AptSelect – A local desktop app to test LLMs side-by-side

Show HN: AptSelect – A local LLM client for parallel testing and evaluation

AptSelect – A local desktop app to test LLMs side-by-side is a business in show hn launch.

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I built AptSelect to stop writing throwaway scripts every time I needed to test how different LLMs handle specific instructions and prompt edge cases.What it does:Parallel Execution: Send a single prompt to OpenAI, Anthropic, Mistral, and Gemini simultaneously. Compare the outputs, latency, and exact token usage side-by-side.Batch Evaluations: Upload a CSV dataset to run bulk tests across multiple models at once.Manual Diagnostics: Grade outputs manually (Pass/Fail) and assign diagnostic tags (e.g., Hallucination, Format Error) to build a human-verified performance leaderboard.Local-first: API keys encrypted with your OS keyring; history stored in a local SQLite DB; no telemetry.I’m looking

The company sits in the show hn launch segment, where it competes on its core product or service.

Its current recorded stage is Show HN launch.

Website: aptselect.com