diff --git a/scripts/tools/backend_config.py b/scripts/tools/backend_config.py
index e34c368..72e7901 100644
--- a/scripts/tools/backend_config.py
+++ b/scripts/tools/backend_config.py
@@ -131,7 +131,7 @@ def detect_gpu(timeout: float = 45.0) -> tuple[bool, str]:
     if not parse_bool(os.environ.get("CNCAPTCHA_STRICT_GPU_DETECT"), True):
         return True, output
 
-    model_name = os.environ.get("CNCAPTCHA_GPU_OCR_MODEL", "PP-OCRv5_server_rec")
+    model_name = os.environ.get("CNCAPTCHA_GPU_OCR_MODEL", "PP-OCRv6_tiny_rec")
     device = os.environ.get("CNCAPTCHA_GPU_OCR_DEVICE", "gpu:0")
     engine = os.environ.get("CNCAPTCHA_GPU_OCR_ENGINE", "paddle_dynamic")
     ocr_probe = (
@@ -206,9 +206,9 @@ def resolve_backend_config(source: str = "env") -> BackendConfig:
             minimum=1,
         ),
         cpu_model=os.environ.get("CNCAPTCHA_CPU_OCR_MODEL", "hybrid"),
-        cpu_fast_model=os.environ.get("CNCAPTCHA_CPU_OCR_FAST_MODEL", "PP-OCRv5_mobile_rec"),
-        cpu_fallback_model=os.environ.get("CNCAPTCHA_CPU_OCR_FALLBACK_MODEL", "PP-OCRv5_server_rec"),
-        gpu_model=os.environ.get("CNCAPTCHA_GPU_OCR_MODEL", "PP-OCRv5_server_rec"),
+        cpu_fast_model=os.environ.get("CNCAPTCHA_CPU_OCR_FAST_MODEL", "PP-OCRv6_tiny_rec"),
+        cpu_fallback_model=os.environ.get("CNCAPTCHA_CPU_OCR_FALLBACK_MODEL", "PP-OCRv6_medium_rec"),
+        gpu_model=os.environ.get("CNCAPTCHA_GPU_OCR_MODEL", "PP-OCRv6_tiny_rec"),
         gpu_device=os.environ.get("CNCAPTCHA_GPU_OCR_DEVICE", "gpu:0"),
         constrained_decode=parse_bool(os.environ.get("CNCAPTCHA_OCR_CONSTRAINED"), True),
         gpu_available=gpu_available,
diff --git a/scripts/tools/ppocr_cpu_pool_worker.py b/scripts/tools/ppocr_cpu_pool_worker.py
index d1a867a..70002dc 100644
--- a/scripts/tools/ppocr_cpu_pool_worker.py
+++ b/scripts/tools/ppocr_cpu_pool_worker.py
@@ -13,7 +13,7 @@ import numpy as np
 
 
 ROOT = Path(__file__).resolve().parents[2]
-MODEL_NAME = os.environ.get("CNCAPTCHA_CPU_OCR_MODEL", "PP-OCRv5_server_rec")
+MODEL_NAME = os.environ.get("CNCAPTCHA_CPU_OCR_MODEL", "PP-OCRv6_tiny_rec")
 ENGINE = os.environ.get("CNCAPTCHA_CPU_OCR_ENGINE", "paddle_dynamic")
 WORKERS = int(os.environ.get("CNCAPTCHA_CPU_OCR_WORKERS", "3"))
 CACHE_NAME = os.environ.get("CNCAPTCHA_CPU_PADDLEX_CACHE", ".paddlex_cache_cpu")