SharperSunday · Compare
ChatGPT is smart. It just doesn't know your league.
Both are smart — that was never the question. ChatGPT answers about fantasy football in general, from a training snapshot and whatever you remember to type in. SharperSunday reads your live Sleeper roster, your scoring rules, and your win window before it says a word. Same reasoning, your league wrapped around it.
Same question. Two answers.
You ask: “Straight up — should I trade Josh Allen for Ja'Marr Chase?”
Generic LLM
“Chase is the safer long-term dynasty asset — a generational receiver with years of WR1 production ahead. Allen is elite, but quarterback is the easiest position to replace in fantasy. Most formats lean Chase here.”
Sound logic — for the format it's assuming. It doesn't know you play Superflex, where that math flips.
SharperSunday
“In your Superflex league you start two QBs, so you can't stream the position — an elite quarterback is the most valuable asset in dynasty. On real Superflex trades, Allen grades out as the #1 value in your format, a notch above Chase. Hold him; if you make this deal, get more back.”
It reads your format as Superflex and prices both players on real Superflex trades. Same question, your league's answer.
Then why not just use ChatGPT? It's free.
Fair question — and the honest answer is that the reasoning was never the hard part. ChatGPT is good at it, and so are we: SharperSunday runs on Claude. What you can't get for free is your league wired into the model — your live roster, your exact scoring, every team's win window, and real trade-based Edge values. That context is the product. The AI is just the engine.
Side-by-side
| Capability | Generic LLM | SharperSunday |
|---|---|---|
| Frontier AI reasoning Both run on top-tier models — a generic LLM on its own, SharperSunday on Claude. The reasoning was never the gap. | ✓ | ✓ |
| Reads your live roster Pulls your current Sleeper roster before answering — no copy-pasting your team every time. | ✗ | ✓ |
| Knows your scoring rules Accounts for PPR variants, TE premium, superflex, and custom settings automatically. | ✗ | ✓ |
| Prices trades on real values Values players with Edge, an in-house model trained on real Sleeper trades — not standard-scoring guesswork. | ✗ | ✓ |
| Knows your win window Classifies every team as rebuilding, rising, or contending and tailors the call to where you are. | ✗ | ✓ |
| Works from live data Live roster and nightly-updated values every time you ask — not a training snapshot that's months behind. | ✗ | ✓ |
| Knows your leaguemates Factors in your league's real transaction history and rival tendencies. | ✗ | ✓ |
| No re-explaining your league Your settings load on every question, so you never restate the format to get an answer. | ✗ | ✓ |
The short version
A generic chatbot gives you a reasonable-sounding answer for some average league — the kind of take you could get from any fantasy podcast. SharperSunday already knows who's on your roster, that you play Superflex full-PPR two seasons from your contending window, and what those players are actually worth in real Sleeper trades right now.
That's the whole difference: generic vs league-aware. The smartest take in the world is the wrong take if it's about the wrong team.
Common questions
Can't I just paste my roster into ChatGPT?
You can — and you'll do it again every single question, along with your scoring, your lineup format, your leaguemates, and whatever's changed in the NFL since the model's training cutoff. SharperSunday loads all of that automatically on every message, so the advice is league-specific without the busywork.
Why not just use ChatGPT? It's free.
Fair question — and the honest answer is the reasoning was never the hard part. ChatGPT is good at it, and so are we: SharperSunday runs on Claude. What you can't get for free is your league wired into the model — your live roster, your exact scoring, every team's win window, and real trade-based Edge values. That context is the product; the AI is the engine.
What does SharperSunday know that a generic chatbot doesn't?
Your live Sleeper roster, your league's exact scoring and lineup rules, real dynasty Edge values, the win window of every team in your league, and current NFL context. A general-purpose LLM only has that if you type it in by hand each time — and even then it can't see real trade-based values or live league data.
Do I need to give SharperSunday my Sleeper password?
No. SharperSunday uses Sleeper's public, read-only API — no password required. It can only read what's already public on your profile, and it can never make trades, drop players, or change anything in your league.
How much does SharperSunday cost?
There's a free Bench tier with 5 AI chats per week and 1 trade evaluation per day. General Manager unlocks unlimited AI chats, trade evals, and Lore reports, starting with a 14-day free trial — $12.99/mo, or $5.99/mo billed annually.
Stop re-explaining your league.
Connect your Sleeper account and get advice that already knows your roster, scoring, and win window. Free to start — 14-day trial on General Manager, $12.99/mo or $5.99/mo billed annually.
Get started free →