diff --git a/src/modules/aifn/autosuggestions/autoSuggestions.ts b/src/modules/aifn/autosuggestions/autoSuggestions.ts
index be2336618..74c7953a6 100644
--- a/src/modules/aifn/autosuggestions/autoSuggestions.ts
+++ b/src/modules/aifn/autosuggestions/autoSuggestions.ts
@@ -83,7 +83,7 @@ export function autoSuggestions(conversationId: string, assistantMessageId: stri
 
   // Follow-up: Auto-Diagrams
   if (suggestDiagrams) {
-    void llmChatGenerateOrThrow(funcLLMId, [
+    llmChatGenerateOrThrow(funcLLMId, [
         { role: 'system', content: systemMessage.text },
         { role: 'user', content: userMessage.text },
         { role: 'assistant', content: assistantMessageText },
@@ -110,7 +110,8 @@ export function autoSuggestions(conversationId: string, assistantMessageId: stri
         }
       }
     }).catch(err => {
-      console.error('autoSuggestions::diagram:', err);
+      // Likely the model did not support function calling
+      // console.log('autoSuggestions: diagram error:', err);
     });
   }
 
diff --git a/src/modules/llms/llm.client.ts b/src/modules/llms/llm.client.ts
index 3a6bf5804..580e4b8cb 100644
--- a/src/modules/llms/llm.client.ts
+++ b/src/modules/llms/llm.client.ts
@@ -5,7 +5,7 @@ import { hasGoogleAnalytics } from '~/common/components/GoogleAnalytics';
 import type { ModelDescriptionSchema } from './server/llm.server.types';
 import type { OpenAIWire } from './server/openai/openai.wiretypes';
 import type { StreamingClientUpdate } from './vendors/unifiedStreamingClient';
-import { DLLM, DLLMId, DModelSource, DModelSourceId, LLM_IF_OAI_Chat, useModelsStore } from './store-llms';
+import { DLLM, DLLMId, DModelSource, DModelSourceId, LLM_IF_OAI_Chat, LLM_IF_OAI_Fn, useModelsStore } from './store-llms';
 import { FALLBACK_LLM_TEMPERATURE } from './vendors/openai/openai.vendor';
 import { findAccessForSourceOrThrow, findVendorForLlmOrThrow } from './vendors/vendors.registry';
 
@@ -129,6 +129,10 @@ export async function llmChatGenerateOrThrow<TSourceSetup = unknown, TAccess = u
   // id to DLLM and vendor
   const { llm, vendor } = findVendorForLlmOrThrow<TSourceSetup, TAccess, TLLMOptions>(llmId);
 
+  // if the model does not support function calling and we're trying to force a function, throw
+  if (forceFunctionName && !llm.interfaces.includes(LLM_IF_OAI_Fn))
+    throw new Error(`Model ${llmId} does not support function calling`);
+
   // FIXME: relax the forced cast
   const options = llm.options as TLLMOptions;
 
diff --git a/src/modules/llms/server/openai/models.data.ts b/src/modules/llms/server/openai/models.data.ts
index 57400f69d..0cf234174 100644
--- a/src/modules/llms/server/openai/models.data.ts
+++ b/src/modules/llms/server/openai/models.data.ts
@@ -386,7 +386,7 @@ const _knownMistralChatModels: ManualMappings = [
     label: 'Codestral (2405)',
     description: 'Designed and optimized for code generation tasks.',
     contextWindow: 32768,
-    interfaces: [LLM_IF_OAI_Chat, LLM_IF_OAI_Fn],
+    interfaces: [LLM_IF_OAI_Chat],
     pricing: { chatIn: 1, chatOut: 3 },
   },
   {
@@ -397,7 +397,7 @@ const _knownMistralChatModels: ManualMappings = [
     // copied
     description: 'Designed and optimized for code generation tasks.',
     contextWindow: 32768,
-    interfaces: [LLM_IF_OAI_Chat, LLM_IF_OAI_Fn],
+    interfaces: [LLM_IF_OAI_Chat],
     pricing: { chatIn: 1, chatOut: 3 },
   },
 
@@ -430,7 +430,7 @@ const _knownMistralChatModels: ManualMappings = [
     label: 'Open Mixtral 8x22B (2404)',
     description: 'Mixtral 8x22B model',
     contextWindow: 65536,
-    interfaces: [LLM_IF_OAI_Chat],
+    interfaces: [LLM_IF_OAI_Chat, LLM_IF_OAI_Fn],
     pricing: { chatIn: 2, chatOut: 6 },
   },
   {
@@ -441,7 +441,7 @@ const _knownMistralChatModels: ManualMappings = [
     // copied
     description: 'Mixtral 8x22B model',
     contextWindow: 65536,
-    interfaces: [LLM_IF_OAI_Chat],
+    interfaces: [LLM_IF_OAI_Chat, LLM_IF_OAI_Fn],
     pricing: { chatIn: 2, chatOut: 6 },
   },
   // Medium (Deprecated)