25 posts tagged “calibration”.
When a prediction market prices a team at 87%, do those teams really win ~87% of the time? Using live-captured, outcome-labeled MLB books from Polymarket...
The most useful sports prediction tools of 2026: calibrated APIs, odds aggregators, model dashboards, and bot frameworks, ranked on transparency.
Plain-English guide to sports prediction APIs in 2026 — what they return, how authentication and rate limits work, what calibration means, and how to...
ZenHodl's calibrated win probabilities vs Polymarket's market odds across 5,000+ resolved games — where they agree, diverge, and what it means.
See how to turn calibrated ML probabilities into disciplined bets: position sizing, risk controls, and the honest limits of the math.
Why the pre-committed NBA Playoffs benchmark starts at the Conference Semis: adding First Round after tip-off would un-freeze a frozen test.
We just announced and on-chain anchored a 7-week head-to-head benchmark: ZenHodl's NBA model vs the live Polymarket consensus, every Conference Semis...
We surveyed 21 sports prediction providers — KenPom, BetQL, Sportradar, FiveThirtyEight, MoneyPuck, OddsJam, and 15 others — for the one number a...
Our NHL model replayed the 2025 Stanley Cup playoffs on pre-playoff data: 52 of 86 games correct (60.5%), with the Cup Final correctly read as a coin flip.
PSG, Arsenal, Atlético Madrid, and Bayern Munich are the 2025-26 UCL semifinalists. Our production club-soccer model (trained on 3,000+ matches, 75%...
Most 'AI picks' sites are ChatGPT wrappers around sportsbook lines. An honest 2026 guide to telling real ML predictors from narrative generators.
Most sports prediction models are accurate but not calibrated. Learn what calibration means, how to measure it, and how ZenHodl applies it across sports.
Most sports prediction platforms advertise accuracy that doesn't hold up to measurement. Here's how to evaluate one properly — with published ECE...
Our MLB model replayed the entire 2025 postseason on pre-playoff data: 28 of 47 correct (59.6%). Full breakdown, including every missed ALCS pick.
A 2026 honest answer to whether sports prediction apps actually work. Most 'expert picks' sites are post-hoc curation of sportsbook lines; about 5%...
Two days into the 2026 NHL playoffs. Our calibrated NHL model has Colorado and Tampa Bay as the Cup favorites, with Carolina close behind. Here's every...
Why picks sites say 'entertainment purposes only' — a legal admission — and how to find sites that publish real accuracy numbers instead.
Our NFL model replayed the 2025-26 playoffs on pre-playoff data only: 9 of 13 correct (69.2%), including Seattle over New England in Super Bowl LX.
After the 2025 NBA Finals wrapped with OKC beating Indiana in seven games, we ran our NBA win-probability model on all 84 postseason games using only...
Our first college football model backtested at -2.1c/trade over 728 simulated positions. The missing feature, the diagnosis, and the corrected numbers.
Our college basketball model backtested on all 5,345 non-tournament games of 2025-26: 68.2% accuracy, Brier 0.2064, ECE 4.39%, full reliability table.
Our NCAAMB model replayed all 67 games of March Madness 2026 on pre-tournament data: 48 correct (71.6%), 3-for-3 on the Final Four. Every miss listed.
Inside ZenHodl's NBA prediction engine: XGBoost models, team stats, real-time injury overlays, and isotonic calibration. How our ML system processes...
Our NBA bot had 65% accuracy and was losing money — a calibration bug left it confidently wrong. How we found it, and why calibration beats accuracy.
A 65%-accurate model can be a money loser. A 53%-accurate well-calibrated one prints money. Here's how to measure calibration with Brier score and ECE...