Variants in OpenCode agents

[laerciomonteiro]

We no longer have model options like "antigravity-gemini-3-pro-high"? I tried configuring it here in my OpenCode, but it says the configuration is invalid, even though it worked fine before. I saw that it's only possible to use these variants at the command-line level, and not by directly fixing them in the code, in my OpenCode agents, like "model: google/antigravity-gemini-3.1-pro-high".