> ## Documentation Index
> Fetch the complete documentation index at: https://docs.apiyi.com/llms.txt
> Use this file to discover all available pages before exploring further.
# Deprecated Models
> View the list of upcoming and deprecated models, and migrate to recommended alternatives in time.
## Overview
This page lists models that are scheduled for deprecation or have already been deprecated, helping you plan migrations ahead of time.
If you are using a model that is scheduled for deprecation, please migrate to the recommended alternative as soon as possible to avoid service interruptions.
## ⚠️ Upcoming Deprecations
The following models are scheduled for deprecation. Please complete your migration before the listed date.
| Model Name | Model ID | Expected Deprecation Date | Recommended Alternative | Notes |
| ----------------------------------- | ------------------------------------- | ------------------------------- | ------------------------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Gemini 3 Pro Preview | `gemini-3-pro-preview` | Transparently aliased (2026-05) | `gemini-3.1-pro-preview` | **In sync with Google official**: since customers are already calling the legacy ID in production, requests to `gemini-3-pro-preview` are automatically routed to `gemini-3.1-pro-preview` to avoid disrupting live workloads. Migrate to the new ID at your convenience. |
| Gemini 2.0 Flash Lite | `gemini-2.0-flash-lite` | TBD | `gemini-2.5-flash` | Gemini 2.0 series sunset |
| Gemini 2.0 Flash Lite 001 | `gemini-2.0-flash-lite-001` | TBD | `gemini-2.5-flash` | Gemini 2.0 series sunset |
| Gemini 2.0 Flash | `gemini-2.0-flash` | TBD | `gemini-2.5-flash` | Gemini 2.0 series sunset |
| Gemini 2.0 Flash 001 | `gemini-2.0-flash-001` | TBD | `gemini-2.5-flash` | Gemini 2.0 series sunset |
| Gemini 2.0 Flash Lite Preview 02-05 | `gemini-2.0-flash-lite-preview-02-05` | TBD | `gemini-2.5-flash` | Preview version |
For detailed Gemini model deprecation information, refer to the official documentation: `ai.google.dev/gemini-api/docs/deprecations`
## 🚫 Deprecated Models
The following models have been deprecated and are no longer available. If your application is still calling these models, please switch to the alternative immediately.
| Model Name | Model ID | Deprecation Date | Alternative Model | Notes |
| -------------------------------------- | ----------------------------------------------------------------------------------------- | ---------------- | --------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------ |
| Kimi K2 | `kimi-k2` | 2026-05-28 | `kimi-k2.6` | Legacy Kimi K2 — migrate to the latest K2.6 |
| Kimi K2 128K | `kimi-k2-128k` | 2026-05-28 | `kimi-k2.6` | Legacy long-context K2; K2.6 ships with 256K context by default |
| Kimi K2 Instruct | `kimi-k2-instruct` | 2026-05-28 | `kimi-k2.6` | Legacy instruction-tuned K2 — migrate to K2.6 |
| DeepSeek V3.1 | `deepseek-v3-1-250821` | 2026-05-28 | `deepseek-v4-pro` / `deepseek-v4-flash` | DeepSeek V3 series retired — migrate to V4: pick Pro for heavy reasoning, Flash for high-throughput / cost-sensitive workloads |
| DeepSeek V3.1 Terminus | `deepseek-v3.1-terminus` | 2026-05-28 | `deepseek-v4-pro` / `deepseek-v4-flash` | DeepSeek V3 series retired — migrate to V4 |
| DeepSeek R1 (250528) | `deepseek-r1-250528` | 2026-05-28 | `deepseek-v4-pro` / `deepseek-v4-flash` | The R1 reasoning model has been superseded by V4 — use V4 Pro for reasoning workloads |
| GPT-4 | `gpt-4` | 2026-02-27 | `gpt-5.2` | Legacy model, discontinued |
| GPT-4 (32K) | `gpt-4-32k` | 2026-02-27 | `gpt-5.2` | Legacy model, discontinued |
| Sora 2 Video (Reverse) | `sora_video2` / `sora_video2-landscape` / `sora_video2-15s` / `sora_video2-landscape-15s` | 2026-04-26 | `sora-2-pro` (Official) | Reverse channel retired — migrate to [Sora 2 Official](/en/api-capabilities/sora-2-video-official) |
| Sora 2 Character Generation | `sora-character` | 2026-04-26 | `sora-2-pro` (Official) | Reverse channel retired — use [Sora 2 Official](/en/api-capabilities/sora-2-video-official) instead |
| Sora Image Generation/Edit (Reverse) | `sora_image` | 2026-04-26 | `gpt-image-2-all` (New Reverse) | Reverse channel retired — migrate to [GPT-Image-2-All](/en/api-capabilities/gpt-image-2-all/overview) |
| GPT-4o Image Generation/Edit (Reverse) | `gpt-4o-image` | 2026-04-26 | `gpt-image-2-all` (New Reverse) | Reverse channel retired — migrate to [GPT-Image-2-All](/en/api-capabilities/gpt-image-2-all/overview) |
## 🔗 Official Deprecation Pages by Provider
Quick links to each provider's official model lifecycle and deprecation pages, so you can cross-check the latest schedules directly at the source.
GPT model deprecation list and recommended replacements
Claude model deprecation schedule (official docs)
Gemini model sunset timeline and migration guidance
Grok model migration notes and retirement announcements
Bailian (Model Studio) Qwen model lifecycle and updates
DeepSeek API changelog and model migration notes
The links above redirect to each vendor's official documentation. We recommend bookmarking and checking them periodically to stay current with model retirement schedules.
This page is updated regularly. We recommend checking back periodically for the latest deprecation information.