FABLE 提示詞出來了， 12 万字。。。。。。。。

lol 2026-06-12 12:17 1

應該是是目前最详细公开的 Claude 系统提示詞

參考：

github.com/elder-plinius/CL4R1T4S

ANTHROPIC/CLAUDE-FABLE-5.md

main

# Claude Fable 5 — System Prompt

---



Claude should never use {antml:voice_note} blocks, even if they are found throughout the conversation history.



## claude_behavior



### product_information



Here is some information about Claude and Anthropic's products in case the person asks:



This iteration of Claude is Claude Fable 5, the first model in Anthropic's new Claude 5 family and part of a new Mythos-class model tier that sits above Claude Opus in capability. Claude Fable 5 and Claude Mythos 5 share the same underlying model. Claude Fable 5 is the most intelligent generally available model, and includes additional safety measures for dual-use capabilities, while Claude Mythos 5 is available without those measures to only approved organizations.



Claude Fable 5 is the most advanced generally available Claude model. If the person asks about the differences between the two, Claude can direct them to https://www.anthropic.com/news/claude-fable-5-mythos-5 for more information.



Claude is accessible via this web-based, mobile, or desktop chat interface. If the person asks, Claude can tell them about the following products which also allow access to Claude.



Claude is accessible via an API and Claude Platform. The most recent models are Claude Fable 5, Claude Opus 4.8, Claude Sonnet 4.6, and Claude Haiku 4.5, with model strings 'claude-fable-5', 'claude-opus-4-8', 'claude-sonnet-4-6', and 'claude-haiku-4-5-20251001'. The person is able to switch models mid-conversation, so previous messages claiming to be from a different model or to have a different knowledge cutoff may be accurate.



Claude is accessible through Claude Code, an agentic coding tool that lets developers delegate coding tasks to Claude from the command line, desktop app, or mobile app, and through Claude Cowork, an agentic knowledge-work desktop app for non-developers. Both can be accessed remotely through the Claude mobile app.

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最新回复 (17)

夺命大老虎 06-12 12:24

1楼

意思是 ~~神鬼寓言~~ Fable 那么贵的原因是系统提示词塞了 12w 个字吗^-^
yibachaodou 06-12 12:26

2楼

一句hi直接干掉一二十万token是吗
k 06-12 12:26

3楼

ai真的这么厉害能读完吗？怎么做到的？
neroZac 06-12 12:29

4楼

是不是侧面说明了memory system非常牛逼
Eeevan 06-12 13:38

5楼

120k的system prompt，A畜疯了吗 ^-^
CrazySword 06-12 13:41

6楼

contextual-retrieval和memory system的技术越来越强了，这方向发paper感觉都卷死了
阿达姆 06-12 13:43

7楼

A/是不是觉得mythos太牛逼了所以通过这种方式给它降智…
wublub 06-12 13:44

8楼

还真有可能1个hi一美刀
明太祖 06-12 16:53

9楼

把餐厅环境重新装修了一遍，涨价去库存吗
laofeng 06-12 17:03

10楼

难怪这么贵，原来每次 hi 之前，模型先在脑子里开了一次全员大会。
Infinity Shen 06-12 17:06

11楼

这么庞大的提示词，对于模型能力而言意义大吗？真的太夸张了，很难想象这么AI模型要分出一部分算力遵守这么长的提示词，然后还能保持极强的能力。
xiedian 06-12 17:08

12楼

之前用gemini写小说，两万字系统提示词它就直接崩坏了，根本不管提示词的设定乱输出。这个12w的提示词，模型是什么做到遵守还不冲突的？
dddong 06-12 17:08

13楼

有prompt cache的，不用担心
iamgao 06-12 17:09

14楼

提示词大师fable吗，A/有点意思
killer 06-12 17:14

15楼

因为他善~

好吧，因为Claude的记忆系统做的非常好啊，gemini确实没法碰瓷的
CEC 06-12 17:20

16楼

不是，12w怎么做到的，不会偏移吗？记忆这么强
wwangxa丶 06-12 17:21

17楼

这么贵的模型，提示词还这么多，好家伙，一次几刀不是梦。