Use Gemini code execution with Gemini 3.8 Flash

by GoogleCode execution

Gemini 3.8 Flash uses Gemini code execution through Opper on the generateContent endpoint, passed through as Google defines it.

UseGemini code executionwithin

Add Gemini code execution to Gemini 3.8 Flash

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-3.8-flash:generateContent" \
2  -H "Authorization: Bearer $OPPER_API_KEY" \
3  -H "Content-Type: application/json" \
4  -d '{"contents": [{"role": "user", "parts": [{"text": "Sum the first 50 primes and show your working."}]}],
5       "tools": [{"codeExecution": {}}]}'

Where you can run it

Gemini 3.8 Flash runs Gemini code execution 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	EU	No	$0.82	$4.13	$0.08	Not offered on this route	Not offered on this route
Google Cloud	EU	No	$0.82	$4.13	$0.08$0.91 write	Not offered on this route
Google Cloud	US	No	$0.75	$3.75	$0.07$0.79 write
Google Cloud	Multi	No	$0.75	$3.75	$0.07	Not offered on this route	Not offered on this route
Google Cloud	Multi	No	$0.75	$3.75	$0.07$0.83 write

The model

Gemini 3.8 Flash

by Google

Gemini 3.8 Flash is Google's workhorse multimodal model for software engineering and agentic tasks, pairing 1M context with image, audio, video, and PDF input.