OpenAI chat models gpt-4.1, gpt-4.1-mini and gpt-4.1-nano, which accept images and text and return text. They are deprecated in Azure: nano retires on 14 October 2026, while the full and mini models follow on 14 April 2027.
Read more: Microsoft Learn
In the Ultra Transcenders books
Each book explains GPT-4.1 in context, with comparison tables and the common traps.
Terms in this definition
- GPT-4.1-mini
An Azure OpenAI chat model that is quicker and cheaper, accepts images as well as text and offers a context window of roughly 1M tokens, smaller on certain deployment types. It can be fine-tuned with SFT or DPO.
- RETURN
Comes after the VAR definitions in DAX and holds the expression whose value the formula gives back. While debugging, pointing it at one variable for a while is a useful trick.
Related terms
- Azure OpenAI in Foundry Models
OpenAI models offered by Azure as a fully managed service with guardrails built in, covering GPT-4.1, GPT-5, o-series, image, audio and embeddings. Rather than running infrastructure, you pick a deployment type.
- Vision-enabled chat model
A chat model able to understand images included in the prompt, such as GPT-4o, GPT-4.1, the GPT-5 series and o-series models. An application layer cannot add this capability to a model that handles only text.
- Vision fine-tuning
Fine-tuning where the JSONL messages include images as URLs or base64. Only gpt-4o (2024-08-06) and gpt-4.1 (2025-04-14) support it, and images showing people, faces or CAPTCHAs are dropped.