fix: rename semantic drift to lexical drift, update default model names

Jaccard distance measures vocabulary replacement rate, not semantic
similarity. Renamed all labels and comments accordingly. Updated
hardcoded default models to current versions (gpt-5.4-mini,
claude-haiku-4-5-20251001, gemini-2.5-flash).

Author: JNK234

demos/provider-sensitivity/config-multi-provider.txt

@@ -1,12 +1,11 @@
-# Demo 3: Provider Sensitivity - Multi-provider configuration
-# Fill in keys for the providers you want to compare.
+# Provider Sensitivity - Multi-provider config
+# Fill in your API keys for each provider you want to compare.
 # The demo will automatically skip providers that are not ready.
 
-# Default provider/model on startup
-provider=ollama
-model=llama3.2:3b
+provider=openai
+model=gpt-5.4-mini
 temperature=0.4
-max_tokens=250
+max_tokens=1000
 timeout_seconds=45
 
 # Cloud API keys (leave empty to skip provider, fill in to enable)
@@ -15,12 +14,10 @@ anthropic_api_key=
 gemini_api_key=
 
 # Ollama local endpoint (no key required)
-# Start with: ollama serve
-# Ensure your selected model is pulled, for example: ollama pull llama3.2
 ollama_base_url=http://localhost:11434
 
-# Optional per-provider overrides
-openai_model=gpt-4o-mini
-anthropic_model=claude-3-5-haiku-latest
-gemini_model=gemini-2.0-flash
+# Per-provider model overrides
+openai_model=gpt-5.4-mini
+anthropic_model=claude-haiku-4-5-20251001
+gemini_model=gemini-2.5-flash
 ollama_model=llama3.2:3b

demos/provider-sensitivity/provider-sensitivity.nlogox

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <model version="NetLogo 7.0.3" snapToGrid="true">
-  <code><![CDATA[; ABOUTME: Telephone Game demo — parallel provider chains paraphrase a seed message, revealing semantic drift.
+  <code><![CDATA[; ABOUTME: Telephone Game demo — parallel provider chains paraphrase a seed message, revealing lexical drift.
 ; ABOUTME: Uses turtles, directed links, Jaccard-based drift scoring, optional thinking mode.
 
 extensions [llm]
@@ -12,7 +12,7 @@ turtles-own [
   chain-position      ;; 0 = seed, 1..N-1 = paraphrase positions
   current-message     ;; message this turtle holds
   original-message    ;; seed message (for drift comparison)
-  drift-score         ;; [0,1] semantic drift from original
+  drift-score         ;; [0,1] lexical drift from original (Jaccard distance on word sets)
   length-ratio        ;; response length / original length
   processed?          ;; has this turtle completed its paraphrase?
   error?              ;; did this turtle's LLM call fail?
@@ -478,9 +478,9 @@ end
 ;; ===== DEFAULT MODELS =====
 
 to-report get-default-model [prov]
-  if prov = "openai"    [ report "gpt-4o-mini" ]
-  if prov = "anthropic" [ report "claude-3-5-haiku-latest" ]
-  if prov = "gemini"    [ report "gemini-2.0-flash" ]
+  if prov = "openai"    [ report "gpt-5.4-mini" ]
+  if prov = "anthropic" [ report "claude-haiku-4-5-20251001" ]
+  if prov = "gemini"    [ report "gemini-2.5-flash" ]
   if prov = "ollama"    [ report "llama3.2:3b" ]
   report "unknown"
 end
@@ -644,8 +644,8 @@ end
     <slider x="15" step="1" y="170" max="10" width="230" display="chain-length" height="50" min="3" direction="Horizontal" default="6.0" variable="chain-length"></slider>
     <switch x="15" y="225" height="40" on="true" variable="show-labels?" width="230" display="show-labels?"></switch>
     <switch x="15" y="265" height="40" on="false" variable="thinking-mode?" width="230" display="thinking-mode?"></switch>
-    <plot x="45" autoPlotX="true" yMax="1.0" autoPlotY="true" yAxis="Drift" y="505" xMin="0.0" height="165" legend="true" xMax="10.0" yMin="0.0" width="550" xAxis="Chain Position" display="Semantic Drift by Provider">
-      <setup>set-current-plot "Semantic Drift by Provider"</setup>
+    <plot x="45" autoPlotX="true" yMax="1.0" autoPlotY="true" yAxis="Drift" y="505" xMin="0.0" height="165" legend="true" xMax="10.0" yMin="0.0" width="550" xAxis="Chain Position" display="Lexical Drift by Provider">
+      <setup>set-current-plot "Lexical Drift by Provider"</setup>
       <update><![CDATA[let idx 0
 foreach ready-providers-list [ prov ->
   create-temporary-plot-pen prov
@@ -680,7 +680,7 @@ foreach ready-providers-list [ prov ->
   </widgets>
   <info>## WHAT IS IT?
 
-A Telephone Game for LLMs. Parallel chains of turtles pass a seed message through repeated paraphrasing by different LLM providers. Each position in the chain asks its provider to rephrase what it received. As the message travels, semantic drift accumulates — and different providers drift at different rates and in different ways.
+A Telephone Game for LLMs. Parallel chains of turtles pass a seed message through repeated paraphrasing by different LLM providers. Each position in the chain asks its provider to rephrase what it received. As the message travels, lexical drift accumulates — vocabulary shifts as each provider substitutes its own word choices, and different providers drift at different rates.
 
 ## HOW IT WORKS