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A general chatbot generates the numbers along with the sentence, so a hit rate it quotes may be a plausible-looking invention. Parlay Builder’s chat is mostly not a language model: it routes your question to an intent and then runs ordinary code against the same database the board reads, so the figures come back as cards with the sample and the source attached. A model is used for exactly two jobs: working out which question you asked, and reading a bet-slip screenshot you upload. It is never asked what a player’s hit rate is, because it does not know and we do.
No. It is research tooling. There is no wallet, no deposit, no wager and no settlement of anything with money in it. When you have decided on a bet you take it to your own sportsbook. That also means nothing here is advice: it describes what has already happened at a price you are being offered, and the decision stays yours. If betting has stopped being entertainment, help is at 1-800-GAMBLER.
Two feeds, kept separate. Results come from official box scores, the same per-player game logs the leagues publish, and every hit rate on the site is counted from those, with the number of games printed beside it. Prices come from DraftKings, FanDuel, BetMGM, Caesars, BetRivers, theScore Bet and Hard Rock Bet: 7 books, and the ingest drops any other book before the data lands, so no price on the site is from somewhere we cannot name. The landing page publishes the row counts per league and the timestamp they were measured at.
It is a comparison between two probabilities, not a rating of the player. One is how often that player has cleared that line in their own game log, shrunk toward the market in proportion to how little history stands behind it. The other is the probability the posted price implies, with the sportsbook’s margin left in. The letter grade is set by the gap between them at the current price. A high grade says the price looks generous against the history; it says nothing about tonight.
No. A high grade doesn’t guarantee a win; it means the model’s historical estimate sits above the probability the posted price implies. A letter is not a win rate and is not a ranking of bet quality. When the ordering was tested against results, no band of it returned a profit. And even a probability estimate that is exactly right loses whenever the odds say it should: a true 60% loses about 4 times in 10. An A can lose and an F can win, and neither outcome means the grade was wrong, because the grade is a statement about a price rather than a prediction about a result. Any tool that tells you otherwise is selling you something. Every individual bet can lose, and a parlay multiplies both the payout and the ways it can fail.
The structured parts cannot: hit rates, samples, lines, prices and grades are read out of the database by ordinary code and rendered as cards, so there is no step where a model could invent one. The written explanation around them is a different matter, and we would rather say so than pretend otherwise. Phrasing can be clumsy, an emphasis can be wrong, and a question can be misread as a different question. That is why every card shows the sample and the source underneath: if a sentence and a number disagree, the number is the one that came from the data.
Six kinds of thing: find what is worth looking at on tonight’s board, compare players or a whole market on one measure, explain what a number means, build a ticket from the scored board, diagnose a leg you are already considering, and track how the slips you saved settled. What it will not do is answer from data we do not have: weather, pitch mix, park factors, injuries and a correlation figure are all outside the feed, and it says so plainly rather than guessing.
NBA, NFL, MLB and WNBA, for both player props and team markets, priced across DraftKings, FanDuel, BetMGM, Caesars, BetRivers, theScore Bet and Hard Rock Bet. NHL is deliberately not offered: there is no scoring model behind it, so listing it would advertise something the product does not run. Coverage of a league is only as live as its season. An off-season league keeps its full history and has no prices, and the landing page shows which is which rather than leaving you to find out.
Without an account you can open every page, the full track record and the day’s top 3 ranked props. A free account takes no card. It adds building, saving and 3 AI actions a day on top of what a guest can already see. The free plan does not expire: the top 3 props, 3 AI actions a day and every slip you saved, for as long as you want it. There are 2 paid plans: Core ($9/month, or $90/year), Pro ($19/month, or $190/year). Checkout takes a card, and a first subscription gets 7 days before the first charge.
Yes. Plan changes and cancellation run through the billing portal from your account page, and a cancellation takes effect at the end of the period you have already paid for, so you keep the plan until then rather than losing it the moment you click. There is no cancellation fee and no minimum term. Your saved slips and their settled results stay on your account afterwards.
No, and we do not claim to. We measure the market's fair price and show the history behind every number, and we measured the claim itself rather than assuming it either way. Across roughly 96,000 graded props in an offline replay, the board tracked the de-vigged consensus of five books to within the margin those books charge, and no configuration tested cleared that margin. Historical testing showed that calibration alone is not enough to overcome sportsbook pricing, which is exactly why this product is built on price, context, sample quality and transparency rather than a claimed edge. What the work did buy is calibration: shrinkage and eligibility filtering materially improved calibration in the historical replay. Expected calibration error fell from 0.2319 to 0.0552 — though meaningful calibration error remains. So the accurate description is a fast research tool that shows its working. The full replay, figures and limits together, is on the methodology page.
Prices are re-read every couple of minutes for games starting soon, and each prop carries the age of the price it was scored against; anything that has not been re-quoted for six hours drops off the board rather than sitting there looking live. Box scores load four times a day, so a game that finished last night is in the hit rates by morning. Nothing here marks a market as suspended, though. A book can pull a line at any moment, so check the news before you act on a number.
Odds and lines come from licensed data feeds and refresh on a schedule; hit rates, edges and grades are Parlay Builder’s own calculations.