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

# Pioneer changelog: new models, features, and deprecations

> Track Pioneer platform updates, including new model releases, deprecations and sunsets, API changes, and bug fixes

# Changelog

<Update label="2026-08-10">
  # Deprecating legacy models:

  We're retiring several models from our catalog to ensure you always have access to the latest generation of highest quality and performant models. These models will stop accepting requests starting August 14, 2026.

  * **Deprecated:** `2026-08-11` — deprecated models continue to serve requests, but responses carry a `Deprecation` header and a `Link` header pointing to their replacement.
  * **Sunset:** `2026-08-14` — after this date, deprecated models stop serving inference requests entirely.

  ## Migration Guide

  * Claude Opus 4.1/4.5/4.6/4.7/4.8 — migrate to [**Claude Opus 5**](/concepts/models)
  * Grok 4.5, Qwen3.6 Max Preview, Qwen3.7 Max, Sakana Fugu Ultra — migrate to [**Claude Opus 5**](/concepts/models)
  * Poolside Laguna S 2.1, Meta Muse Spark 1.1 — migrate to [**Claude Opus 5**](/concepts/models)
  * Gemini 3 Flash, 3.1 Flash Lite, 3.5 Flash, 3.5 Flash Lite, 3.6 Flash — migrate to [**Claude Sonnet 5**](/concepts/models)
  * Claude Sonnet 4.5, 4.6, Qwen 3.6 Plus, 3.7 Plus — migrate to [**Claude Sonnet 5**](/concepts/models)
  * Mistral Medium, Mistral Medium 3.5, Mistral Devstral 2, Magistral Medium — migrate to [**Claude Sonnet 5**](/concepts/models)
  * Qwen 3.6 Flash, Ministral 3B, 14B, Mistral Devstral Small 2, Inkling Small — migrate to [**Claude Haiku 4.5**](/concepts/models)
  * GPT-4.1, 4.1 mini, 4.1 nano, 4o, 4o mini — migrate to [**GPT-5.5**](/concepts/models)
  * GPT-5 mini, 5 nano, 5.1, 5.3 Codex, 5.4, 5.4 mini, 5.4 nano — migrate to [**GPT-5.5**](/concepts/models)
  * Llama 3.2 1B, 3.2 3B, 3.2 3B Instruct, 3.3 70B Instruct — migrate to [**Nemotron 3.5 Nano**](/concepts/models)
  * Qwen2.5-Coder 0.5B, Qwen3 32B, 8B, 4B Base, 4B Instruct, 1.7B Base, Qwen3.5 9B, Qwen3.6 27B, Mistral 7B Instruct v0.3, Nemotron 3 Nano — migrate to [**Nemotron 3.5 Nano**](/concepts/models)
  * Gemma 3 4B (Pretrained), Gemma 4 12B IT, 31B IT, E2B IT, E4B IT, SmolLM3 3B Base — migrate to [**Nemotron 3.5 Nano**](/concepts/models)
  * DeepSeek V3 0324, V4 Pro, GPT-OSS 120B, 20B, LFM2 24B A2B — migrate to [**DeepSeek V4 Flash**](/concepts/models)
  * Mistral Codestral, Magistral Small, Ministral 8B, Mistral Nemo, Pixtral 12B — migrate to [**DeepSeek V4 Flash**](/concepts/models)
  * GLM 5.1, MiniMax M2.7, M3, MiMo V2.5, V2.5 Pro — migrate to [**GLM 5.2**](/concepts/models)
  * Mistral Small 4, Qwen3.6 35B A3B, Qwen3 235B A22B Instruct, Nemotron 3 Super, Ultra, DiffusionGemma 26B-A4B IT — migrate to [**GLM 5.2**](/concepts/models)
  * BGE-M3, Qwen3 Embedding 4B, 8B — migrate to [**`text-embedding-3-large`**](/concepts/models)
</Update>

<Update label="2026-08-03">
  # Zero Data Retention (ZDR) visibility on the Models page

  The Models page now shows a **ZDR** badge on every model that has at least one Zero Data Retention–compliant provider route, so you can filter for ZDR support without checking each model's routing individually.

  See [Trust & Safety](/trust-safety) for what ZDR means on Pioneer and how it's implemented per provider.
</Update>

<Update label="2026-08-03">
  # New model: DeepSeek V4 Flash 0731

  DeepSeek V4 Flash 0731 is now available in the Model Catalog.
</Update>

<Update label="2026-07-16">
  # New model: GLM 5.2

  GLM 5.2 is now available in the Model Catalog.
</Update>