Klu
Benchmarks built from your own workflow to pick the right AI model
Overview
Klu, from Klu, Inc. in San Francisco, began as an LLM app platform for prompt versioning, evaluation and monitoring. Since 2026 its live app is an AI benchmarking service that turns a company workflow into an evaluation and compares models on quality, cost and latency, re-running when new models are released. Prices are not published.
Pricing
Pricing shown for reference only. These figures reflect RECATOOLS research as of 14 Oct 2026 and may be out of date or incomplete. This is not financial or purchasing advice — always confirm the current price on the provider’s official website before making any decision.
Use cases
What you can produce with Klu
- A company workflow turned into a benchmark with an evaluation plan and graded test cases
- Candidate models compared on the same tests for quality, cost per task and latency
- Answers graded by judge models against the plan's criteria, calibrated with approved examples
- Tracked benchmarks re-run automatically when a new model is released
- The lowest-cost model that clears a benchmark's quality threshold, selected for deployment
- Benchmarks created and run from the command line with the klu CLI
Klu has changed direction. The prompt-engineering and LLM-ops platform this page once reviewed has given way to an app that builds benchmarks from a company's own tasks, grades candidate models with judges, and picks the cheapest model that meets a quality threshold, re-running when a new model lands.
The idea is useful for teams that switch models often, but there is little to judge it by: no published prices, a main website behind a bot check, and no third-party coverage of the new product. Trial it before committing; teams wanting prompt management should choose another tool.
What we found
Klu is made by Klu, Inc., a small San Francisco company whose 2025 website named Stephen M. Walker II as chief executive and Stefan Sabev as chief technology officer. For its first years Klu sold an LLM app platform: a shared workspace for writing and versioning prompts, evaluating model changes, retrieval over company documents, fine-tuning and production analytics. In November 2025 its pricing page listed a $30-a-month Pro plan, a $997 Scale plan and a quoted Enterprise tier.
That product is not what Klu sells now. In early 2026 the klu.ai homepage was replaced by a generic LLM-ops page whose testimonials use names common in stock design templates, so this page does not quote them. By October 2026 the live application at app.klu.ai describes itself as AI benchmarks: it turns a company workflow into an evaluation, compares models on reviewed tests, and promises to find the best model for a use case on the day a new one is released. The interface walks a team through describing a task, drafting an evaluation plan with graded test cases, choosing models and judges, and running the benchmark again when a new model ships, then picking the lowest-cost model that clears the quality bar. A command-line tool and a cybersecurity evaluation mode are also present.
Pricing is the gap. The klu.ai site sits behind a Cloudflare check that refused both a script and a browser on 14 October 2026, and the new app shows plans with included credits only inside sign-up, with no published prices. An April 2026 archive of the old pricing page listed a Team plan at $99 a month, but that predates the change of direction and may no longer apply. The official SDKs last shipped in spring 2025.
Klu is worth a look for teams that pick between frontier models often and want that choice tested on their own workflows. Anyone who wants a prompt-management platform should look elsewhere.
Compiled by RECATOOLS from public sources: vendor documentation and pricing, code repositories and published reporting.
About this listing
This entry was compiled from publicly available data including Klu's official website, press releases, documentation, and reputable third-party publications. RECATOOLS is not affiliated with Klu unless explicitly stated.
Third-party AI tools update their pricing, features, availability, and policies frequently. Information here may be outdated by the time you read this — we make reasonable efforts to keep listings current, but cannot guarantee absolute accuracy.
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