diff --git a/internal/panel/format.go b/internal/panel/format.go
index e1c0e893..d5e1153c 100644
--- a/internal/panel/format.go
+++ b/internal/panel/format.go
@@ -75,6 +75,7 @@ func formatCompactDecimal(v float64) string {
 //	claude-opus-4-8            → "Opus 4.8"
 //	claude-sonnet-4-6          → "Sonnet 4.6"
 //	claude-haiku-4-5-20251001  → "Haiku 4.5"   (trailing date stamp dropped)
+//	claude-fable-5-1           → "Fable 5.1"
 //	claude-3-5-sonnet          → "Sonnet 3.5"  (older ordering)
 //	gpt-5.5                    → "GPT-5.5"
 //	gpt-5.3-codex              → "GPT-5.3 Codex"
@@ -98,7 +99,7 @@ func displayModel(raw string) string {
 		ver := make([]string, 0, len(parts))
 		for _, p := range parts {
 			switch strings.ToLower(p) {
-			case "opus", "sonnet", "haiku":
+			case "opus", "sonnet", "haiku", "fable", "mythos":
 				tier = titleWord(p)
 			default:
 				ver = append(ver, p)
diff --git a/internal/panel/format_test.go b/internal/panel/format_test.go
index 8a978c96..a0da58e8 100644
--- a/internal/panel/format_test.go
+++ b/internal/panel/format_test.go
@@ -30,6 +30,9 @@ func TestDisplayModel(t *testing.T) {
 		{"claude-sonnet-4-6", "Sonnet 4.6"},
 		{"claude-haiku-4-5-20251001", "Haiku 4.5"}, // trailing date stamp dropped
 		{"claude-3-5-sonnet", "Sonnet 3.5"},        // older number-first ordering
+		{"claude-fable-5", "Fable 5"},
+		{"claude-fable-5-1", "Fable 5.1"},
+		{"claude-mythos-5-1", "Mythos 5.1"},
 		{"claude-3-5-sonnet-20241022", "Sonnet 3.5"},
 		{"gpt-5.5", "GPT-5.5"},
 		{"gpt-5.4", "GPT-5.4"},
@@ -39,6 +42,8 @@ func TestDisplayModel(t *testing.T) {
 		{"gpt-daybreak-blue-latest", "GPT-Daybreak Blue"},
 		{"gemini-2.5-pro", "Gemini 2.5 Pro"},
 		{"gemini-2.0-flash", "Gemini 2.0 Flash"},
+		{"gpt-6-astra", "GPT-6 Astra"},
+		{"grok-4.6", "Grok 4.6"},            // unknown vendor → title-cased fallback
 		{"  claude-opus-4-8  ", "Opus 4.8"}, // trimmed
 		{"", "(none)"},
 		{"(none)", "(none)"},
diff --git a/internal/pricing/pricing.go b/internal/pricing/pricing.go
index c8309798..b520eca3 100644
--- a/internal/pricing/pricing.go
+++ b/internal/pricing/pricing.go
@@ -46,6 +46,14 @@ var gpt56SolPeriods = []ratePeriod{
 	{From: gpt56SolPromoFrom, Rates: Rates{Input: 4.0e-6, Output: 2.0e-5, CacheRead: 4.0e-7, CacheCreation: 5.0e-6}},
 }
 
+// fable51Periods is shared by claude-fable-5-1 and claude-mythos-5-1, which
+// ship at the same tariff. Anthropic left the $0.25/MTok cache read
+// unconfirmed for Mythos 5.1 at launch; the shared slice mirrors Fable 5.1
+// and keeps the two from drifting.
+var fable51Periods = []ratePeriod{
+	{Rates: Rates{Input: 1.0e-5, Output: 5.0e-5, CacheRead: 2.5e-7, CacheCreation: 1.25e-5}},
+}
+
 func fixed(r Rates) []ratePeriod {
 	return []ratePeriod{{Rates: r}}
 }
@@ -74,6 +82,11 @@ var ratesByModel = map[string][]ratePeriod{
 	// fast-mode sessions are estimated at the standard rate.
 	"claude-opus-5":   fixed(Rates{Input: 5.0e-6, Output: 2.5e-5, CacheRead: 5.0e-7, CacheCreation: 6.25e-6}),
 	"claude-mythos-5": fixed(Rates{Input: 1.0e-5, Output: 5.0e-5, CacheRead: 1.0e-6, CacheCreation: 1.25e-5}),
+	// The 5.1 generation kept the $10/$50 tariff but cut the cache read to
+	// $0.25/MTok. Both ids need their own key so the prefix fallback cannot
+	// price them at the 5.0 generation's $1/MTok read.
+	"claude-fable-5-1":  fable51Periods,
+	"claude-mythos-5-1": fable51Periods,
 
 	// OpenAI — GPT-5 generation.
 	"gpt-5":               fixed(Rates{Input: 1.25e-6, Output: 1.0e-5, CacheRead: 1.25e-7}),
@@ -113,6 +126,13 @@ var ratesByModel = map[string][]ratePeriod{
 	// future suffix through the prefix fallback.
 	"gpt-daybreak-blue": gpt56SolPeriods,
 
+	// OpenAI — GPT-6 generation.
+	// Prompts over 272K input reprice the whole request at 2x input and 1.5x
+	// output, and Fast mode doubles the tariff under the same model id.
+	// Neither is modelled: session totals carry no per-request prompt length,
+	// the same documented approximation as the Gemini and Grok context tiers.
+	"gpt-6-astra": fixed(Rates{Input: 1.0e-5, Output: 5.0e-5, CacheRead: 1.0e-6, CacheCreation: 1.25e-5}),
+
 	// OpenAI — o-series reasoning models.
 	"o3": fixed(Rates{Input: 2.0e-6, Output: 8.0e-6, CacheRead: 5.0e-7}),
 
@@ -159,6 +179,8 @@ var modelAliases = map[string]string{
 	"claude-sonnet-4.5": "claude-sonnet-4-5",
 	"claude-sonnet-4.6": "claude-sonnet-4-6",
 	"claude-haiku-4.5":  "claude-haiku-4-5",
+	"claude-fable-5.1":  "claude-fable-5-1",
+	"claude-mythos-5.1": "claude-mythos-5-1",
 	"gpt-codex-5.3":     "gpt-5.3-codex",
 	"gpt-5.6":           "gpt-5.6-sol",
 }
diff --git a/internal/pricing/pricing_test.go b/internal/pricing/pricing_test.go
index 87eebcc8..65b44e15 100644
--- a/internal/pricing/pricing_test.go
+++ b/internal/pricing/pricing_test.go
@@ -149,6 +149,12 @@ func TestLookupKnownModelsFromRealStore(t *testing.T) {
 		{"claude-fable-5-20260601", Rates{Input: 1.0e-5, Output: 5.0e-5, CacheRead: 1.0e-6, CacheCreation: 1.25e-5}},
 		{"claude-opus-5", Rates{Input: 5.0e-6, Output: 2.5e-5, CacheRead: 5.0e-7, CacheCreation: 6.25e-6}},
 		{"claude-mythos-5", Rates{Input: 1.0e-5, Output: 5.0e-5, CacheRead: 1.0e-6, CacheCreation: 1.25e-5}},
+		// The 5.1 generation reads cache at $0.25/MTok, not $1.
+		{"claude-fable-5-1", Rates{Input: 1.0e-5, Output: 5.0e-5, CacheRead: 2.5e-7, CacheCreation: 1.25e-5}},
+		{"claude-fable-5-1-20260901", Rates{Input: 1.0e-5, Output: 5.0e-5, CacheRead: 2.5e-7, CacheCreation: 1.25e-5}},
+		{"claude-fable-5.1", Rates{Input: 1.0e-5, Output: 5.0e-5, CacheRead: 2.5e-7, CacheCreation: 1.25e-5}},
+		{"claude-mythos-5-1", Rates{Input: 1.0e-5, Output: 5.0e-5, CacheRead: 2.5e-7, CacheCreation: 1.25e-5}},
+		{"claude-mythos-5.1", Rates{Input: 1.0e-5, Output: 5.0e-5, CacheRead: 2.5e-7, CacheCreation: 1.25e-5}},
 		{"composer-1", Rates{Input: 1.25e-6, Output: 1.0e-5, CacheRead: 1.25e-7}},
 		{"composer-1.5", Rates{Input: 3.5e-6, Output: 1.75e-5, CacheRead: 3.5e-7}},
 		{"composer-2", Rates{Input: 5.0e-7, Output: 2.5e-6, CacheRead: 2.0e-7}},
@@ -175,6 +181,8 @@ func TestLookupKnownModelsFromRealStore(t *testing.T) {
 		{"gpt-5.6-terra", Rates{Input: 2.5e-6, Output: 1.5e-5, CacheRead: 2.5e-7, CacheCreation: 3.125e-6}},
 		{"gpt-5.6-terra-high", Rates{Input: 2.5e-6, Output: 1.5e-5, CacheRead: 2.5e-7, CacheCreation: 3.125e-6}},
 		{"gpt-5.6-luna", Rates{Input: 1.0e-6, Output: 6.0e-6, CacheRead: 1.0e-7, CacheCreation: 1.25e-6}},
+		{"gpt-6-astra", Rates{Input: 1.0e-5, Output: 5.0e-5, CacheRead: 1.0e-6, CacheCreation: 1.25e-5}},
+		{"gpt-6-astra-high", Rates{Input: 1.0e-5, Output: 5.0e-5, CacheRead: 1.0e-6, CacheCreation: 1.25e-5}},
 		// Daybreak program alias for Sol; Codex records the -latest form,
 		// which resolves via the prefix fallback.
 		{"gpt-daybreak-blue", Rates{Input: 5.0e-6, Output: 3.0e-5, CacheRead: 5.0e-7, CacheCreation: 6.25e-6}},
@@ -229,6 +237,19 @@ func TestLookupOpus47DoesNotInheritOpus4Rate(t *testing.T) {
 // TestLookupComposer2FastDoesNotInheritComposer2Rate is the composer-side
 // twin of the opus-4-7 guard: Cursor's fast variant costs 3× the standard
 // tier, so a prefix collapse would under-report it.
+// TestLookupFable51DoesNotInheritFable5CacheRate pins the reason
+// claude-fable-5-1 needs its own key: without it the prefix fallback lands on
+// claude-fable-5 and overstates every cache read by 4x.
+func TestLookupFable51DoesNotInheritFable5CacheRate(t *testing.T) {
+	got, ok := Lookup("claude-fable-5-1", pricingTestTime)
+	require.True(t, ok)
+	require.Equal(t, 2.5e-7, got.CacheRead)
+
+	base, ok := Lookup("claude-fable-5", pricingTestTime)
+	require.True(t, ok)
+	require.Equal(t, 1.0e-6, base.CacheRead)
+}
+
 func TestLookupComposer2FastDoesNotInheritComposer2Rate(t *testing.T) {
 	got, ok := Lookup("composer-2-fast", pricingTestTime)
 	require.True(t, ok)