Spray Tools — Multi-Prompt Testing Platforms
Platforms and tools built for sending prompts to multiple models, comparing results side-by-side, and running A/B tests.
Spray Tools 🛠
Compare everything. Pick the winner.
Multi-Model Comparison Platforms
| Tool | Models Supported | Side-by-Side | Cost |
|---|---|---|---|
| ChatHub | GPT-4o, Claude, Gemini, Perplexity, + more | Yes (2-6 models) | Free / $5/mo |
| TypingMind | All major APIs | Yes (conversation branching) | $39 one-time |
| Poe (Quora) | GPT-4o, Claude, Gemini, Llama, + custom | Yes (2 models) | Free / $20/mo |
| msty | All via API | Yes | Free (open source) |
| OpenRouter | 100+ models | Via Playground | Pay-per-token |
A/B Testing & Evaluation
| Tool | What It Does | Best For |
|---|---|---|
| PromptFoo | Automated prompt evaluation across models | Developers, teams |
| Humanloop | Prompt versioning with quality scoring | Production apps |
| Braintrust | LLM evaluation and experiment tracking | ML teams |
| Weights & Biases Prompts | Track and compare prompt experiments | Researchers |
| Langfuse | Open-source LLM observability and comparison | Self-hosted teams |
API Batch Testing
For developers running spray tests programmatically:
| Tool | What It Does | Cost |
|---|---|---|
| LiteLLM | Unified API for 100+ models — one line of code to test any model | Open source |
| OpenRouter | Single API endpoint for all major models | Per-token pricing |
| Portkey | AI gateway with automatic fallback and comparison | Free tier |
| Martian | Automatic model routing — sends to the best model per task | Per-token |
The Spray Stack
Recommended setup by user type:
| User Type | Recommended Tools |
|---|---|
| Casual user | ChatHub (browser extension) + 2-3 AI subscriptions |
| Power user | TypingMind + all major model subscriptions |
| Developer | LiteLLM + PromptFoo + Langfuse |
| Team/Enterprise | Portkey + Braintrust + model API keys |