APIs for GPT, embeddings, images, audio and the Assistants/Agents stack.
Developer tools
Promptlayer
Free tierPlatform for prompt engineering, management, evaluation, and LLM observability.
Developer tools
What it does
Platform for prompt engineering, management, evaluation, and LLM observability.
In their own words: PromptLayer is the prompt management platform for AI teams. Version prompts, run LLM evals, and monitor agents in production with tracing, logs, and regression sets.
It's a developer tools tool. A free tier lets you try it before paying — useful when you're keeping costs low. Visit the website for the latest features and pricing.
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Free tier + paid plans
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