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深夜突袭，马斯克旗下xAI团队的Grok4 Fast模型迎来重磅升级，其上下文窗口一举突破200万tokens，相当于150万英文单词或6000页文本。
这一数字不仅刷新了行业纪录，更意味着AI模型首次能够一次性处理相当于两部《战争与和平》的全部内容。今天我们就来具体解读一下这背后具体意味着什么？
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早期的GPT-3（4K上下文） 如同一个金鱼脑，只能记住当前的对话片段 -
主流的Claude 3（100K上下文） 像带着一个书包的资料，能处理长篇报告 -
如今的Grok 4（200万上下文） 则相当于推着一整座移动图书馆，可以随时调阅海量信息
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GPT-4 Turbo：12.8万tokens -
Claude 3：20万tokens -
Gemini 1.5 Pro：100万tokens -
Grok 4 Fast：200万tokens
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混合专家架构的极致优化
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注意力机制的重新发明
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统一架构的动态切换
英语报道
Elon Musk's xAI company (Elon Musk) has unveiled a new language model Grok 4 Fast - a cheaper and faster version of Grok 4, released just a few months ago.
According to the developers, the model retains the same accuracy, but uses 40% less computational resources. This means that the cost of queries is reduced by almost 98%.
What is the main feature of Grok 4 Fast
The model is built on a hybrid architecture:
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if the query is complex, it switches to deep analysis mode -
If the query is simple, it switches to fast answers.
This approach is already used by competitors like GPT-5 and Claude Opus, but xAI claims that Grok 4 Fast has managed to make this balance particularly effective.
In tests on the LMArena platform, the model took 1st place in search tasks and was in the top 10 in text response quality.
Technical features
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Context window support up to 2 million tokens (huge volumes of text can be processed) -
Optimisation for fast work with external tools: code execution, web search, connection of additional services -
Training based on reinforcement learning methods, which allows flexible adaptation to users' tasks
The launch of Grok 4 Fast shows that xAI is serious about competing with the giants of the market. While Google is preparing a new version of Gemini and Anthropic has updated Claude Opus to 4.1, Musk is banking on speed and affordability.
After the scandalous Grok 4 failure, the company is clearly trying to regain user trust - and this time it has a chance.
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