diff --git a/packages/ai/src/provider-error.ts b/packages/ai/src/provider-error.ts
index 35b9cff7425..9a854549239 100644
--- a/packages/ai/src/provider-error.ts
+++ b/packages/ai/src/provider-error.ts
@@ -32,6 +32,8 @@ const patterns = [
   /exceeds the limit of \d+/i,
   /exceeds the available context size/i,
   /greater than the context length/i,
+  // Hugging Face Text Generation Inference, e.g. Together
+  /`inputs` tokens \+ `max_new_tokens` must be <= \d+/i,
   /context window exceeds limit/i,
   /exceeded model token limit/i,
   /context[_ ]length[_ ]exceeded/i,
diff --git a/packages/ai/test/provider-error.test.ts b/packages/ai/test/provider-error.test.ts
index 98a94c1b143..1e4fdc5dd2e 100644
--- a/packages/ai/test/provider-error.test.ts
+++ b/packages/ai/test/provider-error.test.ts
@@ -13,6 +13,7 @@ describe("provider error classification", () => {
       "Prompt has 5,958,968 tokens, but the configured context size is 256,000 tokens",
       "Range of input length should be [1, 129024]",
       "Too many tokens",
+      "Input validation error: `inputs` tokens + `max_new_tokens` must be <= 131073. Given: 600035 `inputs` tokens and 16 `max_new_tokens`",
       "Token limit exceeded",
     ]