Can a large language model like Claude generate high-quality mock data?
MOSTLY AI put it to the test.
🟡 Claude (Sonnet 4.5) produced clean-looking tables — until the same data was requested again.
🟥 It broke. No consistency. No relational structure.
In contrast, the MOSTLY AI Assistant, built on the same LLM backbone but powered by a true data engine, delivered:
✔️ Consistent relational mock data
✔️ Full coherence across entities
✔️ Downloadable, validated CSVs ready for analytics
Claude creates text that looks like data.
MOSTLY AI creates data that acts like reality.
👉 Try the Assistant: https://app.mostly.ai
🧰 Explore the SDK: https://mostly.ai/synthetic-data-sdk
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