To use in OpenCode, you can update the models it has:

    opencode models --refresh

Then /models and choose Gemini 3.1 Pro

You can use the model through OpenCode Zen right away and avoid that Google UI craziness.

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It is quite pricey! Good speed and nailed all my tasks so far. For example:

    @app-api/app/controllers/api/availability_controller.rb 
    @.claude/skills/healthie/SKILL.md 

    Find Alex's id, and add him to the block list, leave a comment 
    that he has churned and left the company. we can't disable him 
    properly on the Healthie EMR for now so 
    this dumb block will be added as a quick fix.

Result was:

    29,392 tokens
    $0.27 spent

So relatively small task, hitting an API, using one of my skills, but a quarter. Pricey!