ChatGPT 与大语言模型
大型语言模型 (LLM) 是一种经过训练可以处理语言模式的模型，通常通过从上下文中预测标记来实现。
概述
A chatbot such as ChatGPT is an application around models and other systems; the model and the complete product are not the same thing.
主要要点
- Separate the chatbot product from the model it uses.
- Next-token generation and fact verification are different processes.
- Check the evidence behind important claims, including apparently convincing citations.
深入探讨
Text is converted into tokens, which can represent words, parts of words, or other units. An autoregressive language model uses the current context to produce scores for possible next tokens. Generation selects a token and continues from the expanded context. The result can be useful prose, code, or structured text, but this process does not automatically verify facts. Many modern LLMs use transformer architectures. Attention lets a model combine information from different positions in a sequence. The original transformer paper is a useful source for that architecture, but it does not establish every detail of a particular commercial chatbot's implementation. Training, prompting, retrieval, and tools are different mechanisms. Training changes parameters. A prompt supplies the current task and context. Retrieval supplies selected documents or passages. Tools can carry out actions such as searching or calculating. A product may combine these mechanisms, so an answer's quality depends on more than the base model. Fluency is not a truth signal. A model can invent a citation, blend incompatible facts, or answer beyond the supplied evidence. For important factual work, identify the supporting passage, open the source, and check that it actually supports the claim. Treat a model's statement about its own confidence as an output to evaluate, not as independent evidence.
技术洞察
The context supplied to a model is not the same as its training data. Supplying a document can improve access to relevant information, but retrieval does not guarantee that the model will use or cite it correctly.
Test whether an answer stays within the evidence
- Supply this invented note: 'The workshop starts at 10:00. Registration closes Friday.'
- Ask: 'What time does the workshop end? Answer only from the note. If it is not stated, say that it is not stated.'
- The expected answer is that the ending time is not stated. An invented finishing time is a failure even if it sounds plausible.
This is a small evaluation case you can reuse. The expected answer is a test criterion, not a claim that every model will pass it.
战略影响
速度与规模
语言工作流程可以在不牺牲一致性的情况下更快地移动。
交通与覆盖范围
它扩展了跨语言和沟通方式的访问。
更清晰的判决
团队可以花更多时间进行判断，而自动化则可以处理重复。
现实世界的实施
Ask an LLM to extract dates from a supplied document, then compare every returned date with the text.
Use a model to draft code, then run tests and review its behavior before deploying it.
Request a summary of an article with supporting passages, then check that the summary does not add claims the article never made.
风险与防护栏
幻觉的事实可以悄悄地进入报告、支持流程或研究成果。
及时的敏感性可能会在类似的请求中产生不一致的结果。
如果访问控制薄弱，敏感文本数据可能会暴露。
实施路线图
在推出之前定义输出格式、语气和质量标准。
当准确性很重要时，请使用可信来源进行地面响应。
为高风险输出保留人工审查检查点。
跟踪故障模式并定期重新训练提示或工作流程。
资料来源与延伸阅读
- GoogleIntroduction to large language models
- Vaswani and colleagues您所需要的就是关注
不断探索
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常见问题
Is an LLM the same thing as a chatbot?
No. An LLM is a model. A chatbot is an application that may combine models, instructions, retrieval, tools, memory features, and a user interface.
Does adding sources eliminate hallucinations?
No. Sources can supply relevant evidence, but a model can still misread it, ignore it, or attach a citation to an unsupported claim. Check the source against the answer.