fix DO pricing URL, model_providers name validation, cost_metrics demo endpoint

demos/llm_routing/model_routing_service/demo.sh

@@ -8,9 +8,12 @@ echo ""
 echo "This demo shows how to use the /routing/v1/* endpoints to get"
 echo "routing decisions without actually proxying the request to an LLM."
 echo ""
+echo "The response includes a ranked 'models' list — use models[0] as the"
+echo "primary and fall back to models[1] on 429/5xx errors."
+echo ""
 
-# --- Example 1: OpenAI Chat Completions format ---
-echo "--- 1. Code generation query (OpenAI format) ---"
+# --- Example 1: Code generation (ranked by fastest) ---
+echo "--- 1. Code generation query (prefer: fastest) ---"
 echo ""
 curl -s "$PLANO_URL/routing/v1/chat/completions" \
   -H "Content-Type: application/json" \
@@ -22,8 +25,8 @@ curl -s "$PLANO_URL/routing/v1/chat/completions" \
   }' | python3 -m json.tool
 echo ""
 
-# --- Example 2: Complex reasoning query ---
-echo "--- 2. Complex reasoning query (OpenAI format) ---"
+# --- Example 2: Complex reasoning (ranked by cheapest) ---
+echo "--- 2. Complex reasoning query (prefer: cheapest) ---"
 echo ""
 curl -s "$PLANO_URL/routing/v1/chat/completions" \
   -H "Content-Type: application/json" \
@@ -36,7 +39,7 @@ curl -s "$PLANO_URL/routing/v1/chat/completions" \
 echo ""
 
 # --- Example 3: Simple query (no routing match) ---
-echo "--- 3. Simple query - no routing match (OpenAI format) ---"
+echo "--- 3. Simple query - no routing match (falls back to request model) ---"
 echo ""
 curl -s "$PLANO_URL/routing/v1/chat/completions" \
   -H "Content-Type: application/json" \
@@ -62,8 +65,31 @@ curl -s "$PLANO_URL/routing/v1/messages" \
   }' | python3 -m json.tool
 echo ""
 
-# --- Example 5: Inline routing policy in request body ---
-echo "--- 5. Inline routing_policy (no config needed) ---"
+# --- Example 5: Inline routing_preferences with prefer:cheapest ---
+echo "--- 5. Inline routing_preferences (prefer: cheapest) ---"
+echo "    models[] will be sorted by ascending cost from DigitalOcean pricing"
+echo ""
+curl -s "$PLANO_URL/routing/v1/chat/completions" \
+  -H "Content-Type: application/json" \
+  -d '{
+    "model": "gpt-4o-mini",
+    "messages": [
+      {"role": "user", "content": "Summarize the key differences between TCP and UDP"}
+    ],
+    "routing_preferences": [
+      {
+        "name": "general",
+        "description": "general questions, explanations, and summaries",
+        "models": ["openai/gpt-4o", "openai/gpt-4o-mini"],
+        "selection_policy": {"prefer": "cheapest"}
+      }
+    ]
+  }' | python3 -m json.tool
+echo ""
+
+# --- Example 6: Inline routing_preferences with prefer:fastest ---
+echo "--- 6. Inline routing_preferences (prefer: fastest) ---"
+echo "    models[] will be sorted by ascending P95 latency from Prometheus"
 echo ""
 curl -s "$PLANO_URL/routing/v1/chat/completions" \
   -H "Content-Type: application/json" \
@@ -72,46 +98,12 @@ curl -s "$PLANO_URL/routing/v1/chat/completions" \
     "messages": [
       {"role": "user", "content": "Write a quicksort implementation in Go"}
     ],
-    "routing_policy": [
+    "routing_preferences": [
       {
-        "model": "openai/gpt-4o",
-        "routing_preferences": [
-          {"name": "coding", "description": "code generation, writing functions, debugging"}
-        ]
-      },
-      {
-        "model": "openai/gpt-4o-mini",
-        "routing_preferences": [
-          {"name": "general", "description": "general questions, simple lookups, casual conversation"}
-        ]
-      }
-    ]
-  }' | python3 -m json.tool
-echo ""
-
-# --- Example 6: Inline routing policy with Anthropic format ---
-echo "--- 6. Inline routing_policy (Anthropic format) ---"
-echo ""
-curl -s "$PLANO_URL/routing/v1/messages" \
-  -H "Content-Type: application/json" \
-  -d '{
-    "model": "gpt-4o-mini",
-    "max_tokens": 1024,
-    "messages": [
-      {"role": "user", "content": "What is the weather like today?"}
-    ],
-    "routing_policy": [
-      {
-        "model": "openai/gpt-4o",
-        "routing_preferences": [
-          {"name": "coding", "description": "code generation, writing functions, debugging"}
-        ]
-      },
-      {
-        "model": "openai/gpt-4o-mini",
-        "routing_preferences": [
-          {"name": "general", "description": "general questions, simple lookups, casual conversation"}
-        ]
+        "name": "coding",
+        "description": "code generation, writing functions, debugging",
+        "models": ["anthropic/claude-sonnet-4-20250514", "openai/gpt-4o", "openai/gpt-4o-mini"],
+        "selection_policy": {"prefer": "fastest"}
       }
     ]
   }' | python3 -m json.tool