diff --git a/src/celeste/modalities/text/providers/anthropic/models.py b/src/celeste/modalities/text/providers/anthropic/models.py
index c36ad07f..dc126d51 100644
--- a/src/celeste/modalities/text/providers/anthropic/models.py
+++ b/src/celeste/modalities/text/providers/anthropic/models.py
@@ -77,6 +77,20 @@
             TextParameter.IMAGE: ImagesConstraint(),
         },
     ),
+    Model(
+        id="claude-sonnet-4-6",
+        provider=Provider.ANTHROPIC,
+        display_name="Claude Sonnet 4.6",
+        operations={Modality.TEXT: {Operation.GENERATE, Operation.ANALYZE}},
+        streaming=True,
+        parameter_constraints={
+            Parameter.MAX_TOKENS: Range(min=1, max=64000),
+            TextParameter.THINKING_BUDGET: Range(min=-1, max=64000),
+            TextParameter.OUTPUT_SCHEMA: Schema(),
+            TextParameter.WEB_SEARCH: Bool(),
+            TextParameter.IMAGE: ImagesConstraint(),
+        },
+    ),
     Model(
         id="claude-sonnet-4-20250514",
         provider=Provider.ANTHROPIC,
diff --git a/src/celeste/modalities/text/providers/google/models.py b/src/celeste/modalities/text/providers/google/models.py
index ce5f718e..eda3dad0 100644
--- a/src/celeste/modalities/text/providers/google/models.py
+++ b/src/celeste/modalities/text/providers/google/models.py
@@ -112,4 +112,22 @@
             TextParameter.AUDIO: AudioConstraint(),
         },
     ),
+    Model(
+        id="gemini-3.1-pro-preview",
+        provider=Provider.GOOGLE,
+        display_name="Gemini 3.1 Pro",
+        operations={Modality.TEXT: {Operation.GENERATE, Operation.ANALYZE}},
+        streaming=True,
+        parameter_constraints={
+            Parameter.TEMPERATURE: Range(min=0.0, max=2.0),
+            Parameter.MAX_TOKENS: Range(min=1, max=65536),
+            TextParameter.THINKING_LEVEL: Choice(options=["low", "medium", "high"]),
+            TextParameter.OUTPUT_SCHEMA: Schema(),
+            TextParameter.WEB_SEARCH: Bool(),
+            # Media input support
+            TextParameter.IMAGE: ImagesConstraint(),
+            TextParameter.VIDEO: VideosConstraint(),
+            TextParameter.AUDIO: AudioConstraint(),
+        },
+    ),
 ]