Last refreshed 2026-06-29. Next refresh: weekly.
Why use Gemini 3.1 Pro Preview on Vercel AI Gateway?
Vercel AI Gateway offers Gemini 3.1 Pro Preview with pay-as-you-go pricing at $2.00/1M input tokens. Vercel AI Gateway is a unified AI proxy providing a single OpenAI-compatible API endpoint to 275+ models from 25+ providers including Anthropic, OpenAI, Google, Meta, Mistral, DeepSeek, xAI, Alibaba, Amazon, ByteDance, Cohere, MiniMax, MoonshotAI, KwaiPilot, Black Forest Labs, Recraft, Voyage AI, NVIDIA, and more.
Compare Gemini 3.1 Pro Preview across 5 providers to find the best fit for your use caseInput / 1M
$2.00
Output / 1M
$12.00
Cache
read $0.20
Batch
Not sourced
Setup recipe
Python + curlInstall
pip install openaiAuth
export AI_GATEWAY_API_KEY=...Call
import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["AI_GATEWAY_API_KEY"],Model ID
google/gemini-3.1-pro-previewRequest example
import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["AI_GATEWAY_API_KEY"],
base_url="https://ai-gateway.vercel.sh/v1"
)
response = client.chat.completions.create(
model="google/gemini-3.1-pro-preview",
messages=[{"role": "user", "content": "Hello"}]
)
print(response.choices[0].message.content)Gotchas
- Use provider model ID "google/gemini-3.1-pro-preview", not the LLMReference slug "gemini-3.1-pro-preview".
- creator/model-name e.g. kwaipilot/kat-coder-pro-v2
- The examples expect AI_GATEWAY_API_KEY; rename it only if your application config maps the new variable.
Compare Gemini 3.1 Pro Preview Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| Google AI Studio | $2.00 | $12.00 |
| GCP Vertex AI | $2.00 | $12.00 |
| OpenRouter | $2.00 | $12.00 |
| Replicate API | $2.00 | $12.00 |
| Vercel AI Gateway | $2.00 | $12.00 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $2.00 |
| Output tokens | $12.00 |
| Query | $14.00 |
Capabilities
VisionMultimodalJSON / Tool useStructured OutputsCode Execution
About Gemini 3.1 Pro Preview
Google: Gemini 3.1 Pro Preview available via OpenRouter. Pricing: $2/1M input, $12/1M output.
Get Started
Model Specs
Released2026-02-19
Context1m
ArchitectureDecoder Only
Knowledge cutoff2025-01