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feat(claude): add Fable 5.1 model

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Expose the new 1M-context model through the curated Claude catalog and normalize its dated and context-suffixed runtime IDs back to one canonical entry.
This commit is contained in:
Mohamed Boudra
2026-09-01 20:12:36 +02:00
parent c56638ea8c
commit 3377ffed29
3 changed files with 48 additions and 6 deletions
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packages/server/src/server/agent/providers/claude/agent.test.ts
+2
View File
@@ -424,6 +424,7 @@ describe("ClaudeAgentClient.fetchCatalog", () => {
});
expect(models.map((m) => m.id)).toEqual([
"claude-fable-5-1",
"claude-opus-5",
"claude-fable-5",
"claude-fable-5[1m]",
@@ -495,6 +496,7 @@ describe("ClaudeAgentClient.fetchCatalog", () => {
};
expect(getThinkingIds("claude-opus-5")).toContain("ultracode");
expect(getThinkingIds("claude-fable-5-1")).toContain("ultracode");
expect(getThinkingIds("claude-fable-5")).toContain("ultracode");
expect(getThinkingIds("claude-opus-4-8[1m]")).toContain("ultracode");
expect(getThinkingIds("claude-opus-4-8")).toContain("ultracode");
packages/server/src/server/agent/providers/claude/model-manifest.ts
+20 -5
View File
@@ -34,6 +34,13 @@ export const CLAUDE_DISABLED_THINKING_OPTION_ID = "off";
export const CLAUDE_ULTRACODE_THINKING_OPTION_ID = "ultracode";
export const CLAUDE_MODEL_MANIFEST = [
{
id: "claude-fable-5-1",
label: "Fable 5.1",
description: "Fable 5.1 · Most powerful model",
contextWindowMaxTokens: 1_000_000,
effortLevels: CLAUDE_EFFORT_LEVELS.xhigh,
},
{
id: "claude-opus-5",
label: "Opus 5",
@@ -50,7 +57,7 @@ export const CLAUDE_MODEL_MANIFEST = [
// COMPAT(claudeFable5OneMillionId): added in v0.3.0, remove after 2027-02-06 once pre-v0.3.0 app preferences are outside support.
aliases: ["claude-fable-5[1m]"],
label: "Fable 5",
description: "Fable 5 · Most powerful model",
description: "Fable 5 · Previous release",
minimumClaudeCodeVersion: "2.1.169",
contextWindowMaxTokens: 1_000_000,
effortLevels: CLAUDE_EFFORT_LEVELS.xhigh,
@@ -326,7 +333,7 @@ export function normalizeClaudeManifestModelId(value: string | null | undefined)
}
const runtimeMatch = trimmed.match(
/^(?:claude[-_ ])?(opus|sonnet|haiku)[-_ ]+(\d+)[-.](\d+)(?:\[1m\])?(?:[-_ ]+\d{8})?(?:\[1m\])?$/i,
/^(?:claude[-_ ])?(fable|opus|sonnet|haiku)[-_ ]+(\d+)[-.](\d+)(?:\[1m\])?(?:[-_ ]+\d{8})?(?:\[1m\])?$/i,
);
if (!runtimeMatch) {
return null;
@@ -371,7 +378,7 @@ export function normalizeClaudeRuntimeModelId(value: string | null | undefined):
}
const runtimeMatch = trimmed.match(
/claude[-_ ](opus|sonnet|haiku)[-_ ]+(\d+)[-.](\d+)(\[1m\])?/i,
/claude[-_ ](fable|opus|sonnet|haiku)[-_ ]+(\d+)[-.](\d+)(\[1m\])?/i,
);
if (!runtimeMatch) {
return null;
@@ -417,6 +424,14 @@ function normalizeMajorMinorClaudeModelId(
): string | null {
const family = familyValue.toLowerCase();
const suffix = hasOneMillionContext ? "[1m]" : "";
const candidate = `claude-${family}-${major}-${minor}${suffix}`;
return isClaudeManifestModelId(candidate) ? candidate : null;
const candidates = [
`claude-${family}-${major}-${minor}${suffix}`,
`claude-${family}-${major}-${minor}`,
];
for (const candidate of candidates) {
if (isClaudeManifestModelId(candidate)) {
return candidate;
}
}
return null;
}
packages/server/src/server/agent/providers/claude/models.test.ts
+26 -1
View File
@@ -50,6 +50,7 @@ describe("getClaudeModels", () => {
it("returns all claude models", () => {
const models = getClaudeModels();
expect(models.map((m) => m.id)).toEqual([
"claude-fable-5-1",
"claude-opus-5",
"claude-fable-5",
"claude-fable-5[1m]",
@@ -81,6 +82,7 @@ describe("getClaudeModels", () => {
expect(contextWindows).toEqual(
new Map([
["claude-fable-5-1", 1_000_000],
["claude-opus-5", 1_000_000],
["claude-fable-5", 1_000_000],
["claude-fable-5[1m]", 1_000_000],
@@ -160,6 +162,9 @@ describe("getClaudeModels", () => {
expect(models.get("claude-fable-5")?.thinkingOptions?.map((option) => option.id)).not.toContain(
CLAUDE_DISABLED_THINKING_OPTION_ID,
);
expect(
models.get("claude-fable-5-1")?.thinkingOptions?.map((option) => option.id),
).not.toContain(CLAUDE_DISABLED_THINKING_OPTION_ID);
expect(models.get("claude-haiku-4-5")?.thinkingOptions).toBeUndefined();
});
@@ -170,6 +175,7 @@ describe("getClaudeModels", () => {
["claude-sonnet-5[1m]", true, "high"],
["claude-sonnet-5-20260101", true, "high"],
["claude-fable-5", false, "high"],
["claude-fable-5-1", false, "high"],
["claude-haiku-4-5", false, undefined],
["openrouter/anthropic/claude-opus-4-8", false, undefined],
[null, false, undefined],
@@ -458,7 +464,7 @@ describe("Claude Opus 5 catalog", () => {
describe("Claude Fable 5 catalog", () => {
it("offers one selectable Fable 5 entry and a compatibility entry for old apps", () => {
const fable5Models = getClaudeModels()
.filter((model) => model.id.startsWith("claude-fable-5"))
.filter((model) => model.id === "claude-fable-5" || model.id === "claude-fable-5[1m]")
.map(({ id, aliases, isSelectable, label, contextWindowMaxTokens }) => ({
id,
aliases,
@@ -491,6 +497,24 @@ describe("Claude Fable 5 catalog", () => {
});
});
describe("Claude Fable 5.1 catalog", () => {
it("offers one Fable 5.1 entry with a 1M context window", () => {
const fable51Models = getClaudeModels()
.filter((model) => model.id.startsWith("claude-fable-5-1"))
.map(({ id, label, contextWindowMaxTokens }) => ({ id, label, contextWindowMaxTokens }));
expect(fable51Models).toEqual([
{ id: "claude-fable-5-1", label: "Fable 5.1", contextWindowMaxTokens: 1_000_000 },
]);
});
it("resolves suffixed and dated Fable 5.1 IDs to the catalog entry", () => {
expect(findClaudeModel("claude-fable-5-1[1m]")?.id).toBe("claude-fable-5-1");
expect(findClaudeModel("claude-fable-5-1-20260901")?.id).toBe("claude-fable-5-1");
expect(findClaudeModel("claude-fable-5-1-20260901[1m]")?.id).toBe("claude-fable-5-1");
});
});
describe("claudeManifestModelSupportsFastMode", () => {
it("keeps fast mode strict to first-party manifest model IDs", () => {
expect(normalizeClaudeManifestModelId("openrouter/anthropic/claude-opus-4-8")).toBeNull();
@@ -502,5 +526,6 @@ describe("claudeManifestModelSupportsFastMode", () => {
expect(claudeManifestModelSupportsFastMode("claude-opus-5")).toBe(true);
expect(claudeManifestModelSupportsFastMode("claude-sonnet-5")).toBe(false);
expect(claudeManifestModelSupportsFastMode("claude-fable-5")).toBe(false);
expect(claudeManifestModelSupportsFastMode("claude-fable-5-1")).toBe(false);
});
});