> ## Documentation Index
> Fetch the complete documentation index at: https://wb-21fd5541-docs-1917.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Model Lifecycle

> Learn about Serverless Inference model lifecycle and retirement


New models are frequently evaluated and released as part of the Serverless Inference catalog.

Older models are regularly reviewed and may be retired to prioritize the most in-demand and highest-quality offerings.

## Model lifecycle stages

Models in Serverless Inference use the following terminology for the stages of their lifecycle:

* **Experimental**: The model is available for initial experimentation, but is not bound by our standard SLA or deprecation process.
* **Generally available**: The model is fully supported and is recommended for use.
* **Deprecated**: The model is scheduled for removal. Customers should update to a recommended replacement as soon as possible.
* **Retired**: The model is no longer available. Any requests to retired models fail and return an `HTTP 404` status code for all requests.

## Deprecation process

When deprecating a generally available model, W\&B will provide at least two weeks of notice on this page before the model is retired.

We additionally attempt to notify recent users of a deprecated model via email
and provide recommendations for replacement models.

Models that are in the **deprecated** stage continue to serve requests.

## Deprecated models

The following Serverless Inference models are **deprecated**:

*None currently*

## Retired models

The following Serverless Inference models are **retired**:

| Retirement date | Model ID                                    | Recommended replacement       |
| --------------- | ------------------------------------------- | ----------------------------- |
| 2026-05-11      | `zai-org/GLM-5-FP8`                         | `zai-org/GLM-5.1`             |
| 2026-04-21      | `meta-llama/Llama-4-Scout-17B-16E-Instruct` | `Qwen/Qwen3.5-35B-A3B`        |
| 2026-03-04      | `deepseek-ai/DeepSeek-R1-0528`              |                               |
| 2026-03-04      | `deepseek-ai/DeepSeek-V3-0324`              |                               |
| 2026-03-04      | `moonshotai/Kimi-K2-Instruct`               | `moonshotai/Kimi-K2.5`        |
| 2026-03-04      | `moonshotai/Kimi-K2-Instruct-0905`          | `moonshotai/Kimi-K2.5`        |
| 2026-03-04      | `Qwen/Qwen2.5-14B-Instruct`                 | `OpenPipe/Qwen3-14B-Instruct` |
| 2026-03-04      | `zai-org/GLM-4.5`                           | `zai-org/GLM-5-FP8`           |