feat(claude): add Haiku 5.5 with its model capabilities (#6332)

packages/cli/tests/15-provider.test.ts

@@ -122,10 +122,15 @@ const EXPECTED_CLAUDE_MODELS = [
     model: "Opus 4.6",
     descriptionFragment: "Most capable",
   },
+  {
+    id: "claude-haiku-5-5",
+    model: "Haiku 5.5",
+    descriptionFragment: "Fastest",
+  },
   {
     id: "claude-haiku-4-5",
     model: "Haiku 4.5",
-    descriptionFragment: "Fastest",
+    descriptionFragment: "Previous release",
   },
 ] as const;
 
@@ -435,8 +440,8 @@ try {
       "--quiet should print the same ordered model IDs returned by --json",
     );
     assert(
-      claudeModelsFromJson.some((m) => m.id === "claude-sonnet-5-5"),
-      "captured --json output should include the current Claude everyday model id",
+      claudeModelsFromJson.some((m) => m.id === "claude-haiku-5-5"),
+      "captured --json output should include the current Claude quick-answer model id",
     );
     console.log("✓ provider models --quiet outputs model IDs only\n");
   }

packages/server/src/server/agent/providers/claude/agent.test.ts

@@ -496,7 +496,7 @@ describe("ClaudeAgentClient.fetchCatalog", () => {
       const client = new ClaudeAgentClient({
         logger,
         resolveBinary: async () => "/test/claude/bin",
-        resolveVersion: async () => "2.1.284",
+        resolveVersion: async () => "2.1.293",
         runtimeSettings: { env: { CLAUDE_CONFIG_DIR: emptyConfigDir } },
       });
       const { models } = await client.fetchCatalog({
@@ -515,6 +515,15 @@ describe("ClaudeAgentClient.fetchCatalog", () => {
       expect(getThinkingIds("claude-opus-4-8")).toContain("ultracode");
       expect(getThinkingIds("claude-sonnet-5")).toContain("xhigh");
       expect(getThinkingIds("claude-sonnet-5")).toContain("ultracode");
+      expect(getThinkingIds("claude-haiku-5-5")).toEqual([
+        "off",
+        "low",
+        "medium",
+        "high",
+        "xhigh",
+        "max",
+        "ultracode",
+      ]);
       expect(getThinkingIds("claude-sonnet-5-5")).toContain("xhigh");
       expect(getThinkingIds("claude-sonnet-5-5")).not.toContain("off");
       expect(getThinkingIds("claude-opus-4-7[1m]")).toContain("ultracode");
@@ -1223,6 +1232,7 @@ describe("ClaudeAgentSession features", () => {
 
   test.each([
     ["supported model", "claude-opus-4-8", { type: "disabled" }, undefined],
+    ["Haiku 5.5", "claude-haiku-5-5", { type: "disabled" }, undefined],
     ["unsupported model", "claude-fable-5", { type: "adaptive", display: "summarized" }, "high"],
     ["custom model", "openrouter/anthropic/claude-opus-4-8", undefined, undefined],
     ["provider default", null, undefined, undefined],

packages/server/src/server/agent/providers/claude/model-manifest.ts

@@ -170,10 +170,20 @@ export const CLAUDE_MODEL_MANIFEST = [
     effortLevels: CLAUDE_EFFORT_LEVELS.standard,
     supportsThinkingDisabled: true,
   },
+  {
+    id: "claude-haiku-5-5",
+    label: "Haiku 5.5",
+    description: "Haiku 5.5 · Fastest for quick answers",
+    minimumClaudeCodeVersion: "2.1.293",
+    defaultThinkingOptionId: "medium",
+    contextWindowMaxTokens: 1_000_000,
+    effortLevels: CLAUDE_EFFORT_LEVELS.xhigh,
+    supportsThinkingDisabled: true,
+  },
   {
     id: "claude-haiku-4-5",
     label: "Haiku 4.5",
-    description: "Haiku 4.5 · Fastest for quick answers",
+    description: "Haiku 4.5 · Previous release",
     contextWindowMaxTokens: 200_000,
   },
 ] as const satisfies readonly ClaudeModelManifestEntry[];

packages/server/src/server/agent/providers/claude/models.test.ts

@@ -39,7 +39,7 @@ async function createClaudeConfigDirWithRawSettings(settings: string): Promise<s
   return configDir;
 }
 
-function createCatalogClient(claudeCodeVersion = "2.1.284"): ClaudeAgentClient {
+function createCatalogClient(claudeCodeVersion = "2.1.293"): ClaudeAgentClient {
   return new ClaudeAgentClient({
     logger: createTestLogger(),
     resolveVersion: async () => claudeCodeVersion,
@@ -66,6 +66,7 @@ describe("getClaudeModels", () => {
       "claude-opus-4-6",
       "claude-sonnet-4-6[1m]",
       "claude-sonnet-4-6",
+      "claude-haiku-5-5",
       "claude-haiku-4-5",
     ]);
   });
@@ -100,6 +101,7 @@ describe("getClaudeModels", () => {
         ["claude-opus-4-6", 200_000],
         ["claude-sonnet-4-6[1m]", 1_000_000],
         ["claude-sonnet-4-6", 200_000],
+        ["claude-haiku-5-5", 1_000_000],
         ["claude-haiku-4-5", 200_000],
       ]),
     );
@@ -123,6 +125,12 @@ describe("getClaudeModels", () => {
     expect(getClaudeModels("2.1.284").map((model) => model.id)).toContain("claude-sonnet-5-5");
   });
 
+  it("gates Haiku 5.5 on Claude Code 2.1.293 without changing the default", () => {
+    expect(getClaudeModels("2.1.292").map((model) => model.id)).not.toContain("claude-haiku-5-5");
+    expect(getClaudeModels("2.1.293").map((model) => model.id)).toContain("claude-haiku-5-5");
+    expect(getClaudeModels("2.1.293").find((model) => model.isDefault)?.id).toBe("claude-opus-5-5");
+  });
+
   it("derives thinking options from model effort capabilities", () => {
     const models = new Map(getClaudeModels().map((model) => [model.id, model]));
 
@@ -192,6 +200,8 @@ describe("getClaudeModels", () => {
     ["claude-sonnet-5-20260101", true, "high"],
     ["claude-fable-5", false, "high"],
     ["claude-fable-5-1", false, "high"],
+    ["claude-haiku-5-5", true, "medium"],
+    ["claude-haiku-5-5-20261007", true, "medium"],
     ["claude-haiku-4-5", false, undefined],
     ["openrouter/anthropic/claude-opus-4-8", false, undefined],
     [null, false, undefined],
@@ -653,6 +663,51 @@ describe("Claude Sonnet 5.5 catalog", () => {
   });
 });
 
+describe("Claude Haiku 5.5 catalog", () => {
+  it("offers one Haiku 5.5 entry with a 1M context window", () => {
+    const haiku55Models = getClaudeModels()
+      .filter((model) => model.id.startsWith("claude-haiku-5-5"))
+      .map(({ id, label, contextWindowMaxTokens }) => ({ id, label, contextWindowMaxTokens }));
+
+    expect(haiku55Models).toEqual([
+      { id: "claude-haiku-5-5", label: "Haiku 5.5", contextWindowMaxTokens: 1_000_000 },
+    ]);
+  });
+
+  it("offers Off and every effort level with medium as the default", () => {
+    const haiku55 = getClaudeModels().find((model) => model.id === "claude-haiku-5-5");
+
+    expect(haiku55?.thinkingOptions?.map((option) => option.id)).toEqual([
+      CLAUDE_DISABLED_THINKING_OPTION_ID,
+      "low",
+      "medium",
+      "high",
+      "xhigh",
+      "max",
+      CLAUDE_ULTRACODE_THINKING_OPTION_ID,
+    ]);
+    expect(haiku55?.defaultThinkingOptionId).toBe("medium");
+    expect(
+      haiku55?.thinkingOptions?.filter((option) => option.isDefault).map((option) => option.id),
+    ).toEqual(["medium"]);
+  });
+
+  it("normalizes provider-prefixed runtime IDs", () => {
+    expect(normalizeClaudeRuntimeModelId("anthropic/claude-haiku-5-5")).toBe("claude-haiku-5-5");
+    expect(normalizeClaudeRuntimeModelId("us.anthropic.claude-haiku-5-5-v1:0")).toBe(
+      "claude-haiku-5-5",
+    );
+    expect(claudeManifestModelSupportsFastMode("claude-haiku-5-5")).toBe(false);
+  });
+
+  it("resolves suffixed and dated Haiku 5.5 IDs to the single catalog entry", () => {
+    expect(findClaudeModel("claude-haiku-5-5[1m]")?.id).toBe("claude-haiku-5-5");
+    expect(findClaudeModel("claude-haiku-5-5-20261007")?.id).toBe("claude-haiku-5-5");
+    expect(findClaudeModel("claude-haiku-5-5-20261007[1m]")?.id).toBe("claude-haiku-5-5");
+    expect(findClaudeModel("claude-haiku-5-5[1m]")?.contextWindowMaxTokens).toBe(1_000_000);
+  });
+});
+
 describe("claudeManifestModelSupportsFastMode", () => {
   it("keeps fast mode strict to first-party manifest model IDs", () => {
     expect(normalizeClaudeManifestModelId("openrouter/anthropic/claude-opus-4-8")).toBeNull();