diff --git a/.env.example b/.env.example
index 430dc0d..e437aab 100644
--- a/.env.example
+++ b/.env.example
@@ -16,9 +16,9 @@ MINI_APP_ALLOWED_ORIGINS=http://localhost:5173
 
 # Parsing / AI
 OPENAI_API_KEY=your-openai-api-key
-PARSER_MODEL=gpt-4.1-mini
-PURCHASE_PARSER_MODEL=gpt-5-mini
-ASSISTANT_MODEL=gpt-5-mini
+PARSER_MODEL=gpt-4o-mini
+PURCHASE_PARSER_MODEL=gpt-4o-mini
+ASSISTANT_MODEL=gpt-4o-mini
 ASSISTANT_TIMEOUT_MS=20000
 ASSISTANT_MEMORY_MAX_TURNS=12
 ASSISTANT_RATE_LIMIT_BURST=5
diff --git a/apps/bot/src/config.ts b/apps/bot/src/config.ts
index eb2c51a..1074964 100644
--- a/apps/bot/src/config.ts
+++ b/apps/bot/src/config.ts
@@ -127,10 +127,10 @@ export function getBotRuntimeConfig(env: NodeJS.ProcessEnv = process.env): BotRu
     miniAppAuthEnabled,
     schedulerOidcAllowedEmails,
     reminderJobsEnabled,
-    parserModel: env.PARSER_MODEL?.trim() || 'gpt-4.1-mini',
+    parserModel: env.PARSER_MODEL?.trim() || 'gpt-4o-mini',
     purchaseParserModel:
-      env.PURCHASE_PARSER_MODEL?.trim() || env.PARSER_MODEL?.trim() || 'gpt-5-mini',
-    assistantModel: env.ASSISTANT_MODEL?.trim() || 'gpt-5-mini',
+      env.PURCHASE_PARSER_MODEL?.trim() || env.PARSER_MODEL?.trim() || 'gpt-4o-mini',
+    assistantModel: env.ASSISTANT_MODEL?.trim() || 'gpt-4o-mini',
     assistantTimeoutMs: parsePositiveInteger(
       env.ASSISTANT_TIMEOUT_MS,
       20_000,
diff --git a/infra/terraform/terraform.tfvars.example b/infra/terraform/terraform.tfvars.example
index 83246f0..a256023 100644
--- a/infra/terraform/terraform.tfvars.example
+++ b/infra/terraform/terraform.tfvars.example
@@ -11,9 +11,9 @@ mini_app_image  = "europe-west1-docker.pkg.dev/my-gcp-project/household-bot/mini
 database_url_secret_id   = "database-url"
 telegram_bot_token_secret_id = "telegram-bot-token"
 openai_api_key_secret_id = "openai-api-key"
-bot_parser_model             = "gpt-4.1-mini"
-bot_purchase_parser_model    = "gpt-5-mini"
-bot_assistant_model          = "gpt-5-mini"
+bot_parser_model             = "gpt-4o-mini"
+bot_purchase_parser_model    = "gpt-4o-mini"
+bot_assistant_model          = "gpt-4o-mini"
 bot_assistant_timeout_ms     = 20000
 bot_assistant_memory_max_turns = 12
 bot_assistant_rate_limit_burst = 5
diff --git a/packages/config/src/env.ts b/packages/config/src/env.ts
index e2a2ecb..88b3755 100644
--- a/packages/config/src/env.ts
+++ b/packages/config/src/env.ts
@@ -31,9 +31,9 @@ const server = {
     .optional()
     .transform((value) => parseOptionalCsv(value)),
   OPENAI_API_KEY: z.string().min(1).optional(),
-  PARSER_MODEL: z.string().min(1).default('gpt-4.1-mini'),
-  PURCHASE_PARSER_MODEL: z.string().min(1).default('gpt-5-mini'),
-  ASSISTANT_MODEL: z.string().min(1).default('gpt-5-mini'),
+  PARSER_MODEL: z.string().min(1).default('gpt-4o-mini'),
+  PURCHASE_PARSER_MODEL: z.string().min(1).default('gpt-4o-mini'),
+  ASSISTANT_MODEL: z.string().min(1).default('gpt-4o-mini'),
   ASSISTANT_TIMEOUT_MS: z.coerce.number().int().positive().default(20000),
   ASSISTANT_MEMORY_MAX_TURNS: z.coerce.number().int().positive().default(12),
   ASSISTANT_RATE_LIMIT_BURST: z.coerce.number().int().positive().default(5),