diff --git a/libs/partners/deepseek/langchain_deepseek/data/_profiles.py b/libs/partners/deepseek/langchain_deepseek/data/_profiles.py
index df496daf7e7..87ec00487e0 100644
--- a/libs/partners/deepseek/langchain_deepseek/data/_profiles.py
+++ b/libs/partners/deepseek/langchain_deepseek/data/_profiles.py
@@ -56,6 +56,27 @@ _PROFILES: dict[str, dict[str, Any]] = {
         "attachment": True,
         "temperature": True,
     },
+    "deepseek-v4-flash": {
+        "name": "DeepSeek V4 Flash",
+        "release_date": "2026-04-24",
+        "last_updated": "2026-04-24",
+        "open_weights": True,
+        "max_input_tokens": 1000000,
+        "max_output_tokens": 384000,
+        "text_inputs": True,
+        "image_inputs": False,
+        "audio_inputs": False,
+        "video_inputs": False,
+        "text_outputs": True,
+        "image_outputs": False,
+        "audio_outputs": False,
+        "video_outputs": False,
+        "reasoning_output": True,
+        "tool_calling": True,
+        "structured_output": True,
+        "attachment": False,
+        "temperature": True,
+    },
     "deepseek-v4-pro": {
         "name": "DeepSeek V4 Pro",
         "release_date": "2026-04-24",
@@ -74,7 +95,7 @@ _PROFILES: dict[str, dict[str, Any]] = {
         "reasoning_output": True,
         "tool_calling": True,
         "structured_output": True,
-        "attachment": True,
+        "attachment": False,
         "temperature": True,
     },
 }
diff --git a/libs/partners/openrouter/langchain_openrouter/data/_profiles.py b/libs/partners/openrouter/langchain_openrouter/data/_profiles.py
index 96a443b25c4..638e3f7b22e 100644
--- a/libs/partners/openrouter/langchain_openrouter/data/_profiles.py
+++ b/libs/partners/openrouter/langchain_openrouter/data/_profiles.py
@@ -583,6 +583,48 @@ _PROFILES: dict[str, dict[str, Any]] = {
         "attachment": False,
         "temperature": True,
     },
+    "deepseek/deepseek-v4-flash": {
+        "name": "DeepSeek V4 Flash",
+        "release_date": "2026-04-24",
+        "last_updated": "2026-04-24",
+        "open_weights": True,
+        "max_input_tokens": 1048576,
+        "max_output_tokens": 393216,
+        "text_inputs": True,
+        "image_inputs": False,
+        "audio_inputs": False,
+        "video_inputs": False,
+        "text_outputs": True,
+        "image_outputs": False,
+        "audio_outputs": False,
+        "video_outputs": False,
+        "reasoning_output": True,
+        "tool_calling": True,
+        "structured_output": True,
+        "attachment": False,
+        "temperature": True,
+    },
+    "deepseek/deepseek-v4-pro": {
+        "name": "DeepSeek V4 Pro",
+        "release_date": "2026-04-24",
+        "last_updated": "2026-04-24",
+        "open_weights": True,
+        "max_input_tokens": 1048576,
+        "max_output_tokens": 393216,
+        "text_inputs": True,
+        "image_inputs": False,
+        "audio_inputs": False,
+        "video_inputs": False,
+        "text_outputs": True,
+        "image_outputs": False,
+        "audio_outputs": False,
+        "video_outputs": False,
+        "reasoning_output": True,
+        "tool_calling": True,
+        "structured_output": True,
+        "attachment": False,
+        "temperature": True,
+    },
     "google/gemini-2.0-flash-001": {
         "name": "Gemini 2.0 Flash",
         "release_date": "2024-12-11",
@@ -2467,6 +2509,28 @@ _PROFILES: dict[str, dict[str, Any]] = {
         "attachment": True,
         "temperature": False,
     },
+    "openai/gpt-5.5": {
+        "name": "GPT-5.5",
+        "release_date": "2026-04-23",
+        "last_updated": "2026-04-23",
+        "open_weights": False,
+        "max_input_tokens": 1050000,
+        "max_output_tokens": 130000,
+        "text_inputs": True,
+        "image_inputs": True,
+        "audio_inputs": False,
+        "pdf_inputs": True,
+        "video_inputs": False,
+        "text_outputs": True,
+        "image_outputs": False,
+        "audio_outputs": False,
+        "video_outputs": False,
+        "reasoning_output": True,
+        "tool_calling": True,
+        "structured_output": True,
+        "attachment": True,
+        "temperature": False,
+    },
     "openai/gpt-oss-120b": {
         "name": "GPT OSS 120B",
         "release_date": "2025-08-05",