diff --git a/.changeset/gemini-experimental.md b/.changeset/gemini-experimental.md
new file mode 100644
index 00000000..aedd1e13
--- /dev/null
+++ b/.changeset/gemini-experimental.md
@@ -0,0 +1,7 @@
+---
+"uptide": patch
+---
+
+Gemini is labelled experimental: in `fix --help`, in the `LLM:` line `fix` prints, and in the
+docs. Its evaluation runs on the storefront fixture failed on service errors (HTTP 503/429),
+so its migration quality is not established yet.
diff --git a/README.md b/README.md
index b00ad685..bab53eb1 100644
--- a/README.md
+++ b/README.md
@@ -222,7 +222,7 @@ was kept on the compiler's word and deserves a careful review.
 
 ## Choosing a model
 
-Assisted fixes support Anthropic, OpenAI and Gemini, with the same prompts, tool,
+Assisted fixes support Anthropic, OpenAI and Gemini (experimental), with the same prompts, tool,
 verification and publish gate. Set the chosen provider's key in your environment:
 `ANTHROPIC_API_KEY`, `OPENAI_API_KEY` or `GEMINI_API_KEY`. Never put keys in repository
 config or command arguments.
diff --git a/docs/cli.md b/docs/cli.md
index cf6d6a21..c79b6a03 100644
--- a/docs/cli.md
+++ b/docs/cli.md
@@ -175,7 +175,7 @@ gate are the same as for a verified dependency.
 
 ## Choosing a model
 
-Assisted fixes support Anthropic, OpenAI and Gemini, with the same prompts, tool,
+Assisted fixes support Anthropic, OpenAI and Gemini (experimental), with the same prompts, tool,
 verification and publish gate. Set the chosen provider's key in your environment:
 `ANTHROPIC_API_KEY`, `OPENAI_API_KEY` or `GEMINI_API_KEY`. Never put keys in repository
 config or command arguments.
diff --git a/packages/cli/src/cli.test.ts b/packages/cli/src/cli.test.ts
index e4aa1cc7..4709a369 100644
--- a/packages/cli/src/cli.test.ts
+++ b/packages/cli/src/cli.test.ts
@@ -679,7 +679,10 @@ it('selects each provider from its key, passes model and the universal budget, a
     const io = memoryIo({ cwd: pnpmGitRepo(), env: { [key]: 'test-key' } });
     expect(await run(['fix', 'zod'], io, engine)).toBe(0);
     expect(engine.calls[0]).toMatchObject({ provider, model, maxCostUsd: 1 });
-    expect(io.stderr()).toContain(`LLM: ${provider} / ${model}`);
+    // Gemini is experimental: its evaluation runs failed on service errors (docs/provider-evaluation.md).
+    expect(io.stderr()).toContain(
+      `LLM: ${provider}${provider === 'gemini' ? ' (experimental)' : ''} / ${model}`,
+    );
     expect(io.stderr()).toContain('LLM spend: no LLM calls.');
     expect(io.stderr()).not.toContain('test-key');
   }
diff --git a/packages/cli/src/cli.ts b/packages/cli/src/cli.ts
index 482de233..cccbf4e0 100644
--- a/packages/cli/src/cli.ts
+++ b/packages/cli/src/cli.ts
@@ -714,7 +714,7 @@ ${EXIT_CODES('a plan was made', 'not used', ';\n     or a dependency failed to a
       )
       .option(
         '--provider <name>',
-        'LLM provider: anthropic, openai or gemini (also UPTIDE_PROVIDER)',
+        'LLM provider: anthropic, openai or gemini (experimental) (also UPTIDE_PROVIDER)',
       )
       .option('--model <id>', 'LLM model ID (also UPTIDE_MODEL)')
       .option('--no-llm', 'rule-based fixes only: never send code to the LLM provider')
@@ -881,7 +881,7 @@ ${PRIVACY}`,
             else if (!llm) io.err('assisted fixes off (--no-llm): no code leaves this machine\n');
             else if (selection.available) {
               io.err(
-                `LLM: ${selection.provider} / ${selection.model} · budget $${maxCost.toFixed(2)}\n`,
+                `LLM: ${selection.provider}${selection.provider === 'gemini' ? ' (experimental)' : ''} / ${selection.model} · budget $${maxCost.toFixed(2)}\n`,
               );
               io.err(assistedNote(selection.provider));
               const price = priceFor(selection.provider, selection.model);