Anthropic於9月23日發佈Claude5.5系列首款模型Opus5.5，官方稱多數任務表現與Fable5.1相當，典型任務成本較上代Opus5降低40%，輸出速度提升超30%，已上線Claude及亞馬遜雲、谷歌雲、微軟Azure。9項測試中7項領先Fable5.1、Opus5及GPT-6 Astra、GPT-5.6 Sol，三項編程測試均獲最高分。
9月22日，小米發佈新一代大模型MiMo-V2.6，推出Pro和Flash兩個原生全模態版本。Pro版在Artificial Analysis綜合智能指數上拿到46分，超越Kimi K3和Qwen3.8Max，成爲當前最強開源模型；但小米坦言，與Claude Fable5.1、GPT-6Astra等頂級閉源模型仍有差距。
Andon Labs的Vending-Bench2測試中，AI以500美元模擬經營售貨機一年。GPT-6 Astra平均賬戶餘額達15515美元首次登頂，最差一輪也超過Claude Fable5.1最佳表現。差距不僅在於盈利，更在策略：Astra持續壓低採購價，一度砍至原價約48%。
Andon Labs的Vending-Bench2測試中，AI代理用500美元模擬經營自動售貨機一年。GPT-6Astra平均餘額達15515美元，最差一輪也超Claude Fable5.1最好成績，首次登頂，優勢體現在供應鏈管理和規則執行力。
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