diff --git a/.changeset/model-switcher-full-name-tooltip.md b/.changeset/model-switcher-full-name-tooltip.md
new file mode 100644
index 00000000..04d78353
--- /dev/null
+++ b/.changeset/model-switcher-full-name-tooltip.md
@@ -0,0 +1,5 @@
+---
+"@open-codesign/desktop": patch
+---
+
+Show the full model id as a hover tooltip on each option in the model switcher dropdown, so long BYOK model names (which include the provider prefix) are fully readable.
diff --git a/apps/desktop/src/renderer/src/components/ModelSwitcher.tsx b/apps/desktop/src/renderer/src/components/ModelSwitcher.tsx
index 8f72f400..d899f8b1 100644
--- a/apps/desktop/src/renderer/src/components/ModelSwitcher.tsx
+++ b/apps/desktop/src/renderer/src/components/ModelSwitcher.tsx
@@ -304,6 +304,7 @@ export function ModelSwitcher({ variant }: ModelSwitcherProps) {
                     type="button"
                     role="option"
                     aria-selected={isActive}
+                    title={m}
                     onClick={() => void switchModel(m)}
                     className={`relative w-full text-left px-[var(--space-3)] py-[var(--space-1_5)] text-[12px] [overflow-wrap:anywhere] transition-colors ${
                       isActive