diff --git a/crates/api_clients/artcraft/artcraft_router/src/api/common_aspect_ratio.rs b/crates/api_clients/artcraft/artcraft_router/src/api/common_aspect_ratio.rs
index b49c8a65e5..a930a146a5 100644
--- a/crates/api_clients/artcraft/artcraft_router/src/api/common_aspect_ratio.rs
+++ b/crates/api_clients/artcraft/artcraft_router/src/api/common_aspect_ratio.rs
@@ -38,6 +38,8 @@ pub enum CommonAspectRatio {
   // These are from the Seedream models
   #[serde(rename = "auto_2k")]
   Auto2k,
+  #[serde(rename = "auto_3k")]
+  Auto3k,
   #[serde(rename = "auto_4k")]
   Auto4k,
 
diff --git a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_flux_2_lora_angles.rs b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_flux_2_lora_angles.rs
index c2b52d5752..ed3eebc605 100644
--- a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_flux_2_lora_angles.rs
+++ b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_flux_2_lora_angles.rs
@@ -80,7 +80,7 @@ fn plan_image_size(
   match aspect_ratio {
     None => Ok(None),
 
-    Some(CommonAspectRatio::Auto) | Some(CommonAspectRatio::Auto2k) | Some(CommonAspectRatio::Auto4k) => {
+    Some(CommonAspectRatio::Auto) | Some(CommonAspectRatio::Auto2k) | Some(CommonAspectRatio::Auto3k) | Some(CommonAspectRatio::Auto4k) => {
       Ok(Some(S::SquareHd))
     }
 
diff --git a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_gpt_image_1.rs b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_gpt_image_1.rs
index cd0185ad67..75c18d0cb6 100644
--- a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_gpt_image_1.rs
+++ b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_gpt_image_1.rs
@@ -121,6 +121,7 @@ fn plan_image_size(aspect_ratio: Option<CommonAspectRatio>) -> Option<ArtcraftGp
     None
     | Some(CommonAspectRatio::Auto)
     | Some(CommonAspectRatio::Auto2k)
+    | Some(CommonAspectRatio::Auto3k)
     | Some(CommonAspectRatio::Auto4k) => None,
 
     Some(CommonAspectRatio::Square) | Some(CommonAspectRatio::SquareHd) => Some(S::Square),
diff --git a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_gpt_image_1p5.rs b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_gpt_image_1p5.rs
index 42ee2a59cb..9a0b69a946 100644
--- a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_gpt_image_1p5.rs
+++ b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_gpt_image_1p5.rs
@@ -79,6 +79,7 @@ fn plan_image_size(
     None
     | Some(CommonAspectRatio::Auto)
     | Some(CommonAspectRatio::Auto2k)
+    | Some(CommonAspectRatio::Auto3k)
     | Some(CommonAspectRatio::Auto4k) => Ok(None),
 
     // Square
diff --git a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_qwen_edit_2511_angles.rs b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_qwen_edit_2511_angles.rs
index 5dad342099..4f7933d2ed 100644
--- a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_qwen_edit_2511_angles.rs
+++ b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_qwen_edit_2511_angles.rs
@@ -82,7 +82,7 @@ fn plan_image_size(
   match aspect_ratio {
     None => Ok(None),
 
-    Some(CommonAspectRatio::Auto) | Some(CommonAspectRatio::Auto2k) | Some(CommonAspectRatio::Auto4k) => {
+    Some(CommonAspectRatio::Auto) | Some(CommonAspectRatio::Auto2k) | Some(CommonAspectRatio::Auto3k) | Some(CommonAspectRatio::Auto4k) => {
       Ok(Some(S::SquareHd))
     }
 
diff --git a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_seedream_4.rs b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_seedream_4.rs
index 1fe3f1d5d0..ce31274a56 100644
--- a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_seedream_4.rs
+++ b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_seedream_4.rs
@@ -72,7 +72,7 @@ fn plan_image_size(
       if is_edit_mode { Ok(Some(S::Auto)) } else { Ok(Some(S::Square)) }
     }
 
-    Some(CommonAspectRatio::Auto2k) => Ok(Some(S::Auto2k)),
+    Some(CommonAspectRatio::Auto2k) | Some(CommonAspectRatio::Auto3k) => Ok(Some(S::Auto2k)),
     Some(CommonAspectRatio::Auto4k) => Ok(Some(S::Auto4k)),
 
     // Square
diff --git a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_seedream_4p5.rs b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_seedream_4p5.rs
index 0675319e9d..e6b964faa7 100644
--- a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_seedream_4p5.rs
+++ b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_seedream_4p5.rs
@@ -72,7 +72,7 @@ fn plan_image_size(
       if is_edit_mode { Ok(Some(S::Auto2k)) } else { Ok(Some(S::Square)) }
     }
 
-    Some(CommonAspectRatio::Auto2k) => Ok(Some(S::Auto2k)),
+    Some(CommonAspectRatio::Auto2k) | Some(CommonAspectRatio::Auto3k) => Ok(Some(S::Auto2k)),
     Some(CommonAspectRatio::Auto4k) => Ok(Some(S::Auto4k)),
 
     // Square
diff --git a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_seedream_5_lite.rs b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_seedream_5_lite.rs
index 5c8af1d516..ed77a9d4eb 100644
--- a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_seedream_5_lite.rs
+++ b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/artcraft/plan_generate_image_artcraft_seedream_5_lite.rs
@@ -73,6 +73,7 @@ fn plan_image_size(
     }
 
     Some(CommonAspectRatio::Auto2k) => Ok(Some(S::Auto2k)),
+    Some(CommonAspectRatio::Auto3k) => Ok(Some(S::Auto3k)),
     // 5 Lite max is auto_3K; map Auto4k down to Auto3k
     Some(CommonAspectRatio::Auto4k) => Ok(Some(S::Auto3k)),
 
@@ -148,8 +149,6 @@ mod tests {
   use super::*;
   use crate::api::common_aspect_ratio::CommonAspectRatio;
   use crate::api::image_list_ref::ImageListRef;
-  use crate::errors::artcraft_router_error::ArtcraftRouterError;
-  use crate::errors::client_error::ClientError;
   use crate::test_helpers::base_seedream_5_lite_image_request;
   use artcraft_api_defs::generate::image::multi_function::bytedance_seedream_5_lite_multi_function_image_gen::{
     BytedanceSeedream5LiteMultiFunctionImageGenImageSize as S,
diff --git a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/fal/plan_generate_image_fal_gpt_image_1.rs b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/fal/plan_generate_image_fal_gpt_image_1.rs
index b35bde7b27..923b07e119 100644
--- a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/fal/plan_generate_image_fal_gpt_image_1.rs
+++ b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/fal/plan_generate_image_fal_gpt_image_1.rs
@@ -96,6 +96,7 @@ fn plan_image_size(aspect_ratio: Option<CommonAspectRatio>) -> Option<FalGptImag
     None
     | Some(CommonAspectRatio::Auto)
     | Some(CommonAspectRatio::Auto2k)
+    | Some(CommonAspectRatio::Auto3k)
     | Some(CommonAspectRatio::Auto4k) => None,
 
     Some(CommonAspectRatio::Square) | Some(CommonAspectRatio::SquareHd) => Some(S::Square),
diff --git a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/fal/plan_generate_image_fal_gpt_image_1p5.rs b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/fal/plan_generate_image_fal_gpt_image_1p5.rs
index 8283c0f56a..dda015a098 100644
--- a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/fal/plan_generate_image_fal_gpt_image_1p5.rs
+++ b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/fal/plan_generate_image_fal_gpt_image_1p5.rs
@@ -93,6 +93,7 @@ fn plan_image_size(aspect_ratio: Option<CommonAspectRatio>) -> Option<FalGptImag
     None
     | Some(CommonAspectRatio::Auto)
     | Some(CommonAspectRatio::Auto2k)
+    | Some(CommonAspectRatio::Auto3k)
     | Some(CommonAspectRatio::Auto4k) => None,
 
     Some(CommonAspectRatio::Square) | Some(CommonAspectRatio::SquareHd) => Some(S::Square),
diff --git a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/fal/plan_generate_image_fal_seedream_4.rs b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/fal/plan_generate_image_fal_seedream_4.rs
index fd04881759..b5bfc20b9a 100644
--- a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/fal/plan_generate_image_fal_seedream_4.rs
+++ b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/fal/plan_generate_image_fal_seedream_4.rs
@@ -84,7 +84,7 @@ fn plan_image_size(
     Some(CommonAspectRatio::Auto) => {
       if is_edit_mode { Ok(Some(S::Auto)) } else { Ok(Some(S::Square)) }
     }
-    Some(CommonAspectRatio::Auto2k) => Ok(Some(S::Auto2k)),
+    Some(CommonAspectRatio::Auto2k) | Some(CommonAspectRatio::Auto3k) => Ok(Some(S::Auto2k)),
     Some(CommonAspectRatio::Auto4k) => Ok(Some(S::Auto4k)),
 
     Some(CommonAspectRatio::Square) => Ok(Some(S::Square)),
diff --git a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/fal/plan_generate_image_fal_seedream_4p5.rs b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/fal/plan_generate_image_fal_seedream_4p5.rs
index ee91d43e6d..8f143956b8 100644
--- a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/fal/plan_generate_image_fal_seedream_4p5.rs
+++ b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/fal/plan_generate_image_fal_seedream_4p5.rs
@@ -78,7 +78,7 @@ fn plan_image_size(
     None => Ok(None),
 
     // No bare Auto for v4.5 — fall back to Auto2k.
-    Some(CommonAspectRatio::Auto) | Some(CommonAspectRatio::Auto2k) => Ok(Some(S::Auto2k)),
+    Some(CommonAspectRatio::Auto) | Some(CommonAspectRatio::Auto2k) | Some(CommonAspectRatio::Auto3k) => Ok(Some(S::Auto2k)),
     Some(CommonAspectRatio::Auto4k) => Ok(Some(S::Auto4k)),
 
     Some(CommonAspectRatio::Square) => Ok(Some(S::Square)),
diff --git a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/fal/plan_generate_image_fal_seedream_5_lite.rs b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/fal/plan_generate_image_fal_seedream_5_lite.rs
index 813d0bd57b..897b27dc45 100644
--- a/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/fal/plan_generate_image_fal_seedream_5_lite.rs
+++ b/crates/api_clients/artcraft/artcraft_router/src/generate/generate_image/plan/fal/plan_generate_image_fal_seedream_5_lite.rs
@@ -87,6 +87,7 @@ fn plan_image_size(
     },
 
     Some(CommonAspectRatio::Auto) | Some(CommonAspectRatio::Auto2k) => Ok(Some(S::Auto2k)),
+    Some(CommonAspectRatio::Auto3k) => Ok(Some(S::Auto3k)),
     // No 4K — fall back to 3K.
     Some(CommonAspectRatio::Auto4k) => Ok(Some(S::Auto3k)),
 
diff --git a/crates/schema/public/enums/src/common/generation/common_aspect_ratio.rs b/crates/schema/public/enums/src/common/generation/common_aspect_ratio.rs
index d635947af4..bb2829fd08 100644
--- a/crates/schema/public/enums/src/common/generation/common_aspect_ratio.rs
+++ b/crates/schema/public/enums/src/common/generation/common_aspect_ratio.rs
@@ -34,6 +34,8 @@ pub enum CommonAspectRatio {
   Tall,
   #[serde(rename = "auto_2k")]
   Auto2k,
+  #[serde(rename = "auto_3k")]
+  Auto3k,
   #[serde(rename = "auto_4k")]
   Auto4k,
   SquareHd,
@@ -61,6 +63,7 @@ impl CommonAspectRatio {
       Self::Wide => "wide",
       Self::Tall => "tall",
       Self::Auto2k => "auto_2k",
+      Self::Auto3k => "auto_3k",
       Self::Auto4k => "auto_4k",
       Self::SquareHd => "square_hd",
     }
@@ -83,6 +86,7 @@ impl CommonAspectRatio {
       "wide" => Ok(Self::Wide),
       "tall" => Ok(Self::Tall),
       "auto_2k" => Ok(Self::Auto2k),
+      "auto_3k" => Ok(Self::Auto3k),
       "auto_4k" => Ok(Self::Auto4k),
       "square_hd" => Ok(Self::SquareHd),
       _ => Err(EnumError::CouldNotConvertFromString(value.to_string())),
@@ -106,6 +110,7 @@ impl CommonAspectRatio {
       Self::Wide,
       Self::Tall,
       Self::Auto2k,
+      Self::Auto3k,
       Self::Auto4k,
       Self::SquareHd,
     ])
@@ -139,6 +144,7 @@ mod tests {
       assert_serialization(CommonAspectRatio::Wide, "wide");
       assert_serialization(CommonAspectRatio::Tall, "tall");
       assert_serialization(CommonAspectRatio::Auto2k, "auto_2k");
+      assert_serialization(CommonAspectRatio::Auto3k, "auto_3k");
       assert_serialization(CommonAspectRatio::Auto4k, "auto_4k");
       assert_serialization(CommonAspectRatio::SquareHd, "square_hd");
     }
@@ -160,6 +166,7 @@ mod tests {
       assert_eq!(CommonAspectRatio::Wide.to_str(), "wide");
       assert_eq!(CommonAspectRatio::Tall.to_str(), "tall");
       assert_eq!(CommonAspectRatio::Auto2k.to_str(), "auto_2k");
+      assert_eq!(CommonAspectRatio::Auto3k.to_str(), "auto_3k");
       assert_eq!(CommonAspectRatio::Auto4k.to_str(), "auto_4k");
       assert_eq!(CommonAspectRatio::SquareHd.to_str(), "square_hd");
     }
@@ -181,6 +188,7 @@ mod tests {
       assert_eq!(CommonAspectRatio::from_str("wide").unwrap(), CommonAspectRatio::Wide);
       assert_eq!(CommonAspectRatio::from_str("tall").unwrap(), CommonAspectRatio::Tall);
       assert_eq!(CommonAspectRatio::from_str("auto_2k").unwrap(), CommonAspectRatio::Auto2k);
+      assert_eq!(CommonAspectRatio::from_str("auto_3k").unwrap(), CommonAspectRatio::Auto3k);
       assert_eq!(CommonAspectRatio::from_str("auto_4k").unwrap(), CommonAspectRatio::Auto4k);
       assert_eq!(CommonAspectRatio::from_str("square_hd").unwrap(), CommonAspectRatio::SquareHd);
     }
@@ -199,7 +207,7 @@ mod tests {
     #[test]
     fn all_variants() {
       let variants = CommonAspectRatio::all_variants();
-      assert_eq!(variants.len(), 17);
+      assert_eq!(variants.len(), 18);
     }
   }
 
diff --git a/crates/service/web/storyteller_web/src/configs/omni_gen/image_models.rs b/crates/service/web/storyteller_web/src/configs/omni_gen/image_models.rs
index 20ed8284ec..e46c4f123b 100644
--- a/crates/service/web/storyteller_web/src/configs/omni_gen/image_models.rs
+++ b/crates/service/web/storyteller_web/src/configs/omni_gen/image_models.rs
@@ -289,6 +289,7 @@ fn build_omni_gen_image_models() -> Vec<OmniGenImageModelDetails> {
     image_refs_supported: Some(true),
     aspect_ratio_options: Some(vec![
       CommonAspectRatio::Auto2k,
+      CommonAspectRatio::Auto3k,
       CommonAspectRatio::Square,
       CommonAspectRatio::SquareHd,
       CommonAspectRatio::WideFourByThree,
@@ -297,7 +298,7 @@ fn build_omni_gen_image_models() -> Vec<OmniGenImageModelDetails> {
       CommonAspectRatio::TallNineBySixteen,
     ]),
     aspect_ratio_default: Some(CommonAspectRatio::Square),
-    aspect_ratio_default_when_editing: Some(CommonAspectRatio::Auto2k),
+    aspect_ratio_default_when_editing: Some(CommonAspectRatio::Auto3k),
     batch_size_min: Some(1),
     batch_size_max: Some(4),
     batch_size_default: Some(1),
diff --git a/crates/service/web/storyteller_web/src/http_server/endpoints/generate/cost_estimate/image/estimate_image_cost_handler.rs b/crates/service/web/storyteller_web/src/http_server/endpoints/generate/cost_estimate/image/estimate_image_cost_handler.rs
index e8e79f8454..ca64fd4353 100644
--- a/crates/service/web/storyteller_web/src/http_server/endpoints/generate/cost_estimate/image/estimate_image_cost_handler.rs
+++ b/crates/service/web/storyteller_web/src/http_server/endpoints/generate/cost_estimate/image/estimate_image_cost_handler.rs
@@ -159,6 +159,7 @@ fn map_aspect_ratio(ar: CommonAspectRatio) -> RouterAspectRatio {
     CommonAspectRatio::Wide => RouterAspectRatio::Wide,
     CommonAspectRatio::Tall => RouterAspectRatio::Tall,
     CommonAspectRatio::Auto2k => RouterAspectRatio::Auto2k,
+    CommonAspectRatio::Auto3k => RouterAspectRatio::Auto3k,
     CommonAspectRatio::Auto4k => RouterAspectRatio::Auto4k,
     CommonAspectRatio::SquareHd => RouterAspectRatio::SquareHd,
   }
diff --git a/crates/service/web/storyteller_web/src/http_server/endpoints/generate/cost_estimate/video/estimate_video_cost_handler.rs b/crates/service/web/storyteller_web/src/http_server/endpoints/generate/cost_estimate/video/estimate_video_cost_handler.rs
index 4dce7e82b2..e87f55b335 100644
--- a/crates/service/web/storyteller_web/src/http_server/endpoints/generate/cost_estimate/video/estimate_video_cost_handler.rs
+++ b/crates/service/web/storyteller_web/src/http_server/endpoints/generate/cost_estimate/video/estimate_video_cost_handler.rs
@@ -168,6 +168,7 @@ fn map_aspect_ratio(ar: CommonAspectRatio) -> RouterAspectRatio {
     CommonAspectRatio::Wide => RouterAspectRatio::Wide,
     CommonAspectRatio::Tall => RouterAspectRatio::Tall,
     CommonAspectRatio::Auto2k => RouterAspectRatio::Auto2k,
+    CommonAspectRatio::Auto3k => RouterAspectRatio::Auto3k,
     CommonAspectRatio::Auto4k => RouterAspectRatio::Auto4k,
     CommonAspectRatio::SquareHd => RouterAspectRatio::SquareHd,
   }