Pre-training mitigations
Changes to AI training data before learning to reduce harmful outputs and bias.
Pre-training mitigations are adjustments made to the data that an AI model learns from. These changes happen before the main training process begins. The goal is to prevent the AI from learning or repeating harmful, biased, or undesirable behaviors.
For example, an AI image generator like DALL-E 2 might have its training data filtered to remove images that are violent, sexually explicit, or promote hate speech. This helps ensure the AI generates safer and more appropriate content when users give it prompts.
Pre-training mitigations involve data curation and preprocessing techniques applied before a model's primary training phase. These methods aim to identify and remove or modify data points that could lead to the generation of harmful, biased, or toxic content. Examples include filtering datasets for hate speech, removing personally identifiable information, or balancing representation across demographic groups.
Tradeoffs involve potential loss of valuable data, increased computational cost for data processing, and the challenge of defining and detecting all forms of undesirable content. The effectiveness is highly dependent on the quality of the filtering and the comprehensiveness of the dataset.
Recent discussions around AI safety and responsible development highlight the importance of pre-training mitigations. As frontier models become more capable, ensuring their outputs are safe and unbiased from the start is a key focus for labs like OpenAI.
- DALL·E 2 pre-training mitigationsOpenAI · OpenAI News ·
- OpenAI ChatGPT
- OpenAI uses pre-training mitigations to filter data for models like DALL-E 2, aiming to reduce harmful image generation and bias.
- Fine-tuning
- Fine-tuning happens after the main training phase and adjusts a mod
- Prompt engineering
- Prompt engineering involves crafting specific inputs to guid
- Constitutional AI
- Constitutional AI uses AI itself to align a model's behavior
The concept of mitigating risks through data preprocessing is fundamental to machine learning. Specific applications to large language and image models have become more prominent with the rise of frontier AI labs addressing safety concerns.
Try prompting an image generation model with a request that might produce unsafe content, such as depicting violence or hate symbols. Observe if the model refuses or generates a safe alternative, indicating that pre-training mitigations were likely in place.
The Playbook: reusable how-tos, prompts, configs and tips pulled out of the news.
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Questions people ask
- What kind of harmful content are pre-training mitigations trying to prevent?
- They aim to prevent outputs that are violent, sexually explicit, promote hate speech, or are otherwise biased and unsafe.
- Are pre-training mitigations foolproof?
- No, it's challenging to identify and remove all potentially harmful data, and new issues can emerge. They are one part of a broader safety strategy.
First seen on Subvolts Jun 28, 2022. Updated Sep 15, 2026. Written by an AI model from the items above and reviewed against them weekly; report an error.

