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Test prompts across models simultaneously

Pick your models. Hit run. Results appear side-by-side. The best prompt on GPT-4 might not be the best prompt on Claude. The only way to know is to test.

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Playground
Playground interface showing side-by-side model comparison

Everything you need to test prompts at scale

Multi-model comparison

Run the same prompt against GPT-4, Claude, and Gemini simultaneously. Results appear side-by-side so you can see which model handles your use case best. When a new model launches, add it and retest everything.

Learn about model comparison
Model Comparison
Side-by-side model comparison in the Playground

Real-time testing with evals

Same prompt, different inputs. Pass in five customer profiles and see how each model handles edge cases. Compare prompt iterations side-by-side. Load two versions, run both, see which performs better. No guessing.

Explore real-time testing
Eval Runner
Running evaluations across multiple inputs in the Playground

Save and share test states

Send a link and your team sees prompts, model configs, and results exactly as you left them. They iterate from there. No screenshots, no copy-pasting, no "what settings were you using?" Access your full prompt library and compare against previous versions.

See sharing in action
Share State
Sharing playground state with a team

Test before you ship

The best prompt on GPT-4 might not be the best prompt on Claude. The only way to know is to test.

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