28 天挑战 Day 1：GPT-6 Astra 与 6.1 Sol 默认提速约 50%
一份每日速报称 GPT-6 Astra 和 GPT-6.1 Sol 默认快了约 50%，OpenAI 还上线了隐形文本水印 TextGrain。
what shipped yesterday? day 1 of tibo’s 28-day challenge - gpt-6 astra + gpt-6.1 sol are now ~50% faster by default - openai shipped textgrain, an invisible text watermark for api customers and eu users rolling out over the coming weeks others: - reflection ai unveiled beam, a 501b open-weight moe with 23b active parameters and a 1m context window, aimed at coding and agentic work - google released nano banana 2.1 in google flow - and some exciting on Gemini 4 argon and RSI for day 2: - openai has just made auto-review free for chatgpt users, letting a second agent automatically check and block high-risk actions without using plan credits day 2 is already looking interesting