Lexi
AI cost optimization platform — reduces token usage by up to 91% without changing your code
| What is it | AI cost optimization platform — reduces token usage by up to 91% without changing your code |
|---|---|
| Pricing | Paid |
| Free tier | Yes |
| Platform | Web Application |
| API | Yes |
| Works with | IFTTT |
| Best for | reducing AI API costs for chat applications, optimizing long conversation sessions with LLMs |
| Domain registered | 2026 |
Data updated Aug. 1, 2026
What does Lexi do?
Lexi is an AI cost optimization platform that sits between your application and AI providers like OpenAI, Anthropic, and Google. It uses a proprietary technology called STONE (Semantic Token Optimization and Natural Encoding) to restructure conversation context before sending it to AI models. This restructuring reduces token usage by up to 91% while maintaining the same quality of responses. The system works by keeping context bounded, so long conversations don't accumulate token bloat with each turn.
Lexi functions as a proxy that requires just one code change—swapping your provider's base URL with Lexi's endpoint. It supports 33 models across 7 providers and maintains full compatibility with streaming, tool calls, and structured outputs. The pricing model is unique: you only pay when Lexi saves you money, with the platform taking 40% of your savings. If no token reduction occurs, you pay exactly what you would have paid going direct to the provider.
This tool is particularly valuable for teams building AI-powered applications with extended conversations, such as coding assistants, customer support bots, or creative writing tools. Companies spending significant amounts on AI API calls can achieve substantial cost reductions without modifying their application logic or sacrificing response quality. The platform's O(1) resource usage means it scales efficiently regardless of conversation length.
Key features
What makes it stand outWho is Lexi for?
Who benefits most from this toolPricing
Free tier available — start without a credit cardFree
- 10,000 API keys
- 0 lifetime spend
- 120 requests per minute
- No card required
- 33 Models supported
- 0 facts lost
Trust & presence
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