diff --git a/internal/gateway/desktop.go b/internal/gateway/desktop.go
index 23586f93..dc30879c 100644
--- a/internal/gateway/desktop.go
+++ b/internal/gateway/desktop.go
@@ -150,10 +150,12 @@ func DesktopID(e provider.Entry) string { return claudeLooking(e) }
 // picked for it (provider.CatalogFor, the Agents page's model list) by an id
 // it keeps (claudeLooking), named by its own name alone (蓝猫: "DeepSeek
 // V4.1 Flash", not with its provider's beside it). Desktop shows the name,
-// not the id, and its description after it, so none is given; it folds rows
+// not the id, and its description after it, so none is given but a 1M
+// entry's (desktop1M); it folds rows
 // of one name into one entry, so two models of one name keep their
 // provider's after it (desktopNames). A model of 1M or more is listed by
-// its "[1m]" id under settings.DesktopLongest (desktop1M).
+// its "[1m]" id under settings.DesktopLongest, described as Desktop's own
+// 1M entry is (desktop1M).
 func desktopModels(entries []provider.Entry) []map[string]any {
 	names := desktopNames(entries)
 	// the tier each model stands in for: the user's pick (a model picked
@@ -174,6 +176,7 @@ func desktopModels(entries []provider.Entry) []map[string]any {
 		m["id"] = claudeLooking(e)
 		if longest && e.Context >= desktop1M {
 			m["id"] = m["id"].(string) + "[1m]"
+			m["description"] = desktop1MSaid
 		}
 		if t := tierOf[e.ID]; t != "" {
 			m["anthropic_family_tier"], m["is_family_default"] = t, true
@@ -192,8 +195,22 @@ func desktopModels(entries []provider.Entry) []map[string]any {
 // model is listed by that 1M id alone (#1272), which magpie serves as the
 // plain one (aliased, provider.Resolve take "[1m]" off), so a session
 // saved on the plain id still runs.
+//
+// Desktop says which entry is the 1M one only on the entry it adds: its
+// description is "1M context window" (WLt in JLt, 2.7032). A row of
+// magpie's whose id has "[1m]" gets nothing of that (PIt gives supports1m
+// to a bare id alone, and OIt folds a "[1m]" row only into a bare one
+// beside it), so it was shown as the plain model, by name alone, and the
+// switch read as doing the reverse of what it says (杰多夫 on Discord).
+// The row is described as Desktop describes its own 1M entry
+// (desktop1MSaid); its id, which Desktop hands Claude Code, has the "[1m]"
+// that gives a session the 1M window.
 const desktop1M = 1_000_000
 
+// desktop1MSaid is the description Claude Desktop gives the 1M entry it
+// adds (WLt in its app.asar, 2.7032).
+const desktop1MSaid = "1M context window"
+
 // Claude Desktop's Code tab runs Claude Code with ANTHROPIC_DEFAULT_<TIER>_MODEL
 // set to "" for every tier, unless the gateway's /v1/models tags a model
 // with anthropic_family_tier (shortnameIdentityOverrides in its app.asar,
diff --git a/internal/gateway/desktop_longest_test.go b/internal/gateway/desktop_longest_test.go
index 86c5e8b7..0eb093a2 100644
--- a/internal/gateway/desktop_longest_test.go
+++ b/internal/gateway/desktop_longest_test.go
@@ -13,7 +13,9 @@ import (
 // Claude Desktop shows a gateway model of 1M tokens or more twice, its
 // plain entry and a "1M context window" one it adds itself (#1272: 21
 // models made 34 entries). With DesktopLongest on, such a model is listed
-// by its "[1m]" id alone, so Desktop's menu has one entry per model; one
+// by its "[1m]" id alone, so Desktop's menu has one entry per model, told
+// as the 1M one by the "1M context window" Desktop gives its own (a lone
+// "[1m]" row was shown as the plain model: 杰多夫 on Discord); one
 // under 1M (872K) keeps its own id and window, and a request on the plain id
 // a session was saved with is still served.
 func TestClaudeDesktopLongestOnly(t *testing.T) {
@@ -37,6 +39,7 @@ func TestClaudeDesktopLongestOnly(t *testing.T) {
 	type row struct {
 		ID       string `json:"id"`
 		MaxInput int    `json:"max_input_tokens"`
+		Said     string `json:"description"`
 	}
 	list := func() map[string]row {
 		t.Helper()
@@ -96,6 +99,16 @@ func TestClaudeDesktopLongestOnly(t *testing.T) {
 			t.Errorf("on: %s listed as %q, want %q", id, r.ID, want)
 		}
 	}
+	for id, r := range on {
+		if want := map[bool]string{true: "1M context window"}[strings.HasSuffix(r.ID, "[1m]")]; r.Said != want {
+			t.Errorf("on: %s (%s) described %q, want %q", id, r.ID, r.Said, want)
+		}
+	}
+	for id, r := range off {
+		if r.Said != "" {
+			t.Errorf("off: %s described %q", id, r.Said)
+		}
+	}
 	if r := on["vend/exo-free"]; r.MaxInput != 872_000 {
 		t.Errorf("exo-free's window told as %d, want its own 872000", r.MaxInput)
 	}