# v0.5.20 (2026-07-07)

## Features
- **Thinking**: per-model thinking level picker on provider page — appends `(level)` suffix to copied model names for forced reasoning effort across all formats (openai, claude, gemini, deepseek, kimi, qwen, zai, minimax, hunyuan, step)
- **RTK**: add JS-native git-log filter (#2423)
- **Caveman**: add targeted upstream-aligned style rules (#2424)
- **i18n**: add Farsi (fa) language support (#2385)

## Fixes
- **Thinking**: strip `(level)` suffix from upstream `body.model` so providers no longer reject requests
- **Translator**: preserve developer instructions in openai-responses conversion (#2434)
- **count_tokens**: count structured Anthropic blocks (#2419)
- **Volcengine-ark**: clamp GLM-5 max_tokens to model output ceiling (#2428)
- **Kimi**: normalize reasoning_effort to backend enum (#2427)
- **Claude**: reconcile max_tokens vs thinking budget and lift per-model ceiling (#2381)
- **Kiro**: deliver system prompt natively, add Opus 4.5/4.7/4.8, tolerate dash version ids (#2366)
- **Headroom**: proxy dashboard through app (#2372)
- **MITM**: recover from stale lock file on server start

CHANGELOG.md

@@ -1,3 +1,22 @@
+# v0.5.20 (2026-07-07)
+
+## Features
+- **Thinking**: per-model thinking level picker on provider page — appends `(level)` suffix to copied model names for forced reasoning effort across all formats (openai, claude, gemini, deepseek, kimi, qwen, zai, minimax, hunyuan, step)
+- **RTK**: add JS-native git-log filter (#2423)
+- **Caveman**: add targeted upstream-aligned style rules (#2424)
+- **i18n**: add Farsi (fa) language support (#2385)
+
+## Fixes
+- **Thinking**: strip `(level)` suffix from upstream `body.model` so providers no longer reject requests
+- **Translator**: preserve developer instructions in openai-responses conversion (#2434)
+- **count_tokens**: count structured Anthropic blocks (#2419)
+- **Volcengine-ark**: clamp GLM-5 max_tokens to model output ceiling (#2428)
+- **Kimi**: normalize reasoning_effort to backend enum (#2427)
+- **Claude**: reconcile max_tokens vs thinking budget and lift per-model ceiling (#2381)
+- **Kiro**: deliver system prompt natively, add Opus 4.5/4.7/4.8, tolerate dash version ids (#2366)
+- **Headroom**: proxy dashboard through app (#2372)
+- **MITM**: recover from stale lock file on server start
+
 # v0.5.18 (2026-07-03)
 
 ## Features

cli/package.json

@@ -1,6 +1,6 @@
 {
   "name": "9router",
-  "version": "0.5.18",
+  "version": "0.5.20",
   "description": "9Router CLI - Start and manage 9Router server",
   "bin": {
     "9router": "./cli.js"

open-sse/config/providerModels.js

@@ -63,14 +63,19 @@ export function getModelType(aliasOrId, modelId) {
 }
 
 export function getModelUpstreamId(aliasOrId, modelId) {
+  // Split off thinking suffix "(level)" so lookup hits the base id; re-append it to
+  // the result so downstream applyThinking still sees the suffix (body.model is stripped separately).
+  const sufMatch = typeof modelId === "string" ? modelId.match(/\([^()]+\)\s*$/) : null;
+  const suffix = sufMatch ? sufMatch[0] : "";
+  const baseId = suffix ? modelId.slice(0, sufMatch.index).trim() : modelId;
   const models = PROVIDER_MODELS[aliasOrId];
-  const found = findModel(models, modelId, aliasOrId);
+  const found = findModel(models, baseId, aliasOrId);
-  if (found?.upstreamModelId) return found.upstreamModelId;
+  if (found?.upstreamModelId) return found.upstreamModelId + suffix;
-  if (found?.id) return found.id;
+  if (found?.id) return found.id + suffix;
-  if (aliasOrId === "cx" && typeof modelId === "string" && modelId.endsWith(CODEX_REVIEW_SUFFIX)) {
+  if (aliasOrId === "cx" && typeof baseId === "string" && baseId.endsWith(CODEX_REVIEW_SUFFIX)) {
-    return modelId.slice(0, -CODEX_REVIEW_SUFFIX.length);
+    return baseId.slice(0, -CODEX_REVIEW_SUFFIX.length) + suffix;
   }
-  return modelId;
+  return baseId + suffix;
 }
 
 export function getModelQuotaFamily(aliasOrId, modelId) {

open-sse/handlers/chatCore.js

@@ -1,5 +1,6 @@
 import { detectFormat, getTargetFormat, resolveTransport } from "../services/provider.js";
 import { translateRequest } from "../translator/index.js";
+import { stripThinkingSuffix } from "../translator/concerns/thinkingUnified.js";
 import { FORMATS } from "../translator/formats.js";
 import { normalizeClaudePassthrough } from "../translator/formats/claude.js";
 import { COLORS } from "../utils/stream.js";
@@ -123,9 +124,9 @@ export async function handleChatCore({ body, modelInfo, credentials, log, onCred
   let toolNameMap;
   if (passthrough) {
     log?.debug?.("PASSTHROUGH", `${clientTool} → ${provider} | native lossless`);
-    translatedBody = { ...body, model: upstreamModel };
+    translatedBody = { ...body, model: stripThinkingSuffix(upstreamModel) };
     // Normalize newer Cowork/CC beta shapes (adaptive thinking, mid-conversation system) the API rejects
-    if (clientTool === "claude") normalizeClaudePassthrough(translatedBody, upstreamModel);
+    if (clientTool === "claude") normalizeClaudePassthrough(translatedBody, translatedBody.model);
   } else {
     translatedBody = translateRequest(sourceFormat, targetFormat, upstreamModel, body, stream, credentials, provider, reqLogger, stripList, connectionId, clientTool);
     if (!translatedBody) {
@@ -134,7 +135,7 @@ export async function handleChatCore({ body, modelInfo, credentials, log, onCred
     }
     toolNameMap = translatedBody._toolNameMap;
     delete translatedBody._toolNameMap;
-    translatedBody.model = upstreamModel;
+    translatedBody.model = stripThinkingSuffix(upstreamModel);
   }
 
   // Dedupe duplicate built-in tools when equivalent MCP tools are present (Claude clients only).

open-sse/providers/registry/claude.js

@@ -60,12 +60,10 @@ export default {
     },
   },
   models: [
+    { id: "claude-fable-5", name: "Claude Fable 5" },
+    { id: "claude-sonnet-5", name: "Claude Sonnet 5" },
     { 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" },
-    { id: "claude-opus-4-5-20251101", name: "Claude 4.5 Opus" },
-    { id: "claude-sonnet-4-5-20250929", name: "Claude 4.5 Sonnet" },
     { id: "claude-haiku-4-5-20251001", name: "Claude 4.5 Haiku" },
   ],
   oauth: {

open-sse/providers/thinkingLevels.js

@@ -0,0 +1,46 @@
+// Resolve valid thinking levels per model — drives UI level picker (suffix "model(level)").
+// Reuses capabilities.js (thinkingFormat/canDisable) so this file only maps format→levels (DRY).
+import { getCapabilitiesForModel } from "./capabilities.js";
+import { matchPattern } from "./pricing.js";
+
+// Shared level sets (deduped) — verified against provider docs + wire in thinkingUnified.applyFormat.
+const L = {
+  base: ["none", "low", "medium", "high"],                          // qwen, step, hunyuan, gemini-budget
+  onOff: ["none", "thinking"],                                      // zai (binary), minimax (adaptive)
+  openai: ["none", "minimal", "low", "medium", "high", "xhigh"],    // GPT-5.x / o-series (no "max")
+  levelMax: ["none", "low", "medium", "high", "max"],               // claude-adaptive, kimi
+  budgetX: ["none", "low", "medium", "high", "xhigh", "max"],       // claude-budget
+  gemini: ["minimal", "low", "medium", "high"],                     // gemini-3 thinkingLevel (no disable)
+  hiMax: ["none", "high", "max"],                                   // deepseek (low/med→high, xhigh→max)
+};
+
+// thinkingFormat → valid selectable levels (source of truth for UI options).
+const FORMAT_LEVELS = {
+  openai: L.openai,
+  "claude-adaptive": L.levelMax,
+  "claude-budget": L.budgetX,
+  "gemini-level": L.gemini,
+  "gemini-budget": L.base,
+  zai: L.onOff,
+  qwen: L.base,
+  kimi: L.levelMax,
+  deepseek: L.hiMax,
+  minimax: L.onOff,
+  hunyuan: L.base,
+  step: L.base,
+};
+
+// Model-name pattern overrides (glob, first match wins) — more precise than format default.
+const PATTERN_THINKING = [
+  { pattern: "*codex*", levels: ["low", "medium", "high", "xhigh"] }, // codex cannot disable thinking
+];
+
+// Returns valid thinking levels for a model, or null when the model has no reasoning.
+export function getThinkingLevels(provider, model) {
+  const caps = getCapabilitiesForModel(provider, model);
+  if (!caps.reasoning) return null;
+  const hit = PATTERN_THINKING.find((p) => matchPattern(p.pattern, model));
+  let levels = hit?.levels || FORMAT_LEVELS[caps.thinkingFormat] || L.base;
+  if (caps.thinkingCanDisable === false) levels = levels.filter((l) => l !== "none");
+  return levels;
+}

open-sse/translator/concerns/thinkingUnified.js

@@ -20,6 +20,13 @@ const FORMAT_TO_NATIVE = {
   kiro: "kiro",
 };
 
+// Strip a trailing thinking suffix "model(value)" → "model" (no-op when absent).
+export function stripThinkingSuffix(model) {
+  if (typeof model !== "string") return model;
+  const m = model.match(/^(.*)\([^()]+\)\s*$/);
+  return m ? m[1].trim() : model;
+}
+
 // Parse model-name suffix "model(value)" → { cleanModel, override }.
 // value: level name (high) | number (8192) | auto | none. null override when absent.
 export function parseSuffix(model) {

package.json

@@ -1,6 +1,6 @@
 {
   "name": "9router-app",
-  "version": "0.5.18",
+  "version": "0.5.20",
   "description": "9Router web dashboard",
   "private": true,
   "scripts": {

src/app/(dashboard)/dashboard/providers/[id]/ModelRow.js

@@ -1,7 +1,8 @@
 import PropTypes from "prop-types";
 import { CapacityBadges } from "@/shared/components";
 
-export default function ModelRow({ model, fullModel, alias, copied, onCopy, testStatus, isCustom, isFree, onDeleteAlias, onTest, isTesting, onDisable, caps }) {
+export default function ModelRow({ model, fullModel, alias, copied, onCopy, testStatus, isCustom, isFree, onDeleteAlias, onTest, isTesting, onDisable, caps, thinkingSuffix }) {
+  const displayModel = thinkingSuffix ? `${fullModel}(${thinkingSuffix})` : fullModel;
   const borderColor = testStatus === "ok"
     ? "border-green-500/40"
     : testStatus === "error"
@@ -24,7 +25,7 @@ export default function ModelRow({ model, fullModel, alias, copied, onCopy, test
           {testStatus === "ok" ? "check_circle" : testStatus === "error" ? "cancel" : "smart_toy"}
         </span>
         <div className="flex min-w-0 flex-1 flex-col gap-1">
-          <code className="max-w-[72vw] truncate rounded bg-sidebar px-1.5 py-0.5 font-mono text-xs text-text-muted sm:max-w-[360px]">{fullModel}</code>
+          <code className="max-w-[72vw] truncate rounded bg-sidebar px-1.5 py-0.5 font-mono text-xs text-text-muted sm:max-w-[360px]">{displayModel}</code>
           <span className="flex min-w-0 items-center text-[9px] gap-1 pl-1">
             {model.name && <span className="truncate text-[9px] italic text-text-muted/70">{model.name}</span>}
             <CapacityBadges caps={caps} colorOverride="text-text-muted/70" size={12} />
@@ -48,7 +49,7 @@ export default function ModelRow({ model, fullModel, alias, copied, onCopy, test
         )}
         <div className="relative shrink-0 group/btn">
           <button
-            onClick={() => onCopy(fullModel, `model-${model.id}`)}
+            onClick={() => onCopy(displayModel, `model-${model.id}`)}
             className="rounded p-0.5 text-text-muted hover:bg-sidebar hover:text-primary"
           >
             <span className="material-symbols-outlined text-sm">
@@ -97,4 +98,5 @@ ModelRow.propTypes = {
   isTesting: PropTypes.bool,
   onDisable: PropTypes.func,
   caps: PropTypes.object,
+  thinkingSuffix: PropTypes.string,
 };

src/app/(dashboard)/dashboard/providers/[id]/page.js

@@ -5,8 +5,9 @@ import { useParams, useRouter } from "next/navigation";
 import Link from "next/link";
 import Image from "next/image";
 import { Card, Button, Badge, Input, Modal, CardSkeleton, OAuthModal, KiroOAuthWrapper, CursorAuthModal, IFlowCookieModal, GitLabAuthModal, Toggle, Select, EditConnectionModal, NoAuthProxyCard, ConfirmModal } from "@/shared/components";
-import { OAUTH_PROVIDERS, APIKEY_PROVIDERS, FREE_PROVIDERS, FREE_TIER_PROVIDERS, WEB_COOKIE_PROVIDERS, getProviderAlias, isOpenAICompatibleProvider, isAnthropicCompatibleProvider, AI_PROVIDERS, THINKING_CONFIG } from "@/shared/constants/providers";
+import { OAUTH_PROVIDERS, APIKEY_PROVIDERS, FREE_PROVIDERS, FREE_TIER_PROVIDERS, WEB_COOKIE_PROVIDERS, getProviderAlias, isOpenAICompatibleProvider, isAnthropicCompatibleProvider, AI_PROVIDERS } from "@/shared/constants/providers";
 import { getModelsByProviderId, getModelKind } from "@/shared/constants/models";
+import { getThinkingLevels } from "open-sse/providers/thinkingLevels.js";
 import { useCopyToClipboard } from "@/shared/hooks/useCopyToClipboard";
 import { useModelCaps } from "@/shared/hooks/useModelCaps";
 import { translate } from "@/i18n/runtime";
@@ -149,7 +150,21 @@ export default function ProviderDetailPage() {
   const hasDualAuthModes = !isCompatible && isOAuth && supportsApiKeyAuth;
   const oauthConnectionLabel = providerId === "xai" ? "Grok Build OAuth" : "OAuth";
   const apiKeyConnectionLabel = providerId === "xai" ? "xAI API Key" : "API Key";
-  const thinkingConfig = AI_PROVIDERS[providerId]?.thinkingConfig || THINKING_CONFIG.extended;
+  // Resolve suffix "(level)" for a model when a thinking level is picked and the model supports it.
+  const resolveThinkingSuffix = (modelId) => {
+    if (!thinkingMode || thinkingMode === "auto") return null;
+    const levels = getThinkingLevels(providerId, modelId);
+    return levels && levels.includes(thinkingMode) ? thinkingMode : null;
+  };
+  // Union of levels across this provider's reasoning models — drives the level picker options.
+  const providerThinkingLevels = (() => {
+    const set = new Set();
+    for (const m of models) {
+      const lv = getThinkingLevels(providerId, m.id);
+      if (lv) lv.forEach((l) => { if (l !== "none") set.add(l); });
+    }
+    return set.size ? ["auto", ...[...set]] : null;
+  })();
   
   const providerStorageAlias = isCompatible ? providerId : providerAlias;
   const providerDisplayAlias = isCompatible
@@ -1065,6 +1080,7 @@ export default function ProviderDetailPage() {
             isCustom
             isFree={false}
             caps={getCaps(`${providerId}/${model.id}`)}
+            thinkingSuffix={resolveThinkingSuffix(model.id)}
           />
         ))}
 
@@ -1090,6 +1106,7 @@ export default function ProviderDetailPage() {
               isFree={model.isFree}
               onDisable={() => handleDisableModel(model.id)}
               caps={getCaps(`${providerId}/${model.id}`)}
+              thinkingSuffix={resolveThinkingSuffix(model.id)}
             />
           );
         })}
@@ -1395,21 +1412,6 @@ export default function ProviderDetailPage() {
                   )}
                 </>
               )}
-              {/* Thinking config */}
-              {/* {thinkingConfig && (
-                <div className="flex items-center gap-2">
-                  <span className="text-xs text-text-muted font-medium">Thinking</span>
-                  <select
-                    value={thinkingMode}
-                    onChange={(e) => handleThinkingModeChange(e.target.value)}
-                    className="text-xs px-2 py-1 border border-border rounded-md bg-background focus:outline-none focus:border-primary"
-                  >
-                    {thinkingConfig.options.map((opt) => (
-                      <option key={opt} value={opt}>{opt.charAt(0).toUpperCase() + opt.slice(1)}</option>
-                    ))}
-                  </select>
-                </div>
-              )} */}
               {/* Round Robin toggle */}
               <div className="flex flex-wrap items-center gap-2">
                 <span className="text-xs text-text-muted font-medium">Round Robin</span>
@@ -1580,9 +1582,23 @@ export default function ProviderDetailPage() {
       {/* Models */}
       <Card>
         <div className="mb-4 flex flex-col gap-2 sm:flex-row sm:items-center sm:justify-between">
-          <h2 className="text-lg font-semibold">
+          <div className="flex items-center gap-3">
-            {"Available Models"}
+            <h2 className="text-lg font-semibold">
-          </h2>
+              {"Available Models"}
+            </h2>
+            {providerThinkingLevels && (
+              <select
+                value={thinkingMode}
+                onChange={(e) => handleThinkingModeChange(e.target.value)}
+                title="Appends (level) suffix to copied model names"
+                className="rounded-md border border-border bg-background px-2 py-1 text-xs focus:border-primary focus:outline-none"
+              >
+                {providerThinkingLevels.map((opt) => (
+                  <option key={opt} value={opt}>{`Thinking: ${opt.charAt(0).toUpperCase() + opt.slice(1)}`}</option>
+                ))}
+              </select>
+            )}
+          </div>
           {!isCompatible && (() => {
             const allIds = [
               ...models,

src/shared/constants/cliTools.js

@@ -95,13 +95,15 @@ export const CLI_TOOLS = {
       model: "ANTHROPIC_MODEL",
       opusModel: "ANTHROPIC_DEFAULT_OPUS_MODEL",
       sonnetModel: "ANTHROPIC_DEFAULT_SONNET_MODEL",
+      fableModel: "ANTHROPIC_DEFAULT_FABLE_MODEL",
       haikuModel: "ANTHROPIC_DEFAULT_HAIKU_MODEL",
     },
-    modelAliases: ["default", "sonnet", "opus", "haiku", "opusplan"],
+    modelAliases: ["default", "sonnet", "opus", "fable", "haiku", "opusplan"],
     settingsFile: "~/.claude/settings.json",
     defaultModels: [
-      { id: "opus", name: "Claude Opus", alias: "opus", envKey: "ANTHROPIC_DEFAULT_OPUS_MODEL", defaultValue: "cc/claude-opus-4-6" },
+      { id: "opus", name: "Claude Opus", alias: "opus", envKey: "ANTHROPIC_DEFAULT_OPUS_MODEL", defaultValue: "cc/claude-opus-4-8" },
-      { id: "sonnet", name: "Claude Sonnet", alias: "sonnet", envKey: "ANTHROPIC_DEFAULT_SONNET_MODEL", defaultValue: "cc/claude-sonnet-4-6" },
+      { id: "sonnet", name: "Claude Sonnet", alias: "sonnet", envKey: "ANTHROPIC_DEFAULT_SONNET_MODEL", defaultValue: "cc/claude-sonnet-5" },
+      { id: "fable", name: "Claude Fable", alias: "fable", envKey: "ANTHROPIC_DEFAULT_FABLE_MODEL", defaultValue: "cc/claude-fable-5" },
       { id: "haiku", name: "Claude Haiku", alias: "haiku", envKey: "ANTHROPIC_DEFAULT_HAIKU_MODEL", defaultValue: "cc/claude-haiku-4-5-20251001" },
     ],
   },