ChainCatcher 消息，据 X 用户 synthwavedd 披露，OpenAI 近日完成下一阶段预训练，内部代号为“Bel”，系此前“Doug”的继任模型。该模型总参数量超过 10T，规模与 GPT-4.5 相近，预计经进一步强化学习后，将成为 Astra 及 GPT-6 的基础模型，并有望作为后 GPT-6 时代乃至接近 AGI 门槛模型的底座。
消息称，这一进展令 Anthropic 感到担忧。OpenAI 方面认为 Anthropic 目前尚无足以应对 Astra 公开发布的有效方案；知情人士称这一判断基本属实，主因在于算力受限。Anthropic 正为今年剩余时间可能由 OpenAI 主导做好准备，但预计明年年初有望重新取得领先。
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