diff --git a/enterprise/app/helpers/captain/chat_helper.rb b/enterprise/app/helpers/captain/chat_helper.rb
index 9bbbd86a5..12458a99c 100644
--- a/enterprise/app/helpers/captain/chat_helper.rb
+++ b/enterprise/app/helpers/captain/chat_helper.rb
@@ -20,7 +20,7 @@ module Captain::ChatHelper
   private
 
   def build_chat
-    llm_chat = chat(model: @model, temperature: temperature)
+    llm_chat = chat(model: model, temperature: temperature)
     llm_chat = llm_chat.with_params(response_format: { type: 'json_object' })
 
     llm_chat = setup_tools(llm_chat)
@@ -74,7 +74,7 @@ module Captain::ChatHelper
       account_id: resolved_account_id,
       conversation_id: @conversation_id,
       feature_name: feature_name,
-      model: @model,
+      model: model,
       messages: chat ? chat.messages.map { |m| { role: m.role.to_s, content: m.content.to_s } } : @messages,
       temperature: temperature,
       metadata: {
diff --git a/enterprise/app/services/captain/llm/assistant_chat_service.rb b/enterprise/app/services/captain/llm/assistant_chat_service.rb
index 5a2976e39..1184e98ce 100644
--- a/enterprise/app/services/captain/llm/assistant_chat_service.rb
+++ b/enterprise/app/services/captain/llm/assistant_chat_service.rb
@@ -45,4 +45,8 @@ class Captain::Llm::AssistantChatService < Llm::BaseAiService
   def feature_name
     'assistant'
   end
+
+  def account
+    @assistant&.account
+  end
 end
diff --git a/enterprise/app/services/captain/llm/contact_attributes_service.rb b/enterprise/app/services/captain/llm/contact_attributes_service.rb
index 803c06f09..1c7625810 100644
--- a/enterprise/app/services/captain/llm/contact_attributes_service.rb
+++ b/enterprise/app/services/captain/llm/contact_attributes_service.rb
@@ -33,8 +33,8 @@ class Captain::Llm::ContactAttributesService < Llm::BaseAiService
   def instrumentation_params
     {
       span_name: 'llm.captain.contact_attributes',
-      model: @model,
-      temperature: @temperature,
+      model: model,
+      temperature: temperature,
       account_id: @conversation.account_id,
       feature_name: 'contact_attributes',
       messages: [
diff --git a/enterprise/app/services/captain/llm/contact_notes_service.rb b/enterprise/app/services/captain/llm/contact_notes_service.rb
index d37f9fea6..93d9ffddb 100644
--- a/enterprise/app/services/captain/llm/contact_notes_service.rb
+++ b/enterprise/app/services/captain/llm/contact_notes_service.rb
@@ -34,8 +34,8 @@ class Captain::Llm::ContactNotesService < Llm::BaseAiService
   def instrumentation_params
     {
       span_name: 'llm.captain.contact_notes',
-      model: @model,
-      temperature: @temperature,
+      model: model,
+      temperature: temperature,
       account_id: @conversation.account_id,
       feature_name: 'contact_notes',
       messages: [
diff --git a/enterprise/app/services/captain/llm/conversation_faq_service.rb b/enterprise/app/services/captain/llm/conversation_faq_service.rb
index e9152bc99..b9b4832e7 100644
--- a/enterprise/app/services/captain/llm/conversation_faq_service.rb
+++ b/enterprise/app/services/captain/llm/conversation_faq_service.rb
@@ -97,8 +97,8 @@ class Captain::Llm::ConversationFaqService < Llm::BaseAiService
   def instrumentation_params
     {
       span_name: 'llm.captain.conversation_faq',
-      model: @model,
-      temperature: @temperature,
+      model: model,
+      temperature: temperature,
       account_id: @conversation.account_id,
       conversation_id: @conversation.id,
       feature_name: 'conversation_faq',
diff --git a/enterprise/app/services/captain/llm/faq_generator_service.rb b/enterprise/app/services/captain/llm/faq_generator_service.rb
index b22a631b3..435ebe477 100644
--- a/enterprise/app/services/captain/llm/faq_generator_service.rb
+++ b/enterprise/app/services/captain/llm/faq_generator_service.rb
@@ -33,8 +33,8 @@ class Captain::Llm::FaqGeneratorService < Llm::BaseAiService
   def instrumentation_params
     {
       span_name: 'llm.captain.faq_generator',
-      model: @model,
-      temperature: @temperature,
+      model: model,
+      temperature: temperature,
       feature_name: 'faq_generator',
       account_id: @account_id,
       messages: [
diff --git a/enterprise/app/services/captain/onboarding/website_analyzer_service.rb b/enterprise/app/services/captain/onboarding/website_analyzer_service.rb
index a5879ba33..543a728ae 100644
--- a/enterprise/app/services/captain/onboarding/website_analyzer_service.rb
+++ b/enterprise/app/services/captain/onboarding/website_analyzer_service.rb
@@ -72,7 +72,7 @@ class Captain::Onboarding::WebsiteAnalyzerService < Llm::BaseAiService
   def instrumentation_params
     {
       span_name: 'llm.captain.website_analyzer',
-      model: @model,
+      model: model,
       temperature: 0.1,
       feature_name: 'website_analyzer',
       messages: [
diff --git a/enterprise/app/services/llm/base_ai_service.rb b/enterprise/app/services/llm/base_ai_service.rb
index a5a91cf24..58c81453e 100644
--- a/enterprise/app/services/llm/base_ai_service.rb
+++ b/enterprise/app/services/llm/base_ai_service.rb
@@ -2,27 +2,41 @@
 
 # Base service for LLM operations using RubyLLM.
 # New features should inherit from this class.
+#
+# Subclasses should implement:
+# - feature_name: Returns the feature key (e.g., 'assistant', 'copilot') for model lookup
+# - account: Returns the Account instance for per-account model configuration
+#
+# If these methods are not implemented, falls back to InstallationConfig or DEFAULT_MODEL.
 class Llm::BaseAiService
   DEFAULT_MODEL = Llm::Config::DEFAULT_MODEL
   DEFAULT_TEMPERATURE = 1.0
 
-  attr_reader :model, :temperature
+  attr_reader :temperature
 
   def initialize
     Llm::Config.initialize!
-    setup_model
     setup_temperature
   end
 
-  def chat(model: @model, temperature: @temperature)
+  def model
+    @model ||= determine_model
+  end
+
+  def chat(model: self.model, temperature: @temperature)
     RubyLLM.chat(model: model).with_temperature(temperature)
   end
 
   private
 
-  def setup_model
+  def determine_model
+    if respond_to?(:feature_name, true) && respond_to?(:account, true) && account.present?
+      account_model = account.captain_preferences.dig(:models, feature_name.to_s)
+      return account_model if account_model.present?
+    end
+
     config_value = InstallationConfig.find_by(name: 'CAPTAIN_OPEN_AI_MODEL')&.value
-    @model = (config_value.presence || DEFAULT_MODEL)
+    config_value.presence || DEFAULT_MODEL
   end
 
   def setup_temperature
diff --git a/enterprise/lib/enterprise/integrations/openai_processor_service.rb b/enterprise/lib/enterprise/integrations/openai_processor_service.rb
index 5a98ad4c4..1a816fb63 100644
--- a/enterprise/lib/enterprise/integrations/openai_processor_service.rb
+++ b/enterprise/lib/enterprise/integrations/openai_processor_service.rb
@@ -1,7 +1,6 @@
 module Enterprise::Integrations::OpenaiProcessorService
-  ALLOWED_EVENT_NAMES = %w[rephrase summarize reply_suggestion label_suggestion fix_spelling_grammar shorten expand
-                           make_friendly make_formal simplify].freeze
-  CACHEABLE_EVENTS = %w[label_suggestion].freeze
+  ALLOWED_EVENT_NAMES = (Integrations::LlmBaseService::ALLOWED_EVENT_NAMES + Integrations::LlmBaseService::LABEL_SUGGESTION_EVENTS).freeze
+  CACHEABLE_EVENTS = Integrations::LlmBaseService::LABEL_SUGGESTION_EVENTS.freeze
 
   def label_suggestion_message
     payload = label_suggestion_body
@@ -49,7 +48,7 @@ module Enterprise::Integrations::OpenaiProcessorService
 
   def summarize_body
     {
-      model: self.class::GPT_MODEL,
+      model: model_for_event,
       messages: [
         { role: 'system',
           content: prompt_from_file('summary', enterprise: true) },
@@ -65,7 +64,7 @@ module Enterprise::Integrations::OpenaiProcessorService
     return value_from_cache if content.blank?
 
     {
-      model: self.class::GPT_MODEL,
+      model: model_for_event,
       messages: [
         {
           role: 'system',
diff --git a/lib/integrations/llm_base_service.rb b/lib/integrations/llm_base_service.rb
index ca9459fc8..398c9e2f8 100644
--- a/lib/integrations/llm_base_service.rb
+++ b/lib/integrations/llm_base_service.rb
@@ -7,11 +7,25 @@ class Integrations::LlmBaseService
   # 120000 * 4 = 480,000 characters (rounding off downwards to 400,000 to be safe)
   TOKEN_LIMIT = 400_000
   GPT_MODEL = Llm::Config::DEFAULT_MODEL
-  ALLOWED_EVENT_NAMES = %w[rephrase summarize reply_suggestion fix_spelling_grammar shorten expand make_friendly make_formal simplify].freeze
   CACHEABLE_EVENTS = %w[].freeze
 
+  # Maps event names to feature keys in config/llm.yml
+  EDITOR_EVENTS = %w[rephrase fix_spelling_grammar shorten expand make_friendly make_formal simplify].freeze
+  ASSISTANT_EVENTS = %w[summarize reply_suggestion].freeze
+  LABEL_SUGGESTION_EVENTS = %w[label_suggestion].freeze
+
+  ALLOWED_EVENT_NAMES = (EDITOR_EVENTS + ASSISTANT_EVENTS).freeze
+
   pattr_initialize [:hook!, :event!]
 
+  def model_for_event
+    feature = feature_name_for_event
+    return self.class::GPT_MODEL unless feature && hook&.account
+
+    account_model = hook.account.captain_preferences.dig(:models, feature)
+    account_model.presence || self.class::GPT_MODEL
+  end
+
   def perform
     return nil unless valid_event_name?
 
@@ -25,6 +39,14 @@ class Integrations::LlmBaseService
 
   private
 
+  def feature_name_for_event
+    return 'editor' if EDITOR_EVENTS.include?(event_name)
+    return 'assistant' if ASSISTANT_EVENTS.include?(event_name)
+    return 'label_suggestion' if LABEL_SUGGESTION_EVENTS.include?(event_name)
+
+    nil
+  end
+
   def event_name
     event['name']
   end
diff --git a/lib/integrations/openai/processor_service.rb b/lib/integrations/openai/processor_service.rb
index 2f0180701..b589b4674 100644
--- a/lib/integrations/openai/processor_service.rb
+++ b/lib/integrations/openai/processor_service.rb
@@ -53,7 +53,7 @@ class Integrations::Openai::ProcessorService < Integrations::LlmBaseService
 
   def build_api_call_body(system_content, user_content = event['data']['content'])
     {
-      model: GPT_MODEL,
+      model: model_for_event,
       messages: [
         { role: 'system', content: system_content },
         { role: 'user', content: user_content }
@@ -115,7 +115,7 @@ class Integrations::Openai::ProcessorService < Integrations::LlmBaseService
 
   def summarize_body
     {
-      model: GPT_MODEL,
+      model: model_for_event,
       messages: [
         { role: 'system',
           content: prompt_from_file('summary', enterprise: false) },
@@ -126,7 +126,7 @@ class Integrations::Openai::ProcessorService < Integrations::LlmBaseService
 
   def reply_suggestion_body
     {
-      model: GPT_MODEL,
+      model: model_for_event,
       messages: [
         { role: 'system',
           content: prompt_from_file('reply', enterprise: false) }