TriliumNext · Halone228 · May 31, 2026 · May 31, 2026 · May 31, 2026
diff --git a/apps/client/src/translations/en/translation.json b/apps/client/src/translations/en/translation.json
@@ -2689,6 +2689,10 @@
     "base_url": "Base URL",
     "base_url_description": "Optional. Override the default API endpoint — useful for self-hosted models (Ollama, LM Studio, vLLM) or proxies.",
     "base_url_invalid": "Base URL must be a valid http:// or https:// URL",
+    "model": "Model",
+    "model_description": "Optional. Specify a model ID to use with this provider (e.g. gpt-4.1, claude-sonnet-4). Falls back to the provider default if left blank.",
+    "model_placeholder": "e.g. gpt-4.1",
+    "default_model": "Default",
     "cancel": "Cancel",
     "mcp_title": "MCP (Model Context Protocol)",
     "mcp_enabled": "MCP server",

diff --git a/apps/client/src/translations/ru/translation.json b/apps/client/src/translations/ru/translation.json
@@ -2466,7 +2466,11 @@
     "mcp_endpoint_description": "Добавьте этот URL в настройки MCP вашего ИИ-ассистента",
     "base_url_invalid": "Базовый URL должен быть допустимым URL-адресом http:// или https://",
     "base_url_description": "(опционально) Переопределите конечную точку API по умолчанию — полезно для локальных провайдеров (Ollama, LM Studio, vLLM) или прокси-серверов.",
-    "base_url": "Базовый URL"
+    "base_url": "Базовый URL",
+    "model": "Модель",
+    "model_description": "Опционально. Укажите идентификатор модели для этого провайдера (например, gpt-4.1, claude-sonnet-4). Если не задано, будет использована модель по умолчанию.",
+    "model_placeholder": "например, gpt-4.1",
+    "default_model": "По умолчанию"
   },
   "database": {
     "title": "База данных"

diff --git a/apps/client/src/widgets/type_widgets/options/llm.tsx b/apps/client/src/widgets/type_widgets/options/llm.tsx
@@ -136,6 +136,7 @@ function ProviderList({ providers, onDelete }: ProviderListProps) {
                     <tr>
                         <th>{t("llm.provider_name")}</th>
                         <th>{t("llm.provider_type")}</th>
+                        <th>{t("llm.model")}</th>
                         <th>{t("llm.actions")}</th>
                     </tr>
                 </thead>
@@ -146,6 +147,7 @@ function ProviderList({ providers, onDelete }: ProviderListProps) {
                             <tr key={provider.id}>
                                 <td>{provider.name}</td>
                                 <td>{providerType?.name || provider.provider}</td>
+                                <td>{provider.model || <em className="text-muted">{t("llm.default_model")}</em>}</td>
                                 <td>
                                     <ActionButton
                                         icon="bx bx-trash"

diff --git a/apps/client/src/widgets/type_widgets/options/llm/AddProviderModal.tsx b/apps/client/src/widgets/type_widgets/options/llm/AddProviderModal.tsx
@@ -12,6 +12,7 @@ export interface LlmProviderConfig {
     provider: string;
     apiKey: string;
     baseURL?: string;
+    model?: string;
 }
 
 export interface ProviderType {
@@ -48,6 +49,7 @@ export default function AddProviderModal({ show, onHidden, onSave }: AddProvider
     const [selectedProvider, setSelectedProvider] = useState(PROVIDER_TYPES[0].id);
     const [apiKey, setApiKey] = useState("");
     const [baseUrl, setBaseUrl] = useState("");
+    const [model, setModel] = useState("");
     const formRef = useRef<HTMLFormElement>(null);
 
     const providerType = useMemo(
@@ -63,12 +65,14 @@ export default function AddProviderModal({ show, onHidden, onSave }: AddProvider
             return;
         }
 
+        const trimmedModel = model.trim();
         const newProvider: LlmProviderConfig = {
             id: `${selectedProvider}_${Date.now()}`,
             name: providerType?.name || selectedProvider,
             provider: selectedProvider,
             apiKey: apiKey.trim(),
-            ...(trimmedBaseUrl && { baseURL: trimmedBaseUrl })
+            ...(trimmedBaseUrl && { baseURL: trimmedBaseUrl }),
+            ...(trimmedModel && { model: trimmedModel })
         };
 
         onSave(newProvider);
@@ -80,6 +84,7 @@ export default function AddProviderModal({ show, onHidden, onSave }: AddProvider
         setSelectedProvider(PROVIDER_TYPES[0].id);
         setApiKey("");
         setBaseUrl("");
+        setModel("");
     }
 
     function handleCancel() {
@@ -134,6 +139,19 @@ export default function AddProviderModal({ show, onHidden, onSave }: AddProvider
                 />
             </FormGroup>
 
+            <FormGroup
+                name="model"
+                label={t("llm.model")}
+                description={t("llm.model_description")}
+            >
+                <FormTextBox
+                    type="text"
+                    currentValue={model}
+                    onChange={setModel}
+                    placeholder={t("llm.model_placeholder")}
+                />
+            </FormGroup>
+
             <FormGroup name="api-key" label={t("llm.api_key")}>
                 <FormTextBox
                     type="password"

diff --git a/apps/server/src/routes/api/llm_chat.spec.ts b/apps/server/src/routes/api/llm_chat.spec.ts
@@ -12,6 +12,7 @@ const state = vi.hoisted(() => ({
 vi.mock("../../services/llm/index.js", () => ({
     hasConfiguredProviders: () => state.configured,
     getAllModels: () => state.models,
+    getProviderSetupByType: () => undefined,
     getProviderByType: () => ({
         chat: () => { if (state.chatThrows) throw new Error("provider exploded"); return {}; },
         getAvailableModels: () => state.availableModels,

diff --git a/apps/server/src/routes/api/llm_chat.ts b/apps/server/src/routes/api/llm_chat.ts
@@ -2,7 +2,7 @@ import type { LlmMessage } from "@triliumnext/commons";
 import type { Request, Response } from "express";
 
 import { generateChatTitle } from "../../services/llm/chat_title.js";
-import { getAllModels, getProviderByType, hasConfiguredProviders, type LlmProviderConfig } from "../../services/llm/index.js";
+import { getAllModels, getProviderByType, getProviderSetupByType, hasConfiguredProviders, type LlmProviderConfig } from "../../services/llm/index.js";
 import { streamToChunks } from "../../services/llm/stream.js";
 import { getLog } from "@triliumnext/core";
 import { safeExtractMessageAndStackFromError } from "../../services/utils.js";
@@ -51,10 +51,12 @@ async function streamChat(req: Request, res: Response) {
         }
 
         const provider = getProviderByType(config.provider || "anthropic");
-        const result = provider.chat(messages, config);
+        const setup = getProviderSetupByType(config.provider || "anthropic");
+        const effectiveModel = config.model || setup?.model;
+        const result = provider.chat(messages, { ...config, model: effectiveModel });
 
         // Get pricing and display name for the model
-        const modelId = config.model || provider.getAvailableModels().find(m => m.isDefault)?.id;
+        const modelId = effectiveModel || provider.getAvailableModels().find(m => m.isDefault)?.id;
         if (!modelId) {
             res.write(`data: ${JSON.stringify({ type: "error", error: "No model specified and no default model available for the provider." })}\n\n`);
             return;

diff --git a/apps/server/src/services/llm/index.spec.ts b/apps/server/src/services/llm/index.spec.ts
@@ -36,6 +36,7 @@ import {
     getAllModels,
     getProvider,
     getProviderByType,
+    getProviderSetupByType,
     hasConfiguredProviders
 } from "./index.js";
 
@@ -158,5 +159,46 @@ describe("llm/index provider registry", () => {
             expect(getAllModels()).toEqual([]);
             expect(errorMock).toHaveBeenCalled();
         });
+
+        it("injects a configured custom model as default when it is not in the provider list", () => {
+            setProviders([
+                { id: "a1", name: "A1", provider: "anthropic", apiKey: "k1", model: "custom-model" }
+            ]);
+            const models = getAllModels();
+            expect(models).toHaveLength(2);
+            expect(models[0]).toEqual({
+                id: "custom-model",
+                name: "custom-model",
+                provider: "anthropic",
+                pricing: { input: 0, output: 0 },
+                isDefault: true
+            });
+        });
+
+        it("marks an existing model as default when it matches the configured model", () => {
+            setProviders([
+                { id: "a1", name: "A1", provider: "anthropic", apiKey: "k1", model: "anthropic-model" }
+            ]);
+            const models = getAllModels();
+            expect(models).toHaveLength(1);
+            expect(models[0]).toMatchObject({
+                id: "anthropic-model",
+                provider: "anthropic",
+                isDefault: true
+            });
+        });
+    });
+
+    describe("getProviderSetupByType", () => {
+        it("returns the setup for the first provider of the given type", () => {
+            setProviders(TWO);
+            const setup = getProviderSetupByType("openai");
+            expect(setup).toMatchObject({ id: "o1", provider: "openai" });
+        });
+
+        it("returns undefined when no provider of that type exists", () => {
+            setProviders(TWO);
+            expect(getProviderSetupByType("google")).toBeUndefined();
+        });
     });
 });
diff --git a/apps/server/src/services/llm/index.ts b/apps/server/src/services/llm/index.ts
@@ -16,6 +16,8 @@ export interface LlmProviderSetup {
     apiKey: string;
     /** Optional override for the SDK's default API endpoint (e.g. for self-hosted Ollama, vLLM, or proxies). */
     baseURL?: string;
+    /** Optional model ID to use instead of the provider default. */
+    model?: string;
 }
 
 /** Factory functions for creating provider instances */
@@ -94,6 +96,14 @@ export function getProviderByType(providerType: string): LlmProvider {
     return getProvider(config.id);
 }
 
+/**
+ * Get the setup config for the first configured provider of a specific type.
+ */
+export function getProviderSetupByType(providerType: string): LlmProviderSetup | undefined {
+    const configs = getConfiguredProviders();
+    return configs.find(c => c.provider === providerType);
+}
+
 /**
  * Check if any providers are configured.
  */
@@ -119,8 +129,31 @@ export function getAllModels(): ModelInfo[] {
         try {
             const provider = getProvider(config.id);
             const models = provider.getAvailableModels();
-            for (const model of models) {
-                allModels.push({ ...model, provider: config.provider });
+            const mergedModels = models.map(m => ({ ...m, provider: config.provider }));
+
+            if (config.model) {
+                const existingIndex = mergedModels.findIndex(m => m.id === config.model);
+                if (existingIndex >= 0) {
+                    mergedModels[existingIndex] = { ...mergedModels[existingIndex], isDefault: true };
+                } else {
+                    mergedModels.unshift({
+                        id: config.model,
+                        name: config.model,
+                        provider: config.provider,
+                        pricing: { input: 0, output: 0 },
+                        isDefault: true
+                    });
+                }
+                // Ensure only the configured model is the default
+                for (let i = 0; i < mergedModels.length; i++) {
+                    if (mergedModels[i].isDefault && mergedModels[i].id !== config.model) {
+                        mergedModels[i] = { ...mergedModels[i], isDefault: false };
+                    }
+                }
+            }
+
+            for (const model of mergedModels) {
+                allModels.push(model);
             }
         } catch (e) {
             getLog().error(`Failed to get models from provider ${config.provider}: ${e}`);