Prompt Efficiency Tools — Optimisers, Counters & Compression
Tools for measuring, optimising, and compressing AI prompts — token counters, prompt analysers, and efficiency benchmarks.
Efficiency Tools 🛠
Measure it, then cut it.
Token Counters & Analysers
| Tool | Type | What It Does | Cost |
|---|---|---|---|
| OpenAI Tokenizer | Web tool | Shows exact token count for GPT models | Free |
| Anthropic Token Counter | API utility | Counts tokens for Claude models | Free |
| tiktoken (Python) | Library | Programmatic token counting for OpenAI models | Free / open source |
| TokenCost | VS Code extension | Live token count and cost estimation in editor | Free |
| PromptPerfect | Web service | Analyses and automatically shortens prompts | Free tier + paid |
Prompt Optimisation Platforms
| Tool | What It Does | Best For |
|---|---|---|
| PromptPerfect | Rewrites prompts for efficiency and clarity | All users |
| DSPy | Programmatic prompt optimisation framework | Developers |
| OPRO (Google) | Optimises prompts using AI meta-prompting | Researchers |
| TextGrad | Gradient-based prompt optimisation | ML engineers |
| PromptFoo | Tests prompt variations and measures quality differences | Teams |
Cost Monitoring
| Tool | What It Does | Cost |
|---|---|---|
| Helicone | API proxy that logs and analyses LLM costs per prompt | Free tier |
| LiteLLM | Unified API with cost tracking across models | Open source |
| Portkey | AI gateway with token usage analytics | Free tier + paid |
| LangSmith | Full observability with cost breakdowns | Free tier + paid |
The Efficiency Stack
The recommended toolkit for lean prompting:
- Token counter — Know your baseline (OpenAI Tokenizer or tiktoken)
- Prompt analyser — Identify waste (PromptPerfect)
- A/B testing — Compare lean vs. original (PromptFoo)
- Cost monitoring — Track savings over time (Helicone)
- Prompt library — Store your optimised versions (Notion or Git)