[P] VizPy: DSPy-Compatible Prompt Optimizer That Learns From Failures Automatically.

VizPy is a prompt optimization tool that learns from failures automatically. It reduces prompt failure rates by turning errors into executable rules, offering a drop-in replacement for DSPy.

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Pricing

Freemium · Paid · Enterprise

Free tier

Yes

API

Yes

Skill level

Technical

About

What is [P] VizPy: DSPy-compatible prompt optimizer that learns from failures automatically.?

VizPy is a DSPy-compatible prompt optimizer designed to automatically learn from prompt failures and significantly reduce failure rates. It achieves this by converting errors into executable rules, eliminating the need for manual prompt tweaking. The tool offers two primary optimizers: PromptGrad, which is best for generation tasks and continuous metrics by running epoch-based failure analysis and accumulating correction rules; and ContraPrompt, ideal for classification tasks with clear right/wrong labels by mining contrastive pairs. VizPy provides a simple API, allowing users to pass any dspy.Module and receive an optimized module with improved instructions and plain-English explanations of added rules. It outperforms GEPA on various benchmarks, including BBH, HotPotQA, and GPQA Diamond.

Best used for

Ideal for developers and data scientists who need to automatically optimize LLM prompts, reduce failure rates in generation and classification tasks, and enhance the accuracy of their AI models. Especially valuable for those seeking a drop-in replacement for DSPy with superior benchmark performance.

Common actions

optimize prompts

reduce prompt failures

improve LLM performance

automate prompt tuning

Capabilities

Key features

PromptGrad optimizer
ContraPrompt optimizer
Error-to-rule conversion
DSPy compatibility
Automated failure learning
Benchmark outperformance

Target Audience

developerdata scientistproduct manager

Integrations

Not yet documented

Pricing & Plans

Freemium · Paid · Enterprise

Freemium

FAQs

What is the difference between PromptGrad and ContraPrompt?

PromptGrad is designed for generation tasks and continuous metrics, using epoch-based failure analysis to accumulate correction rules. ContraPrompt is best suited for classification tasks with clear right/wrong labels, as it mines contrastive pairs to extract rules that differentiate correct from incorrect attempts.

How does VizPy compare to other prompt optimization tools like GEPA?

VizPy claims to outperform GEPA on every benchmark, including BBH, HotPotQA, and GPQA Diamond. It offers a unique mechanism of turning errors into executable rules, providing a more precise and automated approach to prompt correction.

What are the pricing tiers for VizPy?

VizPy offers a Free tier with 10 optimization runs. The Pro plan costs $20/month for 200 runs, and the Enterprise plan is $200/month for 1,000 runs. All plans include access to both PromptGrad and ContraPrompt optimizers.

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