Tokenwise

Tokenwise sits between your application and your LLM provider as a drop-in proxy that you adopt by changing one line, with no SDK rewrite. Every call is logged with its cost, token count, latency, errors and quality, and can be sliced by model, app or tag. It is observe-only by default, so nothing in production changes until you switch optimizations on, and provider keys are not stored.

The product looks for waste: oversized system prompts sent on every call, cache misses and prefix invalidations, and expensive models doing work a cheaper one can handle. It then proposes fixes such as semantic caching, prompt trims and model swaps. Each suggestion is tested by replaying your traffic against a quality threshold you set before it reaches you, and you either apply or ignore it, so nothing changes silently.

The dashboard includes a spend forecast, comparison and optimization views, tags, and alerts, and the site claims typical savings of 20 to 30 percent with under 50ms of added overhead. It is a hosted commercial service with a 7-day trial that needs no card.