Use Gemini URL context with Gemini 3.1 Pro Preview

by GoogleWeb fetch

Gemini 3.1 Pro Preview uses Gemini URL context through Opper on the generateContent endpoint, passed through as Google defines it.

UseGemini URL contextwithin

Add Gemini URL context to Gemini 3.1 Pro Preview

Set up with agents

Paste this into your coding agent (Claude Code, Cursor, Codex, and more) and it will set up and build with Opper for you.

Get your API key

In your code

1curl "https://api.opper.ai/v3/compat/v1beta/models/gemini/gemini-3.1-pro-preview:generateContent" \
2  -H "Authorization: Bearer $OPPER_API_KEY" \
3  -H "Content-Type: application/json" \
4  -d '{"contents": [{"role": "user", "parts": [{"text": "Summarise https://opper.ai/pricing"}]}],
5       "tools": [{"urlContext": {}}]}'

Where you can run it

Gemini 3.1 Pro Preview runs Gemini URL context on the routes below. Some routes also sell flex and priority processing: the same model at another price, picked per request with service_tier. How service tiers work.

Provider	Region	Training	Input	Output	Cache read
Google Cloud	US	No	$2.00	$12.00	$0.20$2.38 write
Google Cloud	Multi	No	$2.00	$12.00	$0.20	Not offered on this route	Not offered on this route
Google Cloud	Multi	No	$2.00	$12.00	$0.20$2.38 write

The model

Gemini 3.1 Pro Preview

by Google

Gemini 3.1 Pro Preview by Google, a frontier reasoning LLM with 1M context and strong agentic coding, scoring 77% on ARC-AGI-2 and 81% on SWE-Bench Verified.

Available on

Google CloudUS

Pricing from$2.00/ 1M input$12.00/ 1M output$0.20/ 1M cache read1Mcontext

Privacy

ZDR
Training: No
Region: US, Multi

Use Gemini URL context with other models

Step-by-step setup for Gemini URL context on each of these models through Opper.

Gemini 4 Argon Gemini 3.8 Flash Gemini 3.7 Flash Gemini 3.6 Flash Gemini 3.5 Flash-Lite Gemini 3.5 Flash Gemini 2.5 Pro See all 700+ models

More tools on Opper

Jina Reader

Turn any URL into clean markdown a model can read. Opper's web fetch, running in the EU.

Read/v3/tools/web/fetch

Claude web fetch

Claude fetches and reads pages itself on the Messages endpoint, on Anthropic's own route.

Readweb_fetch

Jina search

Opper's default search engine for models without their own. Search processing stays in the EU.

Search"engine": "jina"