# Moonshot AI Moonshot v1 128k — deprecation status

> Yes — Moonshot AI deprecated Moonshot v1 128k and shuts it down on August 31, 2026 (in 28 days). The recommended replacement is Kimi K2.6.

The long-context member of Moonshot's original API family, and the model that built the company's reputation for handling very long documents back when 128k was a headline number. Context length was part of the model id rather than a runtime property, which is why there are three of these. Closed to new users after the K3 launch and sunsetting on 31 August, printed in Moonshot's docs without a year.

## Facts

| Field | Value |
| --- | --- |
| Provider | Moonshot AI |
| Model id | `moonshot-v1-128k` |
| Status | Deprecated |
| Shutdown | August 31, 2026 (in 28 days) |
| Last verified | August 3, 2026 |

## Replacement

- **Kimi K2.6** (`kimi-k2.6`) · recommended — https://modeldeprecations.dev/moonshot/kimi-k2.6
  - Nothing in the current range encodes context length in the id. Pick the model, not the window - K2.6 gives you 256k and K3 gives you 1M.
  - Parameters it accepts: https://modelparams.dev/models/moonshot/kimi-k2.6

```diff
- "model": "moonshot-v1-128k"
+ "model": "kimi-k2.6"
```

## FAQ

### When will Moonshot AI Moonshot v1 128k shut down?

Moonshot AI Moonshot v1 128k is scheduled to shut down on August 31, 2026, in 28 days.

### What replaces Moonshot AI Moonshot v1 128k?

Moonshot AI recommends Kimi K2.6 (`kimi-k2.6`) as the replacement for Moonshot AI Moonshot v1 128k. Nothing in the current range encodes context length in the id. Pick the model, not the window - K2.6 gives you 256k and K3 gives you 1M.

### Is Moonshot AI Moonshot v1 128k still available?

Yes, for now. Moonshot AI Moonshot v1 128k is deprecated but still answers requests until August 31, 2026. Deprecated models get no further updates and are the first to lose capacity.

### How do I migrate from Moonshot AI Moonshot v1 128k to kimi-k2.6?

Swap the model id in your API call: replace "moonshot-v1-128k" with "kimi-k2.6". Nothing in the current range encodes context length in the id. Pick the model, not the window - K2.6 gives you 256k and K3 gives you 1M.

## Sources

- [Kimi model list](https://platform.kimi.ai/docs/models) — accessed 2026-08-03

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Canonical page: https://modeldeprecations.dev/moonshot/moonshot-v1-128k
JSON: https://modeldeprecations.dev/api/v1/models/moonshot/moonshot-v1-128k.json