@testingcatalog 在 Grok 网页发现 "Unlock the full power of Chat with Grok 4.5" 踪迹，预示 Grok 4.5 即将上线。多方确认，Grok 4.5 基于 xAI 的 V9 基础模型，拥有 1.5T 参数，约为当前生产模型 V8-small 的 3 倍。V9 预训练于 2026 年 5 月 26 日完成，之后通过补充训练加入 Cursor 编码数据，强化学习仍在进行中。xAI 计划到 2026 年底每月发布从头训练的新模型。当前公开 API 模型仍为 Amazon Bedrock 上的 Grok 4.3。
Grok 4.5 almost ready to drop?
Some details about Grok 4.5 that have now been confirmed by various reports.
- Grok 4.5 is built on xAI’s V9 foundation model with 1.5T parameters.
- That makes it about 3x larger than v8-small, which currently serves production traffic on X.
- V9 pre-training was completed on May 26, 2026.
- Cursor coding data was added after pre-training through supplemental training.
- Reinforcement learning is still ongoing.
- xAI is planning monthly new-model releases trained from scratch through the end of 2026.
- Grok 4.3 remains the current public API model on Amazon Bedrock.
BREAKING 🔥: TRACES OF GROK 4.5 HAVE BEEN SPOTTED ON THE GROK WEB! > Unlock the full power of Chat with Grok 4.5 SOON 👀在 X 查看被引用的帖子
来源：Rohan Paul · x.com