diff --git a/src/celeste/modalities/images/providers/google/models.py b/src/celeste/modalities/images/providers/google/models.py
index 1d55c36..6e83f64 100644
--- a/src/celeste/modalities/images/providers/google/models.py
+++ b/src/celeste/modalities/images/providers/google/models.py
@@ -99,6 +99,30 @@
             ImageParameter.REFERENCE_IMAGES: ImagesConstraint(max_count=14),
         },
     ),
+    Model(
+        id="gemini-3.1-flash-image-preview",
+        provider=Provider.GOOGLE,
+        display_name="Nano Banana 2",
+        operations={Modality.IMAGES: {Operation.GENERATE, Operation.EDIT}},
+        parameter_constraints={
+            ImageParameter.ASPECT_RATIO: Choice(
+                options=[
+                    "1:1",
+                    "2:3",
+                    "3:2",
+                    "3:4",
+                    "4:3",
+                    "4:5",
+                    "5:4",
+                    "9:16",
+                    "16:9",
+                    "21:9",
+                ]
+            ),
+            ImageParameter.QUALITY: Choice(options=["1K", "2K", "4K"]),
+            ImageParameter.REFERENCE_IMAGES: ImagesConstraint(max_count=14),
+        },
+    ),
 ]
 
 # Unified model list for registration
diff --git a/src/celeste/modalities/text/providers/google/models.py b/src/celeste/modalities/text/providers/google/models.py
index eda3dad..2e77a66 100644
--- a/src/celeste/modalities/text/providers/google/models.py
+++ b/src/celeste/modalities/text/providers/google/models.py
@@ -130,4 +130,23 @@
             TextParameter.AUDIO: AudioConstraint(),
         },
     ),
+    Model(
+        id="gemini-3.1-flash-lite-preview",
+        provider=Provider.GOOGLE,
+        display_name="Gemini 3.1 Flash Lite Preview",
+        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", "high"]),
+            TextParameter.WEB_SEARCH: Bool(),
+            TextParameter.CODE_EXECUTION: Bool(),
+            TextParameter.OUTPUT_SCHEMA: Schema(),
+            # Media input support
+            TextParameter.IMAGE: ImagesConstraint(),
+            TextParameter.VIDEO: VideosConstraint(),
+            TextParameter.AUDIO: AudioConstraint(),
+        },
+    ),
 ]
diff --git a/src/celeste/modalities/text/providers/openai/models.py b/src/celeste/modalities/text/providers/openai/models.py
index c9b03e1..6268cf9 100644
--- a/src/celeste/modalities/text/providers/openai/models.py
+++ b/src/celeste/modalities/text/providers/openai/models.py
@@ -218,6 +218,70 @@
             TextParameter.IMAGE: ImagesConstraint(),
         },
     ),
+    Model(
+        id="gpt-5.4",
+        provider=Provider.OPENAI,
+        display_name="GPT-5.4",
+        operations={Modality.TEXT: {Operation.GENERATE, Operation.ANALYZE}},
+        streaming=True,
+        parameter_constraints={
+            Parameter.MAX_TOKENS: Range(min=1, max=128000),
+            TextParameter.THINKING_BUDGET: Choice(
+                options=["minimal", "low", "medium", "high", "xhigh"]
+            ),
+            TextParameter.VERBOSITY: Choice(options=["low", "medium", "high"]),
+            TextParameter.WEB_SEARCH: Bool(),
+            TextParameter.OUTPUT_SCHEMA: Schema(),
+            TextParameter.IMAGE: ImagesConstraint(),
+        },
+    ),
+    Model(
+        id="gpt-5.4-pro",
+        provider=Provider.OPENAI,
+        display_name="GPT-5.4 Pro",
+        operations={Modality.TEXT: {Operation.GENERATE, Operation.ANALYZE}},
+        streaming=True,
+        parameter_constraints={
+            Parameter.MAX_TOKENS: Range(min=1, max=128000),
+            TextParameter.THINKING_BUDGET: Choice(
+                options=["minimal", "low", "medium", "high", "xhigh"]
+            ),
+            TextParameter.VERBOSITY: Choice(options=["low", "medium", "high"]),
+            TextParameter.WEB_SEARCH: Bool(),
+            TextParameter.OUTPUT_SCHEMA: Schema(),
+            TextParameter.IMAGE: ImagesConstraint(),
+        },
+    ),
+    Model(
+        id="gpt-5.4-mini",
+        provider=Provider.OPENAI,
+        display_name="GPT-5.4 Mini",
+        operations={Modality.TEXT: {Operation.GENERATE, Operation.ANALYZE}},
+        streaming=True,
+        parameter_constraints={
+            Parameter.MAX_TOKENS: Range(min=1, max=128000),
+            TextParameter.THINKING_BUDGET: Choice(
+                options=["minimal", "low", "medium", "high", "xhigh"]
+            ),
+            TextParameter.OUTPUT_SCHEMA: Schema(),
+            TextParameter.IMAGE: ImagesConstraint(),
+        },
+    ),
+    Model(
+        id="gpt-5.4-nano",
+        provider=Provider.OPENAI,
+        display_name="GPT-5.4 Nano",
+        operations={Modality.TEXT: {Operation.GENERATE, Operation.ANALYZE}},
+        streaming=True,
+        parameter_constraints={
+            Parameter.MAX_TOKENS: Range(min=1, max=128000),
+            TextParameter.THINKING_BUDGET: Choice(
+                options=["minimal", "low", "medium", "high", "xhigh"]
+            ),
+            TextParameter.OUTPUT_SCHEMA: Schema(),
+            TextParameter.IMAGE: ImagesConstraint(),
+        },
+    ),
     Model(
         id="gpt-4.1",
         provider=Provider.OPENAI,
diff --git a/src/celeste/modalities/text/providers/xai/models.py b/src/celeste/modalities/text/providers/xai/models.py
index 8328880..e189f41 100644
--- a/src/celeste/modalities/text/providers/xai/models.py
+++ b/src/celeste/modalities/text/providers/xai/models.py
@@ -88,6 +88,36 @@
             TextParameter.CODE_EXECUTION: Bool(),
         },
     ),
+    Model(
+        id="grok-4.20-beta-0309-reasoning",
+        provider=Provider.XAI,
+        display_name="Grok 4.20 Beta 0309 Reasoning",
+        operations={Modality.TEXT: {Operation.GENERATE}},
+        streaming=True,
+        parameter_constraints={
+            Parameter.TEMPERATURE: Range(min=0.0, max=2.0),
+            Parameter.MAX_TOKENS: Range(min=1, max=30000),
+            TextParameter.WEB_SEARCH: Bool(),
+            TextParameter.X_SEARCH: Bool(),
+            TextParameter.CODE_EXECUTION: Bool(),
+            TextParameter.OUTPUT_SCHEMA: Schema(),
+        },
+    ),
+    Model(
+        id="grok-4.20-beta-0309-non-reasoning",
+        provider=Provider.XAI,
+        display_name="Grok 4.20 Beta 0309 Non Reasoning",
+        operations={Modality.TEXT: {Operation.GENERATE}},
+        streaming=True,
+        parameter_constraints={
+            Parameter.TEMPERATURE: Range(min=0.0, max=2.0),
+            Parameter.MAX_TOKENS: Range(min=1, max=30000),
+            TextParameter.WEB_SEARCH: Bool(),
+            TextParameter.X_SEARCH: Bool(),
+            TextParameter.CODE_EXECUTION: Bool(),
+            TextParameter.OUTPUT_SCHEMA: Schema(),
+        },
+    ),
     Model(
         id="grok-3-mini",
         provider=Provider.XAI,