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Data Lab allows you to import historical chat completion logs into structured datasets for analysis and reuse.

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Source of chat completions

Chat completions may come from:
  • API requests to Nebius Token Factory
  • Playground interactions
Each completion may include:
  • Input messages (system, user, assistant, tool)
  • Model outputs
  • Metadata (model name, timestamps, token usage, errors, etc.)

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Zero Data Retention (ZDR) behavior

Data import is subject to Zero Data Retention settings:
  • When ZDR is enabled, chat completion logs are not stored.
  • When ZDR is disabled, chat completion logs are collected and available for import.
  • If ZDR was enabled during part of the selected time range, only the periods with ZDR disabled will be imported.
Importing a time range where ZDR was fully enabled will result in an empty import.

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Import workflow

  1. Click Import completions
  2. Specify the time range, model, and a name for the import
  3. Click Start import to initiate the process
  4. Imported completions appear as a new dataset in Datasets tab inside Data Lab
Imported datasets can then be:
  • Filtered and transformed by sql
  • Downloaded
  • Used for batch inference or fine-tuning

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Typical use cases

  • Reviewing real production prompts and responses
  • Debugging incorrect or unexpected model behavior
  • Building evaluation datasets from real usage
  • Preparing training data without manual logging