diff --git a/src/posix/README.md b/src/posix/README.md
index af913ab22..650db4b0b 100644
--- a/src/posix/README.md
+++ b/src/posix/README.md
@@ -139,7 +139,7 @@ To build and program the device with RCP application, complete the following ste
 #### Run
 
 ```sh
-./build/posix/src/posix/ot-cli 'spinel+hdlc+uart:///dev/ttyACM0?uart-baudrate=115200'
+./build/posix/src/posix/ot-cli 'spinel+hdlc+uart:///dev/ttyACM0?uart-baudrate=460800'
 ```
 
 ## Daemon Mode
@@ -152,7 +152,7 @@ OpenThread Posix Daemon mode uses a unix socket as input and output, so that Ope
 # Daemon with simulation
 ./build/posix/src/posix/ot-daemon 'spinel+hdlc+forkpty://build/simulation/examples/apps/ncp/ot-rcp?forkpty-arg=1'
 # Daemon with real device
-./build/posix/src/posix/ot-daemon 'spinel+hdlc+uart:///dev/ttyACM0?uart-baudrate=115200'
+./build/posix/src/posix/ot-daemon 'spinel+hdlc+uart:///dev/ttyACM0?uart-baudrate=460800'
 # Built-in controller
 ./build/posix/src/posix/ot-ctl
 ```
diff --git a/src/posix/platform/hdlc_interface.cpp b/src/posix/platform/hdlc_interface.cpp
index 321bfbae2..8bf4043e9 100644
--- a/src/posix/platform/hdlc_interface.cpp
+++ b/src/posix/platform/hdlc_interface.cpp
@@ -465,7 +465,7 @@ int HdlcInterface::OpenFile(const Url::Url &aRadioUrl)
         const char    *value;
         speed_t        speed;
         uint8_t        stopBit  = 1;
-        uint32_t       baudrate = 115200;
+        uint32_t       baudrate = 460800;
 
         VerifyOrExit((rval = tcgetattr(fd, &tios)) == 0);
 
diff --git a/src/posix/platform/radio_url.cpp b/src/posix/platform/radio_url.cpp
index e86990bd7..aef8f5b7e 100644
--- a/src/posix/platform/radio_url.cpp
+++ b/src/posix/platform/radio_url.cpp
@@ -81,7 +81,7 @@ const char *otSysGetRadioUrlHelpString(void)
     "Parameters:\n"                                                                                  \
     "    uart-parity[=even|odd]         Uart parity config, optional.\n"                             \
     "    uart-stop[=number-of-bits]     Uart stop bit, default is 1.\n"                              \
-    "    uart-baudrate[=baudrate]       Uart baud rate, default is 115200.\n"                        \
+    "    uart-baudrate[=baudrate]       Uart baud rate, default is 460800.\n"                        \
     "    uart-flow-control              Enable flow control, disabled by default.\n"                 \
     "    uart-init-deassert             Deassert lines on init when flow control is disabled.\n"     \
     "    uart-reset                     Reset connection after hard resetting RCP(USB CDC ACM).\n"   \
diff --git a/tests/scripts/misc/test_rcp_reset.py b/tests/scripts/misc/test_rcp_reset.py
index 3b9a37b44..c17856187 100644
--- a/tests/scripts/misc/test_rcp_reset.py
+++ b/tests/scripts/misc/test_rcp_reset.py
@@ -40,7 +40,7 @@ def main():
 
     args = parser.parse_args()
 
-    stream = StreamOpen('p', f'{args.rcp} 1', False, 115200, False)
+    stream = StreamOpen('p', f'{args.rcp} 1', False, 460800, False)
     wpan_api = WpanApi(stream, 1)
 
     assert wpan_api.prop_set_value(SPINEL.PROP_PHY_ENABLED, 1) == 1
diff --git a/tests/unit/test_url.cpp b/tests/unit/test_url.cpp
index a7ff34d50..63c2e88cf 100644
--- a/tests/unit/test_url.cpp
+++ b/tests/unit/test_url.cpp
@@ -36,13 +36,13 @@ namespace Url {
 
 void TestSimple(void)
 {
-    char url[] = "spinel:///dev/ttyUSB0?baudrate=115200";
+    char url[] = "spinel:///dev/ttyUSB0?baudrate=460800";
     Url  args;
 
     VerifyOrQuit(!args.Init(url));
 
     VerifyOrQuit(!strcmp(args.GetPath(), "/dev/ttyUSB0"));
-    VerifyOrQuit(!strcmp(args.GetValue("baudrate"), "115200"));
+    VerifyOrQuit(!strcmp(args.GetValue("baudrate"), "460800"));
     VerifyOrQuit(args.GetValue("not-exists") == nullptr);
     VerifyOrQuit(args.GetValue("last-value-wrong-position", url) == nullptr);
     VerifyOrQuit(args.GetValue("last-value-before-url", url - 1) == nullptr);
@@ -67,7 +67,7 @@ void TestSimpleNoQueryString(void)
 
 void TestEmptyValue(void)
 {
-    char        url[] = "spinel:///dev/ttyUSB0?rtscts&baudrate=115200&verbose&verbose&verbose";
+    char        url[] = "spinel:///dev/ttyUSB0?rtscts&baudrate=460800&verbose&verbose&verbose";
     Url         args;
     const char *arg = nullptr;
 
@@ -85,12 +85,12 @@ void TestEmptyValue(void)
 
 void TestMultipleProtocols(void)
 {
-    char url[] = "spinel+spi:///dev/ttyUSB0?baudrate=115200";
+    char url[] = "spinel+spi:///dev/ttyUSB0?baudrate=460800";
     Url  args;
 
     VerifyOrQuit(!args.Init(url));
     VerifyOrQuit(!strcmp(args.GetPath(), "/dev/ttyUSB0"));
-    VerifyOrQuit(!strcmp(args.GetValue("baudrate"), "115200"));
+    VerifyOrQuit(!strcmp(args.GetValue("baudrate"), "460800"));
 
     printf("PASS %s\r\n", __func__);
 }