diff --git a/plugins/search-everywhere-ml/ranking/core/src/com/intellij/searchEverywhereMl/ranking/core/model/SearchEverywhereFeatureNameConverter.kt b/plugins/search-everywhere-ml/ranking/core/src/com/intellij/searchEverywhereMl/ranking/core/model/SearchEverywhereFeatureNameConverter.kt
new file mode 100644
index 000000000000..88a95215f184
--- /dev/null
+++ b/plugins/search-everywhere-ml/ranking/core/src/com/intellij/searchEverywhereMl/ranking/core/model/SearchEverywhereFeatureNameConverter.kt
@@ -0,0 +1,41 @@
+// Copyright 2000-2024 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+package com.intellij.searchEverywhereMl.ranking.core.model
+
+// This conversion is required while bundled models still expect legacy camelCase names.
+// It can be removed after models are re-trained with snake_case feature names.
+private val LEGACY_FEATURE_NAME_ALIASES = mapOf(
+  "action_plugin_type" to "pluginType",
+  "is_in_library" to "isFromLibrary",
+  "max_usage_se" to "maxUsageSE",
+  "min_usage_se" to "minUsageSE",
+)
+
+internal fun withLegacyFeatureNameAliases(features: Map<String, Any?>): Map<String, Any?> {
+  val featuresWithLegacyAliases = HashMap<String, Any?>(features.size * 2)
+  for ((featureName, value) in features) {
+    featuresWithLegacyAliases[featureName] = value
+    featuresWithLegacyAliases.putIfAbsent(toLegacyFeatureName(featureName), value)
+  }
+  return featuresWithLegacyAliases
+}
+
+internal fun toLegacyFeatureName(featureName: String): String {
+  return LEGACY_FEATURE_NAME_ALIASES[featureName] ?: featureName.snakeCaseToCamelCase()
+}
+
+private fun String.snakeCaseToCamelCase(): String {
+  if (indexOf('_') < 0) return this
+
+  val result = StringBuilder(length)
+  var uppercaseNext = false
+  for (char in this) {
+    if (char == '_') {
+      uppercaseNext = true
+      continue
+    }
+
+    result.append(if (uppercaseNext) char.uppercaseChar() else char)
+    uppercaseNext = false
+  }
+  return result.toString()
+}
diff --git a/plugins/search-everywhere-ml/ranking/core/src/com/intellij/searchEverywhereMl/ranking/core/model/SearchEverywhereRankingModel.kt b/plugins/search-everywhere-ml/ranking/core/src/com/intellij/searchEverywhereMl/ranking/core/model/SearchEverywhereRankingModel.kt
index efde2cf47896..8b4edd0c535f 100644
--- a/plugins/search-everywhere-ml/ranking/core/src/com/intellij/searchEverywhereMl/ranking/core/model/SearchEverywhereRankingModel.kt
+++ b/plugins/search-everywhere-ml/ranking/core/src/com/intellij/searchEverywhereMl/ranking/core/model/SearchEverywhereRankingModel.kt
@@ -12,7 +12,7 @@ import com.intellij.searchEverywhereMl.ranking.core.features.SearchEverywhereFil
 internal abstract class SearchEverywhereRankingModel(protected val model: DecisionFunction) {
   abstract fun predict(features: Map<String, Any?>): Double
   protected fun rawModelPredict(features: Map<String, Any?>): Double {
-    return model.predict(buildArray(model.featuresOrder, features))
+    return model.predict(buildArray(model.featuresOrder, withLegacyFeatureNameAliases(features)))
   }
 
   private fun buildArray(featuresOrder: Array<FeatureMapper>, features: Map<String, Any?>): DoubleArray {
diff --git a/plugins/search-everywhere-ml/ranking/core/test/com/intellij/searchEverywhereMl/ranking/core/model/SearchEverywhereFeatureNameConverterTest.kt b/plugins/search-everywhere-ml/ranking/core/test/com/intellij/searchEverywhereMl/ranking/core/model/SearchEverywhereFeatureNameConverterTest.kt
new file mode 100644
index 000000000000..681f0e6b4ce8
--- /dev/null
+++ b/plugins/search-everywhere-ml/ranking/core/test/com/intellij/searchEverywhereMl/ranking/core/model/SearchEverywhereFeatureNameConverterTest.kt
@@ -0,0 +1,38 @@
+package com.intellij.searchEverywhereMl.ranking.core.model
+
+import org.junit.Assert.assertEquals
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.JUnit4
+
+@RunWith(JUnit4::class)
+internal class SearchEverywhereFeatureNameConverterTest {
+  @Test
+  fun `snake case name is converted to camelCase`() {
+    assertEquals("queryLength", toLegacyFeatureName("query_length"))
+  }
+
+  @Test
+  fun `non trivial legacy names are taken from lookup table`() {
+    assertEquals("pluginType", toLegacyFeatureName("action_plugin_type"))
+    assertEquals("isFromLibrary", toLegacyFeatureName("is_in_library"))
+    assertEquals("maxUsageSE", toLegacyFeatureName("max_usage_se"))
+    assertEquals("minUsageSE", toLegacyFeatureName("min_usage_se"))
+  }
+
+  @Test
+  fun `aliases are added and existing keys are preserved`() {
+    val features = mapOf(
+      "query_length" to 7,
+      "queryLength" to 3,
+      "is_in_library" to true,
+    )
+
+    val featuresWithAliases = withLegacyFeatureNameAliases(features)
+
+    assertEquals(7, featuresWithAliases["query_length"])
+    assertEquals(3, featuresWithAliases["queryLength"])
+    assertEquals(true, featuresWithAliases["is_in_library"])
+    assertEquals(true, featuresWithAliases["isFromLibrary"])
+  }
+}