Braintrust
Evaluate AI applications and compare prompt versions.
What it is
An evaluation platform where you define datasets and scoring functions to measure whether a change of prompt or model makes the results better or worse. It includes a collaborative playground and execution traces.
Best for
Avoiding regressions while iterating on prompts.
What the free plan includes
- 1 GB of logs per month
- 10,000 experiment scores
- Limited data retention
Free plans change often. Confirm the limits on the official page before deciding.
Hugging Face
PickCommunity models, datasets and runnable demos.
Free for public models, datasets and Spaces
Google AI Studio
PickPrototype with the Gemini models from your browser.
Free studio access and a free API tier
NVIDIA NIM
Hosted APIs for AI models optimised by NVIDIA.
Free API credits for prototyping