Which LLM should
you actually use?
WhichLLMs runs your real prompts across 200+ models and ranks them by quality, speed and cost — so you decide with data, not hype.
2,000+ tests run · 40+ builders on board · no credit card required
From question to answer
in three steps.
No benchmarks to read, no spreadsheets to maintain. Just your prompts and a ranked answer.
Describe your use case
Pick a ready-made template — support, coding, content, extraction — or bring your own prompts.
Run it on 200+ models
One click fans your prompts out to every major provider: OpenAI, Anthropic, Google, Mistral and more.
Get a ranked verdict
Quality, speed and cost scored side by side, with a clear recommendation you can act on immediately.
Built for decisions,
not dashboards.
Real benchmarks, not hype
Public leaderboards test someone else's prompts. WhichLLMs tests yours — live, against every model that matters, the moment you ask.
Cost, before you commit
See exactly what each model would cost at your real volume — before a single dollar hits your API bill.
Recommendations that explain themselves
Every verdict comes with the why: where a model won, where it fell short, and what that means for your use case.
Always current
New models land here as they ship. Re-run your suite in one click instead of re-benchmarking by hand every month.
See the magic
in action.
Watch how WhichLLMs analyzes your prompt across 200+ models and delivers instant recommendations.
"Write a professional email to a client explaining a project delay and proposing solutions."
Featured on
Got questions?
Everything you need to know about WhichLLMs.
Trusted by
40+ builders.
Join the developers and companies who've already transformed their AI decision-making process.
"I love this! The LLM market changes so fast, and WhichLLMs has been a game-changer for me to optimize costs and pick the right model."
"I used to do all this manually... such a time saver now!"
"So cool! Finally an easy way to find the right LLM for each use case."
"Game changer for our AI stack. Being able to compare quality, cost, and speed across 200+ models in one place has completely changed how we evaluate LLMs for production."
"We were spending hours benchmarking models manually. Now we can test different LLMs for our specific use cases and actually see the cost impact before committing. Saved us thousands already."
"Finally, a way to answer 'which model should I use?' with actual data. The market moves so fast that having real-time comparisons on performance and pricing is invaluable for making smart choices."
Don't waste another hour researching
Get instant AI model recommendations tailored to your needs