> ## Documentation Index
> Fetch the complete documentation index at: https://docs.wandb.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Model lifecycle

> Learn about Serverless Inference model lifecycle and retirement


This page describes how models in the Serverless Inference catalog move through their lifecycle stages, how W\&B notifies you of upcoming changes, and which models are deprecated or retired. Use this information to plan migrations away from models that are scheduled for removal.

W\&B evaluates and releases new models as part of the Serverless Inference catalog on an ongoing basis.

W\&B reviews older models periodically and may retire them 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 isn't bound by our standard SLA or deprecation process.
* **Generally available**: The model is fully supported and recommended for use.
* **Deprecated**: The model is scheduled for removal. 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.

## Deprecation process

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

We also attempt to notify recent users of a deprecated model through 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`           |