3 Pro series.
When is Gemini 3.1 Pro Preview not a good fit?
Cost-sensitive, high-volume work: it sits at the top of Google's price range. Closed weights, so no self-hosting, output is text only, and it is still a preview release.
What is the cheapest way to run Gemini 3.1 Pro Preview?
The cheapest hosted rate is $2.00 / $12.00 per 1M tokens via Google Cloud.
How does Gemini 3.1 Pro Preview compare with Gemini 3 Pro Preview?
Google says Gemini 3.1 Pro Preview refines Gemini 3 Pro Preview with better thinking, less token use and more grounded, factually consistent output, tuned for software engineering and agent work that needs precise tool use. Same 1M-token context and text, image, audio and video input. Gemini 3.1 Pro Preview came out 3 months later.
Can I self-host Gemini 3.1 Pro Preview?
No. Google Cloud does not publish the weights; Gemini 3.1 Pro Preview is available only through hosted APIs.
More from Google Cloud
| Model | Context | Input / 1M | Output / 1M |
|---|---|---|---|
|
Gemini 3.5 Flash
|
1M | $1.50 | $9.00 |
|
Gemini 2.5 Pro
|
1M | $1.25 | $10.00 |
|
Gemini 3.6 Flash
|
1M | $0.75 | $3.75 |
|
Gemini 3.7 Flash
|
1M | $0.75 | $3.75 |
|
Gemini 3.8 Flash
|
1M | $0.75 | $3.75 |
|
Gemini 3 Flash Preview
|
1M | $0.50 | $3.00 |
|
Gemini 3.5 Flash-Lite
|
1M | $0.30 | $2.50 |
|
Gemini 2.5 Flash
|
1M | $0.30 | $2.50 |