Use gemini 1.5 pro with API key?

Is it currently possible to use gemini 1.5 pro with my own api key?

The new version can fix bugs that Sonnet can’t, would be a great addition on top of Sonnet (20k context fine for me)

Please add it to long context chat as well. It seems to be cheaper than gpt-4o or sonnet. Possibly something like 128-200k context.