Gemini 4 Argon 出现在 Antigravity 与 CLI 1.3.3
汇总：Gemini 应用上线低中高三档思考级别、免费用户改走 Auto，Antigravity 与 CLI 1.3.3 出现 Argon 引用，内部还在测代号 Carbon 的 Gemini 4 检查点。
GOOGLE NEWS 🔥: - The Gemini app now offers low, medium and high thinking levels to all users. - Free Gemini users can no longer pick a model and are moved to Auto, which sends most prompts to Flash-Lite. - Google is preparing a new Ultra mode for AI Studio Build, described as "Build with advanced skills and tools". - Gemini 4 Argon references now appear in both Antigravity, with low, medium and high reasoning efforts, and the new Antigravity CLI 1.3.3 build. - Antigravity CLI 1.3.3 is out with a new /plugin command for installing plugins that bundle skills, MCP servers, subagents, rules and hooks. - Google is reportedly testing a Gemini 4 checkpoint called "Carbon" internally, said to perform at Opus 5.5 level on coding.