diff --git a/shared/src/piThinkingLevel.ts b/shared/src/piThinkingLevel.ts
index 6f70b40c..9f034349 100644
--- a/shared/src/piThinkingLevel.ts
+++ b/shared/src/piThinkingLevel.ts
@@ -1,6 +1,6 @@
 // Pi thinking levels (from Pi's rpc-types.ts ThinkingLevel)
 // Controls how much reasoning/thinking the model performs.
-export const PI_THINKING_LEVELS = ['off', 'minimal', 'low', 'medium', 'high', 'xhigh'] as const
+export const PI_THINKING_LEVELS = ['off', 'minimal', 'low', 'medium', 'high', 'xhigh', 'max'] as const
 export type PiThinkingLevel = typeof PI_THINKING_LEVELS[number]
 
 export const PI_THINKING_LEVEL_LABELS: Record<PiThinkingLevel, string> = {
@@ -10,4 +10,5 @@ export const PI_THINKING_LEVEL_LABELS: Record<PiThinkingLevel, string> = {
     medium: 'Medium',
     high: 'High',
     xhigh: 'XHigh',
+    max: 'Max'
 }
diff --git a/web/src/components/AssistantChat/PiThinkingLevelPanel.tsx b/web/src/components/AssistantChat/PiThinkingLevelPanel.tsx
index 94029001..e778b31a 100644
--- a/web/src/components/AssistantChat/PiThinkingLevelPanel.tsx
+++ b/web/src/components/AssistantChat/PiThinkingLevelPanel.tsx
@@ -3,7 +3,7 @@ import type { PiThinkingLevelMap } from '@/types/api'
 import { FloatingOverlay } from '@/components/ChatInput/FloatingOverlay'
 import { isThinkingLevelSupported } from './piThinkingLevelOptions'
 
-const ALL_LEVELS = ['off', 'minimal', 'low', 'medium', 'high', 'xhigh'] as const
+const ALL_LEVELS = ['off', 'minimal', 'low', 'medium', 'high', 'xhigh', 'max'] as const
 
 /**
  * Determine which thinking levels a model supports.
diff --git a/web/src/components/AssistantChat/piThinkingLevelOptions.ts b/web/src/components/AssistantChat/piThinkingLevelOptions.ts
index 8a9ad358..ceed7261 100644
--- a/web/src/components/AssistantChat/piThinkingLevelOptions.ts
+++ b/web/src/components/AssistantChat/piThinkingLevelOptions.ts
@@ -57,16 +57,17 @@ export function getPiThinkingLevelOptions(
 
 /** Check whether a thinking level is supported by the model's thinkingLevelMap */
 export function isThinkingLevelSupported(level: string, map?: PiThinkingLevelMap): boolean {
-    // xhigh requires explicit opt-in via the map
-    if (level === 'xhigh') {
+    // xhigh and max require explicit opt-in via the map
+    if (level === 'xhigh' || level === 'max') {
         if (!map || !(level in map)) return false
         return map[level] !== null
     }
+
     if (!map || !(level in map)) return true
     return map[level] !== null
 }
 
-/** A level is excluded if it maps to `null` in the thinkingLevelMap, or xhigh without explicit opt-in */
+/** A level is excluded if it maps to `null` in the thinkingLevelMap, or xhigh/max without explicit opt-in */
 function isLevelExcluded(level: string, map?: PiThinkingLevelMap): boolean {
     return !isThinkingLevelSupported(level, map)
 }