I don't see it on the API price list:
https://ai.google.dev/gemini-api/docs/pricing
I can imagine that it's not so interesting to most of us until we can try it with cursor.
I look forward to doing so when it's out. That Aider bench mixed with the speed and a long context window that their other models are known for could be a great mix. But we'll have to wait and see.
More generally, it woud be nice for these kinds of releases to also add speed and context window as a separate benchmark. Or somehow include it in the score. A model that is 90% as good as the best but 10x faster is quite a bit more useful.
These might be hard to mix to an overall score but they're critical for understanding usefulness.