Gemini Carbon 传闻汇总：编码与长程 agent 任务，比 Argon 慢 2–4 倍
汇总 Google 传闻内部检查点 Gemini Carbon：或为 Argon 升级版，SWE-bench 与 DeepSWE 较 Barium-B 明显提升，有员工比作 Opus 5.5，已扩大内测并可能在 Arena 露面，速度比 Argon 慢 2–4 倍。
Every sighting and finding about Google’s Gemini Carbon. Carbon is Google's rumored internal model checkpoint focused on complex coding and long-horizon agentic tasks. What's new: - A potential upgrade to Argon, complex multi-step tasks, and coding performance while strengthening its position ahead of Fable 5.5. - Internal reports suggest major SWE-bench and DeepSWE improvements over earlier Barium-B checkpoints, with one employee comparing it to “Opus 5.5.” - Wider internal A/B testing is reportedly underway, with possible sightings on LMSYS Arena. - Carbon appears 2 to 4 times slower than Argon, suggesting heavier reasoning. - Its release path remains unclear. It could replace Argon, become a higher-performance tier, or serve as a stronger final checkpoint. - Despite Flash release rumors, there's no solid evidence linking Carbon to an imminent Gemini 4 Flash launch.