diff --git a/_elasticsearch/index_definitions/model_weights_v1.json b/_elasticsearch/index_definitions/model_weights_v1.json
index 1028619e1d..f23a37aa95 100644
--- a/_elasticsearch/index_definitions/model_weights_v1.json
+++ b/_elasticsearch/index_definitions/model_weights_v1.json
@@ -13,6 +13,7 @@
       "weights_category" : { "type" : "keyword" },
 
       "title" : { "type" : "search_as_you_type" },
+      "title_as_keyword" : { "type" : "keyword" },
 
       "maybe_cover_image_media_file_token" : { "type" : "keyword" },
       "maybe_cover_image_public_bucket_hash" : { "type" : "keyword" },
diff --git a/crates/cli/production/elasticsearch-cli/src/plans/create_all_model_weight_documents.rs b/crates/cli/production/elasticsearch-cli/src/plans/create_all_model_weight_documents.rs
index 5122078b5e..fbe3a10418 100644
--- a/crates/cli/production/elasticsearch-cli/src/plans/create_all_model_weight_documents.rs
+++ b/crates/cli/production/elasticsearch-cli/src/plans/create_all_model_weight_documents.rs
@@ -13,7 +13,11 @@ use errors::AnyhowResult;
 use mysql_queries::queries::model_weights::list::list_model_weights_for_elastic_search_backfill_using_cursor::{list_model_weights_for_elastic_search_backfill_using_cursor, ModelWeightForElasticsearchRecord};
 use storyteller_root::get_storyteller_rust_root;
 
-pub async fn create_all_model_weight_documents(mysql: &Pool<MySql>, elasticsearch: &Elasticsearch) -> AnyhowResult<()> {
+pub async fn create_all_model_weight_documents(
+  mysql: &Pool<MySql>,
+  elasticsearch: &Elasticsearch
+) -> AnyhowResult<()> {
+
   info!("Create all model weight documents.");
 
   // TODO(bt, 2024-01-10): expose this as a CLI flag
@@ -63,7 +67,8 @@ async fn create_document_from_record(elasticsearch: &Elasticsearch, record: Mode
     weights_type: record.weights_type,
     weights_category: record.weights_category,
 
-    title: record.title,
+    title: record.title.clone(),
+    title_as_keyword: record.title,
 
     maybe_cover_image_media_file_token: record.maybe_cover_image_media_file_token,
     maybe_cover_image_public_bucket_hash: record.maybe_cover_image_public_bucket_hash,
diff --git a/crates/lib/elasticsearch_schema/src/documents/model_weight_document.rs b/crates/lib/elasticsearch_schema/src/documents/model_weight_document.rs
index ad5be53cce..1e2bd588d6 100644
--- a/crates/lib/elasticsearch_schema/src/documents/model_weight_document.rs
+++ b/crates/lib/elasticsearch_schema/src/documents/model_weight_document.rs
@@ -30,6 +30,10 @@ pub struct ModelWeightDocument {
 
   pub title: String,
 
+  // NB: Not all datatypes are supported in the SQL DSL, so we have a copy of the title:
+  // https://opensearch.org/docs/latest/search-plugins/sql/datatypes/
+  pub title_as_keyword: String,
+
   // *** NB: Never put the bucket path to the model in Elasticsearch ! ***
 
   pub maybe_cover_image_media_file_token: Option<MediaFileToken>,