[Workers AI] Restrict select models to Workers Paid plan (#32338)

Author: mchenco

src/components/models/ModelDetailPage.astro

@@ -26,6 +26,7 @@ import ModelBadges from "~/components/models/ModelBadges.astro";
 import ModelFeatures from "~/components/models/ModelFeatures.astro";
 import CopyableCode from "~/components/models/CopyableCode.astro";
 import ExampleCard from "~/components/models/ExampleCard.astro";
+import Render from "~/components/Render.astro";
 import SchemaDisplay from "~/components/models/SchemaDisplay.astro";
 import SchemaVariantTabs from "~/components/models/SchemaVariantTabs.tsx";
 import SchemaFileLinks from "~/components/models/SchemaFileLinks.astro";
@@ -140,6 +141,14 @@ if (model.name.includes("@cf/openai/gpt-oss")) {
 const author = authorData[model.author];
 const authorName = model.authorName;
 
+// Models that require the Workers Paid plan (not available on Workers Free).
+const workersPaidOnlyModels = [
+	"@cf/moonshotai/kimi-k2.6",
+	"@cf/moonshotai/kimi-k2.7-code",
+	"@cf/zai-org/glm-5.2",
+];
+const isWorkersPaidOnly = workersPaidOnlyModels.includes(model.name);
+
 // `hasSchema`: input must have at least one key.
 const hasSchema = Object.keys(model.schema.input).length > 0;
 const apiModes = detectApiModes(model.schema);
@@ -330,6 +339,12 @@ const headings: MarkdownHeading[] = [
 		)
 	}
 
+	{
+		isWorkersPaidOnly && (
+			<Render file="workers-paid-only-note" product="workers-ai" />
+		)
+	}
+
 	<ModelFeatures model={model} />
 
 	{

src/content/changelog/workers-ai/2026-07-28-models-require-workers-paid.mdx

@@ -0,0 +1,25 @@
+---
+title: Select models now require the Workers Paid plan
+description: Kimi K2.6, Kimi K2.7 Code, and GLM-5.2 are no longer available on the Workers Free plan.
+products:
+  - workers-ai
+date: 2026-07-28
+---
+
+We are limiting Workers Free plan access to a few resource-intensive models so we can prioritize capacity for the broader Workers AI user base. This helps everyone get a more reliable inference experience, with fewer `429` and `3040` (Out of Capacity) errors.
+
+The following models now require the [Workers Paid plan](/workers/platform/pricing/#workers):
+
+- [`@cf/moonshotai/kimi-k2.6`](/workers-ai/models/kimi-k2.6/)
+- [`@cf/moonshotai/kimi-k2.7-code`](/workers-ai/models/kimi-k2.7-code/)
+- [`@cf/zai-org/glm-5.2`](/workers-ai/models/glm-5.2/)
+
+On the Workers Free plan, requests to these models now return a `403` HTTP error ([internal error `5035`](/workers-ai/platform/errors/)) prompting you to upgrade. The Workers Paid plan starts at $5 per month and still includes the 10,000 free Neurons per day allocation, with usage beyond that billed at each [model's pricing](/workers-ai/platform/pricing/).
+
+Many models remain available on the Workers Free plan, including:
+
+- [`@cf/zai-org/glm-4.7-flash`](/workers-ai/models/glm-4.7-flash/)
+- [`@cf/google/gemma-4-26b-a4b-it`](/workers-ai/models/gemma-4-26b-a4b-it/)
+- [`@cf/nvidia/nemotron-3-120b-a12b`](/workers-ai/models/nemotron-3-120b-a12b/)
+
+For the full list, refer to the [Workers AI model catalog](/workers-ai/models/).

src/content/docs/workers-ai/platform/errors.mdx

@@ -20,6 +20,7 @@ Below is a list of Workers AI errors.
 | Model agreement                       | `5016`            | `403`         | User has not agreed to Llama3.2 model terms                                                                                                          |
 | Account blocked                       | `3023`            | `403`         | Service unavailable for account                                                                                                                      |
 | Account not allowed for private model | `3041`            | `403`         | The account is not allowed to access this model                                                                                                      |
+| Model requires Workers Paid plan      | `5035`            | `403`         | This model requires a Workers Paid plan. See [pricing](/workers-ai/platform/pricing/) for details.                                                   |
 | Deprecated SDK version                | `5019`            | `405`         | Request trying to use deprecated SDK version                                                                                                         |
 | LoRa unsupported                      | `5005`            | `405`         | The model `${this.model}` does not support LoRa inference                                                                                            |
 | Invalid model ID                      | `3042`            | `404`         | The model name is invalid                                                                                                                            |

src/content/docs/workers-ai/platform/pricing.mdx

@@ -25,6 +25,10 @@ All limits reset daily at 00:00 UTC. If you exceed any one of the above limits,
 | Workers Free | 10,000 Neurons per day | N/A - Upgrade to Workers Paid |
 | Workers Paid | 10,000 Neurons per day | $0.011 / 1,000 Neurons        |
 
+:::note
+Some models are not available on the Workers Free plan and require the [Workers Paid plan](/workers/platform/pricing/#workers). This applies to `@cf/moonshotai/kimi-k2.6`, `@cf/moonshotai/kimi-k2.7-code`, and `@cf/zai-org/glm-5.2`.
+:::
+
 ## What are Neurons?
 
 Neurons are our way of measuring AI outputs across different models, representing the GPU compute needed to perform your request. Our serverless model allows you to pay only for what you use without having to worry about renting, managing, or scaling GPUs.

src/content/partials/workers-ai/workers-paid-only-note.mdx

@@ -0,0 +1,9 @@
+---
+{}
+---
+
+:::caution[Requires Workers Paid]
+
+This model is not available on the [Workers Free plan](/workers/platform/pricing/#workers). To use it, upgrade to the [Workers Paid plan](/workers/platform/pricing/#workers).
+
+:::