Update README.md

README.md

@@ -7,7 +7,7 @@ tags:
   - k5
 ---
 
-# littlelearner-5b-bounded-sft-chatty
+# littlelearner-5b-chatty
 
 5B K-5-bounded chat model with general chat, model identity, and format steerability installed by a behavior SFT on the blend base (chatty v2).
 
@@ -20,6 +20,14 @@ Part of the **LittleLearner** scale-up study (*pedagogically-controlled knowledg
 - **Pretraining:** 88B tokens on K-5 **LittleCurriculum** (FineWeb-Edu filtered to U.S. grades K-5). WSD schedule, sharded Muon, MXFP8, Megatron-Core on 8xB200.
 - **SFT:** behavior SFT directly on the cooloff-blend base (no intermediate SFT stage): K-5 math CoT (30k) + smoltalk general chat (15k) + K-5 GSM8K + format-control pairs (answer-only, show-steps, length constraints; user-turn and system-turn variants) + LittleLearner identity data. fp32 master parameters, lr 1e-5, 1 epoch. The model chats on casual prompts, states that it is LittleLearner, and follows answer-format instructions given in the user turn or the system prompt.
 
+## Evaluation
+MathCAMPS (paper-filtered):
+- K-5 pass@64 **78.7** / pass@1 **31.4**
+Behavior probes (greedy):
+- casual prompts get conversational replies; identity answered as LittleLearner
+- answer-format instruction obedience: user turn **0.90**, held-out system prompt **0.85**
+
+
 ## Usage
 
 ```python