Add OpenRouter embedding models to catalog

- text-embedding-3-small via OpenRouter (/bin/zsh.02/MTok)
- text-embedding-3-large via OpenRouter (/bin/zsh.13/MTok)
- qwen3-embedding-8b (/bin/zsh.01/MTok)
- qwen3-embedding-4b (/bin/zsh.02/MTok)

Embedding catalog now has 11 models (was 7).

Author: dcosson

internal/ai/models/embedding_catalog.json

@@ -117,5 +117,73 @@
     "provider": "cohere",
     "supportsDimCtrl": false,
     "supportsTaskType": true
+  },
+  {
+    "api": "openai-embeddings",
+    "baseUrl": "https://openrouter.ai/api/v1",
+    "cost": {
+      "perMTok": 0.02
+    },
+    "defaultDims": 1536,
+    "id": "openai/text-embedding-3-small",
+    "maxBatchSize": 2048,
+    "maxDims": 1536,
+    "maxInputTokens": 8192,
+    "minDims": 256,
+    "name": "Text Embedding 3 Small (OpenRouter)",
+    "provider": "openrouter",
+    "supportsDimCtrl": true,
+    "supportsTaskType": false
+  },
+  {
+    "api": "openai-embeddings",
+    "baseUrl": "https://openrouter.ai/api/v1",
+    "cost": {
+      "perMTok": 0.13
+    },
+    "defaultDims": 3072,
+    "id": "openai/text-embedding-3-large",
+    "maxBatchSize": 2048,
+    "maxDims": 3072,
+    "maxInputTokens": 8192,
+    "minDims": 256,
+    "name": "Text Embedding 3 Large (OpenRouter)",
+    "provider": "openrouter",
+    "supportsDimCtrl": true,
+    "supportsTaskType": false
+  },
+  {
+    "api": "openai-embeddings",
+    "baseUrl": "https://openrouter.ai/api/v1",
+    "cost": {
+      "perMTok": 0.01
+    },
+    "defaultDims": 1024,
+    "id": "qwen/qwen3-embedding-8b",
+    "maxBatchSize": 2048,
+    "maxDims": 1024,
+    "maxInputTokens": 32000,
+    "minDims": 1024,
+    "name": "Qwen3 Embedding 8B",
+    "provider": "openrouter",
+    "supportsDimCtrl": false,
+    "supportsTaskType": false
+  },
+  {
+    "api": "openai-embeddings",
+    "baseUrl": "https://openrouter.ai/api/v1",
+    "cost": {
+      "perMTok": 0.02
+    },
+    "defaultDims": 1024,
+    "id": "qwen/qwen3-embedding-4b",
+    "maxBatchSize": 2048,
+    "maxDims": 1024,
+    "maxInputTokens": 32768,
+    "minDims": 1024,
+    "name": "Qwen3 Embedding 4B",
+    "provider": "openrouter",
+    "supportsDimCtrl": false,
+    "supportsTaskType": false
   }
 ]

scripts/update-model-catalog.py

@@ -381,6 +381,29 @@ def embedding_model(id_, name, api, provider, base_url, max_input, default_dims,
         "cohere-embeddings", "cohere", "https://api.cohere.com/v2",
         512, 1024, 1024, 1024, 96, False, True, 0.1,
     ),
+    # OpenRouter embeddings -- source: https://openrouter.ai/models (embedding models)
+    # OpenRouter uses OpenAI-compatible embeddings API at /api/v1/embeddings
+    # Pricing is pass-through from underlying providers (no markup)
+    embedding_model(
+        "openai/text-embedding-3-small", "Text Embedding 3 Small (OpenRouter)",
+        "openai-embeddings", "openrouter", "https://openrouter.ai/api/v1",
+        8192, 1536, 1536, 256, 2048, True, False, 0.02,
+    ),
+    embedding_model(
+        "openai/text-embedding-3-large", "Text Embedding 3 Large (OpenRouter)",
+        "openai-embeddings", "openrouter", "https://openrouter.ai/api/v1",
+        8192, 3072, 3072, 256, 2048, True, False, 0.13,
+    ),
+    embedding_model(
+        "qwen/qwen3-embedding-8b", "Qwen3 Embedding 8B",
+        "openai-embeddings", "openrouter", "https://openrouter.ai/api/v1",
+        32000, 1024, 1024, 1024, 2048, False, False, 0.01,
+    ),
+    embedding_model(
+        "qwen/qwen3-embedding-4b", "Qwen3 Embedding 4B",
+        "openai-embeddings", "openrouter", "https://openrouter.ai/api/v1",
+        32768, 1024, 1024, 1024, 2048, False, False, 0.02,
+    ),
 ]