fix(ai): recognise Claude 5 and Fable models as vision-capable

The Anthropic vision check listed the Claude 3 and 4 families by prefix,
so a key pinned to claude-sonnet-5, claude-opus-5 or a Fable model was
told the provider cannot read images, and lab and document OCR refused
the upload even though the model handles image and PDF blocks.

Replace the per-release prefix list with a rule: any claude-<tier>-<major>
slug from the 4 family upward, plus every claude-fable-* model, counts as
vision-capable. Claude 3 handling is unchanged. The Settings preset list
gains claude-sonnet-5 and claude-opus-5 alongside the existing entries.

CHANGELOG.md

@@ -17,6 +17,12 @@
   plain instruction to reply with a single JSON object and nothing else,
   and the reply is narrowed to the object body on the way out, so a fenced
   or prefixed answer still parses. Reported independently by @sweidinger.
+- **Lab and document OCR no longer refuse a current Claude model.** The
+  vision check knew the Claude 3 and 4 families by name, so a key pinned to
+  `claude-sonnet-5`, `claude-opus-5` or a Fable model was told the provider
+  cannot read images even though it can. Any Claude tier from the 4 family
+  upward, and every Fable model, now counts as vision-capable. The model
+  preset list in Settings also offers `claude-sonnet-5` and `claude-opus-5`.
 
 ## [1.38.1] — 2026-09-01
 

src/components/settings/ai/shared.ts

@@ -101,6 +101,8 @@ export const OPENAI_MODEL_PRESETS = [
 export const ANTHROPIC_MODEL_PRESETS = [
   "claude-sonnet-4-6",
   "claude-opus-4-7",
+  "claude-sonnet-5",
+  "claude-opus-5",
   "claude-haiku-4-5",
   "claude-3-5-sonnet-latest",
 ] as const;

src/lib/ai/__tests__/vision-capability.test.ts

@@ -21,6 +21,19 @@ describe("supportsVisionForConfig", () => {
     }
   });
 
+  it("accepts current Claude 5-generation and Fable pins for anthropic", () => {
+    for (const model of [
+      "claude-sonnet-5",
+      "claude-opus-5",
+      "claude-haiku-4-5",
+      "claude-fable-5",
+      "claude-fable-5-1",
+      "claude-opus-4-8",
+    ]) {
+      expect(supportsVisionForConfig("anthropic", model)).toBe(true);
+    }
+  });
+
   it("rejects legacy / text-only anthropic models", () => {
     expect(supportsVisionForConfig("anthropic", "claude-2.1")).toBe(false);
     expect(supportsVisionForConfig("anthropic", "claude-instant-1")).toBe(

src/lib/ai/vision-capability.ts

@@ -15,27 +15,33 @@
 
 /**
  * Anthropic vision models. The Messages API `image` + `document` blocks are
- * accepted by the whole Claude 3 family (3 / 3.5 / 3.7) and the Claude 4
- * family. An older `claude-2*` / `claude-instant*` pin is text-only.
+ * accepted by the whole Claude 3 family (3 / 3.5 / 3.7) and by every family
+ * from Claude 4 upward, Fable included. An older `claude-2*` /
+ * `claude-instant*` pin is text-only.
  *
  * The bare `claude-3-opus` / `claude-3-sonnet` / `claude-3-haiku` prefixes are
  * listed explicitly: a self-hoster pinned to e.g. `claude-3-opus-20240229`
- * reads images, but the `claude-3-5` prefix does not match it.
+ * reads images, but the `claude-3-5` prefix does not match it. From Claude 4
+ * on the slug is `claude-<tier>-<major>[-<minor>]`, so a rule on the major
+ * version covers `claude-sonnet-4-6`, `claude-opus-5`, `claude-haiku-4-5` and
+ * whatever ships next without this list growing per release.
  */
 function anthropicSupportsVision(model: string): boolean {
   const m = model.toLowerCase();
-  return (
+  if (
     m.startsWith("claude-3-opus") ||
     m.startsWith("claude-3-sonnet") ||
     m.startsWith("claude-3-haiku") ||
     m.startsWith("claude-3-5") ||
     m.startsWith("claude-3.5") ||
     m.startsWith("claude-3-7") ||
-    m.startsWith("claude-3.7") ||
-    m.startsWith("claude-sonnet-4") ||
-    m.startsWith("claude-opus-4") ||
-    m.startsWith("claude-haiku-4")
-  );
+    m.startsWith("claude-3.7")
+  ) {
+    return true;
+  }
+  if (m.startsWith("claude-fable-")) return true;
+  const tiered = m.match(/^claude-(?:sonnet|opus|haiku)-(\d+)/);
+  return tiered !== null && Number(tiered[1]) >= 4;
 }
 
 /**