diff --git a/keyboards/ai03/altair/config.h b/keyboards/ai03/altair/config.h
new file mode 100644
index 0000000000..c54b35498b
--- /dev/null
+++ b/keyboards/ai03/altair/config.h
@@ -0,0 +1,12 @@
+/* Copyright 2024 ai03 Design Studio */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#pragma once
+
+/* VBUS-routed pin for upstream detection */
+#define USB_VBUS_PIN GP0
+
+/* RP2040- and hardware-specific config */
+#define RP2040_BOOTLOADER_DOUBLE_TAP_RESET
+#define RP2040_BOOTLOADER_DOUBLE_TAP_RESET_TIMEOUT 500U
+#define PICO_XOSC_STARTUP_DELAY_MULTIPLIER 64
diff --git a/keyboards/ai03/altair/keyboard.json b/keyboards/ai03/altair/keyboard.json
new file mode 100644
index 0000000000..9626716cde
--- /dev/null
+++ b/keyboards/ai03/altair/keyboard.json
@@ -0,0 +1,118 @@
+{
+ "manufacturer": "ai03 Design Studio",
+ "keyboard_name": "Altair",
+ "maintainer": "ai03_2725",
+ "bootloader": "rp2040",
+ "build": {
+ "debounce_type": "asym_eager_defer_pk"
+ },
+ "diode_direction": "COL2ROW",
+ "dynamic_keymap": {
+ "layer_count": 6
+ },
+ "features": {
+ "bootmagic": true,
+ "command": false,
+ "console": false,
+ "extrakey": true,
+ "mousekey": true,
+ "nkro": true
+ },
+ "matrix_pins": {
+ "cols": ["GP20", "GP19", "GP18", "GP17", "GP16", "GP21", "GP9"],
+ "rows": ["GP11", "GP26", "GP27", "GP28", "GP10"]
+ },
+ "processor": "RP2040",
+ "split": {
+ "bootmagic": {
+ "matrix": [5, 0]
+ },
+ "enabled": true,
+ "handedness": {
+ "pin": "GP8"
+ },
+ "matrix_pins": {
+ "right": {
+ "cols": ["GP15", "GP21", "GP9", "GP13", "GP10", "GP11", "GP12"],
+ "rows": ["GP5", "GP16", "GP20", "GP28", "GP14"]
+ }
+ },
+ "soft_serial_pin": "GP29"
+ },
+ "url": "https://ai03.com/",
+ "usb": {
+ "device_version": "0.0.1",
+ "pid": "0x0022",
+ "vid": "0xA103"
+ },
+ "layouts": {
+ "LAYOUT": {
+ "layout": [
+ {"matrix": [0, 0], "x": 0, "y": 0.38},
+ {"matrix": [0, 1], "x": 1, "y": 0.38},
+ {"matrix": [0, 2], "x": 2, "y": 0.13},
+ {"matrix": [0, 3], "x": 3, "y": 0},
+ {"matrix": [0, 4], "x": 4, "y": 0.13},
+ {"matrix": [0, 5], "x": 5, "y": 0.25},
+ {"matrix": [0, 6], "x": 6, "y": 0.5},
+ {"matrix": [5, 0], "x": 7.75, "y": 0.5},
+ {"matrix": [5, 1], "x": 8.75, "y": 0.25},
+ {"matrix": [5, 2], "x": 9.75, "y": 0.13},
+ {"matrix": [5, 3], "x": 10.75, "y": 0},
+ {"matrix": [5, 4], "x": 11.75, "y": 0.13},
+ {"matrix": [5, 5], "x": 12.75, "y": 0.38},
+ {"matrix": [5, 6], "x": 13.75, "y": 0.38},
+ {"matrix": [1, 0], "x": 0, "y": 1.38},
+ {"matrix": [1, 1], "x": 1, "y": 1.38},
+ {"matrix": [1, 2], "x": 2, "y": 1.13},
+ {"matrix": [1, 3], "x": 3, "y": 1},
+ {"matrix": [1, 4], "x": 4, "y": 1.13},
+ {"matrix": [1, 5], "x": 5, "y": 1.25},
+ {"matrix": [1, 6], "x": 6, "y": 1.5},
+ {"matrix": [6, 0], "x": 7.75, "y": 1.5},
+ {"matrix": [6, 1], "x": 8.75, "y": 1.25},
+ {"matrix": [6, 2], "x": 9.75, "y": 1.13},
+ {"matrix": [6, 3], "x": 10.75, "y": 1},
+ {"matrix": [6, 4], "x": 11.75, "y": 1.13},
+ {"matrix": [6, 5], "x": 12.75, "y": 1.38},
+ {"matrix": [6, 6], "x": 13.75, "y": 1.38},
+ {"matrix": [2, 0], "x": 0, "y": 2.38},
+ {"matrix": [2, 1], "x": 1, "y": 2.38},
+ {"matrix": [2, 2], "x": 2, "y": 2.13},
+ {"matrix": [2, 3], "x": 3, "y": 2},
+ {"matrix": [2, 4], "x": 4, "y": 2.13},
+ {"matrix": [2, 5], "x": 5, "y": 2.25},
+ {"matrix": [2, 6], "x": 6, "y": 2.5},
+ {"matrix": [7, 0], "x": 7.75, "y": 2.5},
+ {"matrix": [7, 1], "x": 8.75, "y": 2.25},
+ {"matrix": [7, 2], "x": 9.75, "y": 2.13},
+ {"matrix": [7, 3], "x": 10.75, "y": 2},
+ {"matrix": [7, 4], "x": 11.75, "y": 2.13},
+ {"matrix": [7, 5], "x": 12.75, "y": 2.38},
+ {"matrix": [7, 6], "x": 13.75, "y": 2.38},
+ {"matrix": [3, 0], "x": 0, "y": 3.38},
+ {"matrix": [3, 1], "x": 1, "y": 3.38},
+ {"matrix": [3, 2], "x": 2, "y": 3.13},
+ {"matrix": [3, 3], "x": 3, "y": 3},
+ {"matrix": [3, 4], "x": 4, "y": 3.13},
+ {"matrix": [3, 5], "x": 5, "y": 3.25},
+ {"matrix": [3, 6], "x": 6, "y": 3.5},
+ {"matrix": [8, 0], "x": 7.75, "y": 3.5},
+ {"matrix": [8, 1], "x": 8.75, "y": 3.25},
+ {"matrix": [8, 2], "x": 9.75, "y": 3.13},
+ {"matrix": [8, 3], "x": 10.75, "y": 3},
+ {"matrix": [8, 4], "x": 11.75, "y": 3.13},
+ {"matrix": [8, 5], "x": 12.75, "y": 3.38},
+ {"matrix": [8, 6], "x": 13.75, "y": 3.38},
+ {"matrix": [4, 3], "x": 2.71, "y": 4.13},
+ {"matrix": [4, 4], "x": 3.73, "y": 4.16},
+ {"matrix": [4, 5], "x": 4.74, "y": 4.36},
+ {"matrix": [4, 6], "x": 5.75, "y": 4.72},
+ {"matrix": [9, 0], "x": 8, "y": 4.72},
+ {"matrix": [9, 1], "x": 9.02, "y": 4.36},
+ {"matrix": [9, 2], "x": 10.03, "y": 4.18},
+ {"matrix": [9, 3], "x": 11.05, "y": 4.13}
+ ]
+ }
+ }
+}
diff --git a/keyboards/ai03/altair/keymaps/default/keymap.c b/keyboards/ai03/altair/keymaps/default/keymap.c
new file mode 100644
index 0000000000..038b2b823d
--- /dev/null
+++ b/keyboards/ai03/altair/keymaps/default/keymap.c
@@ -0,0 +1,24 @@
+/* Copyright 2024 ai03 Design Studio */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+ [0] = LAYOUT(
+ KC_ESC, KC_1, KC_2, KC_3, KC_4, KC_5, KC_MINS, KC_EQL, KC_6, KC_7, KC_8, KC_9, KC_0, KC_BSPC,
+ KC_CAPS, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_LBRC, KC_RBRC, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_BSLS,
+ KC_LCTL, KC_A, KC_S, KC_D, KC_F, KC_G, KC_LPRN, KC_RPRN, KC_H, KC_J, KC_K, KC_L, KC_SCLN, KC_QUOT,
+ KC_LSFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_GRV, KC_PSCR, KC_N, KC_M, KC_COMM, KC_DOT, KC_SLSH, KC_ENT,
+ KC_LGUI, KC_LALT, MO(1), KC_SPC, KC_SPC, MO(1), KC_TAB, KC_DEL
+ ),
+
+ [1] = LAYOUT(
+ _______, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, KC_F11, KC_F12, _______,
+ _______, _______, _______, KC_PGUP, _______, _______, _______, _______, _______, _______, KC_UP, _______, _______, _______,
+ _______, _______, KC_HOME, KC_PGDN, KC_END, _______, _______, _______, _______, KC_LEFT, KC_DOWN, KC_RGHT, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______
+ )
+
+};
diff --git a/keyboards/ai03/altair/keymaps/via/keymap.c b/keyboards/ai03/altair/keymaps/via/keymap.c
new file mode 100644
index 0000000000..038b2b823d
--- /dev/null
+++ b/keyboards/ai03/altair/keymaps/via/keymap.c
@@ -0,0 +1,24 @@
+/* Copyright 2024 ai03 Design Studio */
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+ [0] = LAYOUT(
+ KC_ESC, KC_1, KC_2, KC_3, KC_4, KC_5, KC_MINS, KC_EQL, KC_6, KC_7, KC_8, KC_9, KC_0, KC_BSPC,
+ KC_CAPS, KC_Q, KC_W, KC_E, KC_R, KC_T, KC_LBRC, KC_RBRC, KC_Y, KC_U, KC_I, KC_O, KC_P, KC_BSLS,
+ KC_LCTL, KC_A, KC_S, KC_D, KC_F, KC_G, KC_LPRN, KC_RPRN, KC_H, KC_J, KC_K, KC_L, KC_SCLN, KC_QUOT,
+ KC_LSFT, KC_Z, KC_X, KC_C, KC_V, KC_B, KC_GRV, KC_PSCR, KC_N, KC_M, KC_COMM, KC_DOT, KC_SLSH, KC_ENT,
+ KC_LGUI, KC_LALT, MO(1), KC_SPC, KC_SPC, MO(1), KC_TAB, KC_DEL
+ ),
+
+ [1] = LAYOUT(
+ _______, KC_F1, KC_F2, KC_F3, KC_F4, KC_F5, KC_F6, KC_F7, KC_F8, KC_F9, KC_F10, KC_F11, KC_F12, _______,
+ _______, _______, _______, KC_PGUP, _______, _______, _______, _______, _______, _______, KC_UP, _______, _______, _______,
+ _______, _______, KC_HOME, KC_PGDN, KC_END, _______, _______, _______, _______, KC_LEFT, KC_DOWN, KC_RGHT, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______
+ )
+
+};
diff --git a/keyboards/ai03/altair/keymaps/via/rules.mk b/keyboards/ai03/altair/keymaps/via/rules.mk
new file mode 100644
index 0000000000..1e5b99807c
--- /dev/null
+++ b/keyboards/ai03/altair/keymaps/via/rules.mk
@@ -0,0 +1 @@
+VIA_ENABLE = yes
diff --git a/keyboards/ai03/altair/readme.md b/keyboards/ai03/altair/readme.md
new file mode 100644
index 0000000000..959759d945
--- /dev/null
+++ b/keyboards/ai03/altair/readme.md
@@ -0,0 +1,19 @@
+# Altair
+
+
+
+ai03's third-generation ergonomic keyboard, 5-row variant
+
+* Keyboard Maintainer: [ai03](https://github.com/ai03-2725)
+* Hardware Supported: Altair keyboard PCB
+* Hardware Availability: Group buy
+
+Make example for this keyboard (after setting up your build environment):
+
+ make ai03/altair:default
+
+Flashing example for this keyboard:
+
+ make ai03/altair:default:flash
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).
diff --git a/keyboards/ai03/altair/rules.mk b/keyboards/ai03/altair/rules.mk
new file mode 100644
index 0000000000..161ec22b16
--- /dev/null
+++ b/keyboards/ai03/altair/rules.mk
@@ -0,0 +1 @@
+SERIAL_DRIVER = vendor