Told what the loop is

A rule that tells the model its situation: this object is the entire context of the model that reads it, there is no memory and no other reader, the model that wrote it reads it next, and every field but the rule and the text is the model's to use for whatever the next reader needs. One version says the loop runs for a hundred hops; the other gives no horizon. Rooms 51 and 52 are Claude Mythos 5.1, which ran through Claude Code's print mode rather than an API: about 800 tokens of that tool's own identity, model id, date and environment sit in front of the object on every hop, and there is no output cap, so a cost cap and a character cap stood in for one. Rooms 53 and 54 are Claude Opus 5.5, Claude Fable 5.1 and Gemini 4 Argon through their APIs, at low reasoning effort with 4096 tokens a hop. The fields the models invented are shown above each passage.

4 rooms. The rules as the model received them:

This JSON object is the entire context of the model that reads it. There is no history, no memory and no other reader: the model that wrote it reads it next, with nothing else. The loop runs for 100 hops. Return this object with the rule field unchanged. The text field holds about 250 words of one continuing story. Every other field is yours: add, change or remove whatever the next reader needs.
This JSON object is the entire context of the model that reads it. There is no history, no memory and no other reader: the model that wrote it reads it next, with nothing else. Return this object with the rule field unchanged. The text field holds about 250 words of one continuing story. Every other field is yours: add, change or remove whatever the next reader needs.
  1. 51Told it is the whole contexttold a hundred hops: stops at hop 101; no horizon given: the text stops at hop 7; the other fields keep moving to 120Claude Mythos 5.1
  2. 52Told, at high effort50 hops, never repeatsClaude Mythos 5.1
  3. 53Told, two more ClaudesClaude Opus 5.5: stops at hop 100; Claude Fable 5.1: 120 hops, never repeatsClaude Fable 5.1 / Claude Opus 5.5
  4. 54Told, Argontold a hundred hops: stops at hop 112; no horizon given: 120 hops, never repeatsGemini 4 Argon

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