diff --git a/extensions/anthropic/claude-model-refs.ts b/extensions/anthropic/claude-model-refs.ts
index 9946867d53e..0b689954983 100644
--- a/extensions/anthropic/claude-model-refs.ts
+++ b/extensions/anthropic/claude-model-refs.ts
@@ -4,7 +4,7 @@ import { CLAUDE_CLI_BACKEND_ID, CLAUDE_CLI_MODEL_ALIASES } from "./cli-constants
 const DEFAULT_CLAUDE_MODEL_BY_FAMILY: Record<string, string> = {
   opus: "claude-opus-4-7",
   sonnet: "claude-sonnet-4-6",
-  haiku: "claude-sonnet-4-6",
+  haiku: "claude-haiku-4-5",
 };
 
 export type ClaudeCliAnthropicModelRefs = {
@@ -117,6 +117,10 @@ function upgradeOldClaudeModelId(normalized: string): string | null {
   if (normalized.startsWith("claude-sonnet-4-6") || normalized.startsWith("claude-sonnet-4.6")) {
     return null;
   }
+  // claude-haiku-4-5 is a current production model and must not be migrated.
+  if (normalized.startsWith("claude-haiku-4-5") || normalized.startsWith("claude-haiku-4.5")) {
+    return null;
+  }
   if (
     normalized === "claude-opus-4" ||
     hasAnyRetiredVersionPrefix(normalized, [
@@ -140,8 +144,6 @@ function upgradeOldClaudeModelId(normalized: string): string | null {
       "claude-sonnet-4.1",
       "claude-sonnet-4-0",
       "claude-sonnet-4.0",
-      "claude-haiku-4-5",
-      "claude-haiku-4.5",
     ]) ||
     /^claude-sonnet-4-20\d{6}/.test(normalized)
   ) {
@@ -172,7 +174,6 @@ function upgradeOldClaudeModelId(normalized: string): string | null {
     normalized === "sonnet-3.7" ||
     normalized === "sonnet-3.5" ||
     normalized === "sonnet-3" ||
-    normalized === "haiku-4.5" ||
     normalized === "haiku-3.5" ||
     normalized === "haiku-3"
   ) {
diff --git a/extensions/anthropic/cli-migration.test.ts b/extensions/anthropic/cli-migration.test.ts
index 857c4fcb734..dad8b369153 100644
--- a/extensions/anthropic/cli-migration.test.ts
+++ b/extensions/anthropic/cli-migration.test.ts
@@ -55,6 +55,28 @@ describe("anthropic Claude model refs", () => {
     expect(resolveKnownAnthropicModelRef("anthropic/claude-sonnet-4-7")).toBe(
       "anthropic/claude-sonnet-4-7",
     );
+    expect(resolveKnownAnthropicModelRef("anthropic/claude-haiku-4-5")).toBe(
+      "anthropic/claude-haiku-4-5",
+    );
+  });
+
+  it("preserves the current claude-haiku-4-5 model and its bare alias", () => {
+    // claude-haiku-4-5 is a current production model (not retired), so neither
+    // its full ref, its dotted variant, nor the bare "haiku" family alias must
+    // be rewritten to sonnet.
+    expect(resolveKnownAnthropicModelRef("anthropic/claude-haiku-4-5")).toBe(
+      "anthropic/claude-haiku-4-5",
+    );
+    expect(resolveKnownAnthropicModelRef("anthropic/claude-haiku-4.5")).toBe(
+      "anthropic/claude-haiku-4.5",
+    );
+    expect(resolveKnownAnthropicModelRef("anthropic/claude-haiku-4-5@anthropic:work")).toBe(
+      "anthropic/claude-haiku-4-5@anthropic:work",
+    );
+    // Genuinely retired Claude 3 Haiku still upgrades to the current sonnet.
+    expect(resolveKnownAnthropicModelRef("anthropic/claude-3-5-haiku-20241022")).toBe(
+      "anthropic/claude-sonnet-4-6",
+    );
   });
 });
 
diff --git a/src/commands/doctor/shared/legacy-config-migrate.test.ts b/src/commands/doctor/shared/legacy-config-migrate.test.ts
index 172ba70c6da..c58903fe91e 100644
--- a/src/commands/doctor/shared/legacy-config-migrate.test.ts
+++ b/src/commands/doctor/shared/legacy-config-migrate.test.ts
@@ -1707,7 +1707,7 @@ describe("legacy model compat migrate", () => {
       },
     });
 
-    expect(res.config?.agents?.defaults?.imageModel).toBe("anthropic/claude-sonnet-4-6");
+    expect(res.config?.agents?.defaults?.imageModel).toBe("anthropic/claude-haiku-4-5");
     expect(res.config?.agents?.defaults?.imageGenerationModel).toEqual({
       primary: "github-copilot/claude-sonnet-4.6",
       fallbacks: ["github-copilot/gpt-5.4-mini"],
@@ -1751,6 +1751,7 @@ describe("legacy model compat migrate", () => {
     });
     expect(res.config?.agents?.defaults?.workspace).toBe("/tmp/claude-3-sonnet");
     expect(res.config?.agents?.defaults?.models).toEqual({
+      "anthropic/claude-haiku-4-5": { alias: "haiku" },
       "anthropic/claude-sonnet-4-6": { alias: "current-sonnet" },
       "github-copilot/claude-opus-4.7": { alias: "copilot-opus" },
       "openai/gpt-5.5-pro": { alias: "old-pro" },
@@ -1770,10 +1771,9 @@ describe("legacy model compat migrate", () => {
           subagent?: { allowedModels?: string[] };
         }
       )?.subagent?.allowedModels,
-    ).toEqual(["anthropic/claude-sonnet-4-6", "*"]);
+    ).toEqual(["anthropic/claude-haiku-4-5", "*"]);
     expect(res.config?.channels?.modelByChannel?.telegram?.["*"]).toBe("anthropic/claude-opus-4-7");
     expectMigrationChangesToIncludeFragments(res.changes, [
-      'config.agents.defaults.imageModel from "anthropic/claude-haiku-4-5" to "anthropic/claude-sonnet-4-6"',
       'config.agents.defaults.imageGenerationModel.primary from "github-copilot/claude-sonnet-4" to "github-copilot/claude-sonnet-4.6"',
       'config.agents.defaults.imageGenerationModel.fallbacks.0 from "github-copilot/grok-code-fast-1" to "github-copilot/gpt-5.4-mini"',
       'config.agents.defaults.musicGenerationModel from "vercel-ai-gateway/anthropic/claude-opus-4-5" to "vercel-ai-gateway/anthropic/claude-opus-4-6"',
@@ -1800,7 +1800,6 @@ describe("legacy model compat migrate", () => {
       'config.agents.defaults.models key from "openai/gpt-5.2-pro" to "openai/gpt-5.5-pro"',
       'config.agents.defaults.models key from "github-copilot/gpt-5-mini" to "github-copilot/gpt-5.4-mini"',
       'config.plugins.entries.lossless-claw.config.summaryModel from "anthropic/claude-3-5-sonnet" to "anthropic/claude-sonnet-4-6"',
-      'config.plugins.entries.lossless-claw.subagent.allowedModels.0 from "anthropic/claude-haiku-4-5" to "anthropic/claude-sonnet-4-6"',
       'config.channels.modelByChannel.telegram.* from "anthropic/claude-opus-4-5" to "anthropic/claude-opus-4-7"',
     ]);
   });
diff --git a/src/commands/doctor/shared/legacy-config-migrations.runtime.models.ts b/src/commands/doctor/shared/legacy-config-migrations.runtime.models.ts
index 91a55962f4a..ed51e54c0b4 100644
--- a/src/commands/doctor/shared/legacy-config-migrations.runtime.models.ts
+++ b/src/commands/doctor/shared/legacy-config-migrations.runtime.models.ts
@@ -635,6 +635,13 @@ function upgradeOldClaudeToken(
   ) {
     return null;
   }
+  // claude-haiku-4-5 is a current production model and must not be migrated.
+  if (
+    normalized.startsWith("claude-haiku-4-5") ||
+    normalized.startsWith("claude-haiku-4.5")
+  ) {
+    return null;
+  }
   if (
     normalized === "claude-opus-4" ||
     hasAnyRetiredVersionPrefix(normalized, [
@@ -658,8 +665,6 @@ function upgradeOldClaudeToken(
       "claude-sonnet-4.1",
       "claude-sonnet-4-0",
       "claude-sonnet-4.0",
-      "claude-haiku-4-5",
-      "claude-haiku-4.5",
     ]) ||
     /^claude-sonnet-4-20\d{6}/.test(normalized)
   ) {
@@ -714,7 +719,6 @@ function upgradeOldClaudeToken(
     normalized === "sonnet-3.7" ||
     normalized === "sonnet-3.5" ||
     normalized === "sonnet-3" ||
-    normalized === "haiku-4.5" ||
     normalized === "haiku-3.5" ||
     normalized === "haiku-3"
   ) {