No, there are multiple level of Gemini and with bard there is only free version.

If you want to generate images then use bing, here i generated just now:

https://www.bing.com/images/create/iron-man-vs-captain-america-and-thor-on-battle/1-6572e38a96474bb4a8c10018c360f214?id=KJ%2bOQ99NGB43%2f0jRu%2f78aQ%3d%3d&view=detailv2&idpp=genimg&idpclose=1&FORM=SYDBIC