feat(claude): default xhigh support for newer Opus models (#2874)

Integrated into release/v3.8.6.

src/lib/db/settings.ts

@@ -103,7 +103,10 @@ export async function getSettings() {
     autoRefreshProviderQuotaInterval: 180,
     comboConfigMode: "guided",
     codexServiceTier: { enabled: false },
-    claudeFastMode: { enabled: false, supportedModels: ["claude-opus-4-7", "claude-opus-4-6"] },
+    claudeFastMode: {
+      enabled: false,
+      supportedModels: ["claude-opus-4-8", "claude-opus-4-7", "claude-opus-4-6"],
+    },
     codexSessionAffinityTtlMs: 0,
     alwaysPreserveClientCache: "auto",
     idempotencyWindowMs: 5000,

src/lib/providers/claudeFastMode.ts

@@ -6,7 +6,11 @@ type JsonRecord = Record<string, unknown>;
  * Mirrors the binary-side gate observed in claude-code v2.1.145 (KT() check):
  * only the latest Opus tiers can request the priority service path.
  */
-export const CLAUDE_FAST_MODE_DEFAULT_MODELS = ["claude-opus-4-7", "claude-opus-4-6"] as const;
+export const CLAUDE_FAST_MODE_DEFAULT_MODELS = [
+  "claude-opus-4-8",
+  "claude-opus-4-7",
+  "claude-opus-4-6",
+] as const;
 
 function asRecord(value: unknown): JsonRecord {
   return value && typeof value === "object" && !Array.isArray(value) ? (value as JsonRecord) : {};
@@ -39,7 +43,7 @@ export function isClaudeFastModeEnabled(settings: unknown): boolean {
 
 /**
  * Returns the configured supported-model list, defaulting to the conservative
- * Opus 4-7 / 4-6 pair (matches the binary KT() gate).
+ * Opus 4-8 / 4-7 / 4-6 set.
  */
 export function getClaudeFastModeSupportedModels(settings: unknown): string[] {
   const record = asRecord(settings);
@@ -51,7 +55,7 @@ export function getClaudeFastModeSupportedModels(settings: unknown): string[] {
 
 /**
  * True when the toggle is on AND the model id prefix-matches a supported model.
- * Prefix matching tolerates dated suffixes (e.g. claude-opus-4-7-20260201).
+ * Prefix matching tolerates dated suffixes (e.g. claude-opus-4-8-20260528).
  */
 export function shouldRequestClaudeFastMode(
   settings: unknown,

src/lib/providers/staticModels.ts

@@ -37,6 +37,7 @@ const STATIC_MODEL_PROVIDERS: Record<string, () => Array<{ id: string; name: str
   ],
   antigravity: () => ANTIGRAVITY_PUBLIC_MODELS.map((model) => ({ ...model })),
   claude: () => [
+    { id: "claude-opus-4-8", name: "Claude Opus 4.8" },
     { id: "claude-opus-4-7", name: "Claude Opus 4.7" },
     { id: "claude-opus-4-6", name: "Claude Opus 4.6" },
     { id: "claude-sonnet-4-6", name: "Claude Sonnet 4.6" },

src/shared/constants/modelSpecs.ts

@@ -187,6 +187,20 @@ export const MODEL_SPECS: Record<string, ModelSpec> = {
     aliases: BEDROCK_CLAUDE_ALIASES("claude-opus-4-7", "claude-opus-4.7"),
   },
 
+  // ── Claude Opus 4.8 ─────────────────────────────────────────────
+  "claude-opus-4-8": {
+    maxOutputTokens: 128000,
+    contextWindow: 1000000,
+    // Opus 4.8 inherits Opus 4.7's adaptive thinking constraints: no fixed
+    // thinking budget requests, with effort controlled by output_config.
+    defaultThinkingBudget: 32000,
+    thinkingBudgetCap: 120000,
+    supportsThinking: true,
+    supportsTools: true,
+    supportsVision: true,
+    aliases: BEDROCK_CLAUDE_ALIASES("claude-opus-4-8", "claude-opus-4.8"),
+  },
+
   // ── Claude Sonnet 4.5 ───────────────────────────────────────────
   "claude-sonnet-4-5-20250929": {
     maxOutputTokens: 64000,

src/shared/constants/pricing.ts

@@ -129,6 +129,13 @@ export const DEFAULT_PRICING = {
 
   // Claude Code (cc)
   cc: {
+    "claude-opus-4-8": {
+      input: 5.0,
+      output: 25.0,
+      cached: 2.5,
+      reasoning: 25.0,
+      cache_creation: 5.0,
+    },
     "claude-opus-4-7": {
       input: 5.0,
       output: 25.0,
@@ -710,6 +717,9 @@ export const DEFAULT_PRICING = {
     // Common model IDs (without dates) used across providers
     // Intentional duplicates of dot-notation variants (e.g. claude-opus-4.6)
     // to cover hyphen-notation IDs (claude-opus-4-6) used by some clients
+    "claude-opus-4.8": CLAUDE_OPUS_4_PRICING,
+    "claude-opus-4-8": CLAUDE_OPUS_4_PRICING,
+    "claude-opus-4-7": CLAUDE_OPUS_4_PRICING,
     "claude-opus-4-6": CLAUDE_OPUS_46_PRICING,
     "claude-sonnet-4-6": CLAUDE_SONNET_46_PRICING,
     "claude-opus-4-5-20251101": CLAUDE_OPUS_4_PRICING,