The Prediction Markets

Which company has the best AI Agent end of October?

Closes
Nov 1, 2026, in 8 days
Traded
$1.3M
Venues
Polymarket, Kalshi
Prices updated
1 min ago
Share

What the markets expect

Anthropic 77.5%

Next is OpenAI at 13.2%. The venues differ most on Anthropic (Polymarket 90.5%, Kalshi 78%), a 13-point gap.

Anthropic 77.5%OpenAI 13.2%Google 2.1%xAI 1.9%Moonshot AI 0.9%11 others 4.4%

Odds by venue

Fair chance strips out each venue’s built-in margin (its prices add up to more than 100%), then blends the venues by how much has traded there, so the outcomes add up to 100%. Best Yes price is the cheapest ask across venues, and the payout is what a winning $100 stake returns before fees. Open a row for each venue’s contract name, bid and ask, and how closely their rules match.

Prices come from our regular polls of each venue, the oldest 1 min ago. Ages are as of when this page was built.

  • Polymarket
  • Kalshi
AnthropicArb
77.5%
Polymarket 90.5%(88.1% fair)polled, 1 min agoKalshi 78%(73.9% fair)polled, 1 min agoBest Yes 78¢ on Kalshi, $100 pays $128 (1.28x)
Polymarket
Contract
Anthropic
Last price
90.5%
Fair, margin removed
88.1%
As of
Polled 1 min ago
Buy Yes
92¢
Sell Yes
89¢
$100 on Yes pays
$109 (1.09x)
Volume
$46K
Trade this on Polymarket
Kalshi
Contract
Anthropic
Last price
78%
Fair, margin removed
73.9%
As of
Polled 1 min ago
Buy Yes
78¢
Sell Yes
73¢
$100 on Yes pays
$128 (1.28x)
Volume
$274K
Trade this on Kalshi
Same label, rules unverified

Labels suggest the same named outcome; no persisted outcome identity or settlement parity is verified.

Buying on Kalshi at 78¢ and selling on Polymarket at 89¢ nets 1100 bps before fees.

OpenAIArb
13.2%
Polymarket 4.5%polled, 1 min agoKalshi 17%(16.1% fair)polled, 1 min agoBest Yes 7¢ on Polymarket, $100 pays $1,429 (14.3x)
Polymarket
Contract
OpenAI
Last price
4.5%
As of
Polled 1 min ago
Buy Yes
7¢
Sell Yes
2¢
$100 on Yes pays
$1,429 (14.3x)
Volume
$14K
Trade this on Polymarket
Kalshi
Contract
OpenAI
Last price
17%
Fair, margin removed
16.1%
As of
Polled 1 min ago
Buy Yes
17¢
Sell Yes
15¢
$100 on Yes pays
$588 (5.88x)
Volume
$217K
Trade this on Kalshi
Same label, rules unverified

Labels suggest the same named outcome; no persisted outcome identity or settlement parity is verified.

Buying on Polymarket at 7¢ and selling on Kalshi at 15¢ nets 800 bps before fees.

Google
2.1%
Polymarket 2.8%polled, 1 min agoKalshi 2%polled, 1 min agoBest Yes 3¢ on Kalshi, $100 pays $3,333 (33.3x)
Polymarket
Contract
Google
Last price
2.8%
As of
Polled 1 min ago
Buy Yes
3.4¢
Sell Yes
2.2¢
$100 on Yes pays
$2,941 (29.4x)
Volume
$6K
Trade this on Polymarket
Kalshi
Contract
Google
Last price
2%
As of
Polled 1 min ago
Buy Yes
3¢
Sell Yes
2¢
$100 on Yes pays
$3,333 (33.3x)
Volume
$205K
Trade this on Kalshi
Same label, rules unverified

Labels suggest the same named outcome; no persisted outcome identity or settlement parity is verified.

No arbitrage: the best bid elsewhere is 2.2¢, at or below the cheapest ask of 3¢.

xAI
1.9%
Kalshi 2%polled, 1 min agoBest Yes 2¢ on Kalshi, $100 pays $5,000 (50.0x)
Kalshi
Contract
xAI
Last price
2%
As of
Polled 1 min ago
Buy Yes
2¢
Sell Yes
1¢
$100 on Yes pays
$5,000 (50.0x)
Volume
$179K
Trade this on Kalshi
Moonshot AI
0.9%
Kalshi 1%polled, 1 min agoBest Yes 1¢ on Kalshi, $100 pays $10,000 (100x)
Kalshi
Contract
Moonshot AI
Last price
1%
As of
Polled 1 min ago
Buy Yes
1¢
Sell Yes
—
$100 on Yes pays
$10,000 (100x)
Volume
$81K
Trade this on Kalshi
Alibaba
0.8%
Polymarket 0.3%polled, 1 min agoKalshi 1%polled, 1 min agoBest Yes 0.6¢ on Polymarket, $100 pays $16,667 (167x)
Polymarket
Contract
Alibaba
Last price
0.3%
As of
Polled 1 min ago
Buy Yes
0.6¢
Sell Yes
—
$100 on Yes pays
$16,667 (167x)
Volume
$2K
Trade this on Polymarket
Kalshi
Contract
Alibaba
Last price
1%
As of
Polled 1 min ago
Buy Yes
1¢
Sell Yes
—
$100 on Yes pays
$10,000 (100x)
Volume
$52K
Trade this on Kalshi
Same label, rules unverified

Labels suggest the same named outcome; no persisted outcome identity or settlement parity is verified.

Meta
0.8%
Polymarket 0.8%polled, 1 min agoBest Yes 1.3¢ on Polymarket, $100 pays $7,692 (76.9x)
Polymarket
Contract
Meta
Last price
0.8%
As of
Polled 1 min ago
Buy Yes
1.3¢
Sell Yes
0.3¢
$100 on Yes pays
$7,692 (76.9x)
Volume
$5K
Trade this on Polymarket
Baidu
0.7%
Polymarket 0.1%polled, 1 min agoKalshi 1%polled, 1 min agoBest Yes 0.1¢ on Polymarket, $100 pays $100,000 (1000x)
Polymarket
Contract
Baidu
Last price
0.1%
As of
Polled 1 min ago
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$335
Trade this on Polymarket
Kalshi
Contract
Baidu
Last price
1%
As of
Polled 1 min ago
Buy Yes
1¢
Sell Yes
—
$100 on Yes pays
$10,000 (100x)
Volume
$16K
Trade this on Kalshi
Same label, rules unverified

Labels suggest the same named outcome; no persisted outcome identity or settlement parity is verified.

DeepSeekArb
0.7%
Polymarket 0.1%polled, 1 min agoKalshi 1%polled, 1 min agoBest Yes 0.1¢ on Polymarket, $100 pays $100,000 (1000x)
Polymarket
Contract
DeepSeek
Last price
0.1%
As of
Polled 1 min ago
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$2K
Trade this on Polymarket
Kalshi
Contract
DeepSeek
Last price
1%
As of
Polled 1 min ago
Buy Yes
2¢
Sell Yes
1¢
$100 on Yes pays
$5,000 (50.0x)
Volume
$93K
Trade this on Kalshi
Same label, rules unverified

Labels suggest the same named outcome; no persisted outcome identity or settlement parity is verified.

Buying on Polymarket at 0.1¢ and selling on Kalshi at 1¢ nets 90 bps before fees.

Z.ai
0.7%
Polymarket 0.1%polled, 1 min agoKalshi 1%polled, 1 min agoBest Yes 0.1¢ on Polymarket, $100 pays $100,000 (1000x)
Polymarket
Contract
Z.ai
Last price
0.1%
As of
Polled 1 min ago
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$372
Trade this on Polymarket
Kalshi
Contract
Z.ai
Last price
1%
As of
Polled 1 min ago
Buy Yes
1¢
Sell Yes
—
$100 on Yes pays
$10,000 (100x)
Volume
$69K
Trade this on Kalshi
Same label, rules unverified

Labels suggest the same named outcome; no persisted outcome identity or settlement parity is verified.

Show 10 more outcomes
Moonshot
0.2%
Polymarket 0.3%polled, 1 min agoBest Yes 0.4¢ on Polymarket, $100 pays $25,000 (250x)
Polymarket
Contract
Moonshot
Last price
0.3%
As of
Polled 1 min ago
Buy Yes
0.4¢
Sell Yes
0.1¢
$100 on Yes pays
$25,000 (250x)
Volume
$2K
Trade this on Polymarket
Amazon
0.1%
Polymarket 0.1%polled, 1 min agoBest Yes 0.1¢ on Polymarket, $100 pays $100,000 (1000x)
Polymarket
Contract
Amazon
Last price
0.1%
As of
Polled 1 min ago
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$660
Trade this on Polymarket
ByteDance
0.1%
Polymarket 0.1%polled, 1 min agoBest Yes 0.1¢ on Polymarket, $100 pays $100,000 (1000x)
Polymarket
Contract
ByteDance
Last price
0.1%
As of
Polled 1 min ago
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$822
Trade this on Polymarket
Meituan
0.1%
Polymarket 0.1%polled, 1 min agoBest Yes 0.1¢ on Polymarket, $100 pays $100,000 (1000x)
Polymarket
Contract
Meituan
Last price
0.1%
As of
Polled 1 min ago
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$675
Trade this on Polymarket
Microsoft
0.1%
Polymarket 0.1%polled, 1 min agoBest Yes 0.1¢ on Polymarket, $100 pays $100,000 (1000x)
Polymarket
Contract
Microsoft
Last price
0.1%
As of
Polled 1 min ago
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$509
Trade this on Polymarket
MiniMax
0.1%
Polymarket 0.1%polled, 1 min agoBest Yes 0.1¢ on Polymarket, $100 pays $100,000 (1000x)
Polymarket
Contract
MiniMax
Last price
0.1%
As of
Polled 1 min ago
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$1K
Trade this on Polymarket
Mistral
0%
Polymarket 0.1%polled, 1 min agoBest Yes 0.1¢ on Polymarket, $100 pays $100,000 (1000x)
Polymarket
Contract
Mistral
Last price
0.1%
As of
Polled 1 min ago
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$2K
Trade this on Polymarket
Nvidia
0%
Polymarket 0.1%polled, 1 min agoBest Yes 0.1¢ on Polymarket, $100 pays $100,000 (1000x)
Polymarket
Contract
Nvidia
Last price
0.1%
As of
Polled 1 min ago
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$464
Trade this on Polymarket
SpaceXAI
0%
Polymarket 0.1%polled, 1 min agoBest Yes 0.1¢ on Polymarket, $100 pays $100,000 (1000x)
Polymarket
Contract
SpaceXAI
Last price
0.1%
As of
Polled 1 min ago
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$3K
Trade this on Polymarket
Xiaomi
0%
Polymarket 0.1%polled, 1 min agoBest Yes 0.1¢ on Polymarket, $100 pays $100,000 (1000x)
Polymarket
Contract
Xiaomi
Last price
0.1%
As of
Polled 1 min ago
Buy Yes
0.1¢
Sell Yes
—
$100 on Yes pays
$100,000 (1000x)
Volume
$511
Trade this on Polymarket

Possible arbitrage before fees: buy Anthropic on Kalshi at 78¢, sell on Polymarket at 89¢ (1100 bps). Check the rules below before trading. See all live spreads

Mostly the same bet: one difference

Where they differ

  • Trading closes at different times: Nov 1, 2026, 3:59 AM UTC on Polymarket and Dec 31, 2026, 3:00 PM UTC on Kalshi.
Polymarket
Polymarket resolves via:
UMA optimistic oracle, source: arena.ai
Kalshi
Kalshi resolves via:
Kalshi (CFTC-regulated exchange), source: LiveBench.ai
Show full rule comparison
  • Trading closes Nov 1, 2026, 3:59 AM UTC on Polymarket and Dec 31, 2026, 3:00 PM UTC on Kalshi.

Summarized from each venue’s published rules; the venue’s own rules page is the final word.

How the odds have moved

The top 3 outcomes on both venues, with the consensus between them. Hover for exact values.

  • Anthropic
  • OpenAI
  • Google

Live prices for Anthropic

What it costs to buy Yes, what you would get selling it, and the last trade on each exchange, updating as orders change. Hover a status for timing details.

Order books

Each venue’s resting orders for the selected outcome’s Yes contract, side by side. Top of book streams live; depth refreshes every 15 seconds.

Combined depth · both venues

Loading both order books…

Polymarket

Open on Polymarket ↗

Top of book

Connecting
Best bid
—
Spread
—
Best ask
—

Waiting for the first live quote…

Depth · top 8 levels

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Recent trades

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Kalshi

Open on Kalshi ↗

Top of book

Connecting
Best bid
—
Spread
—
Best ask
—

Waiting for the first live quote…

Depth · top 8 levels

Loading snapshot…

Recent trades

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What your stake buys

Enter a stake to see where it buys the most after fees, using each venue’s live order book.

$
Buy

Loading both order books…

Buys at the asks resting now (taker orders), cheapest after fees first, from order-book snapshots up to 15 seconds old. Fees: Kalshi 0.07 × price × (1 − price) per share, rounded up to the cent; Polymarket 0.05 × price × (1 − price) per share (other / general rate). Fee calculator. Estimates only, not advice.

About this market

Live prediction market odds for "Which company has the best AI Agent end of October?". Anthropic leads at 77.5%. Next is OpenAI at 13.2%. $1.3M has traded across 20 outcomes on Kalshi and Polymarket. The market is expected to resolve by Nov 1, 2026.

This market will resolve according to the company that owns the model that has the highest rank based on the Agent Arena Leaderboard (https://arena.ai/leaderboard/agent) when the table under "Agent Arena" filtered for "Models" is checked on October 31, 2026, 12:00 PM ET. Results from the "Rank" column under the "Agent Arena" Leaderboard tab at https://arena.ai/leaderboard/agent filtered for "Models" will be used to resolve this market. Note: Models marked “AutoEval” at the applicable check time will not be considered, regardless of whether they display a rank or score. Models will be ordered primarily by their leaderboard rank at the market’s check time. If two or more models are tied on rank, they will be ordered by which model is listed higher on the leaderboard. If a tie still remains, alphabetical order of company names as listed in this market group will be used as a final tiebreaker (e.g., “Google” would be ranked ahead of “SpaceXAI”). This market will resolve based on the company that occupies first place under this ranking. The resolution source for this market is the Agent Arena Leaderboard found at https://arena.ai/leaderboard/agent. If this resolution source is unavailable at check time, this market will remain open until the leaderboard comes back online and will resolve based on the first check after it becomes available. If it becomes permanently unavailable, this market will resolve based on another resolution source.

Questions

What does the consensus price mean?

It is the price of a Yes contract that pays $1 if the outcome happens. A 14¢ price means traders put the chance near 14%. Where two venues list the same outcome, we blend their last prices, weighting the venue with more trading volume more heavily (neither counts for less than a quarter). When only one outcome can win, each venue’s prices add up to a little over 100% (its margin); the fair chance removes that margin so the outcomes add up to exactly 100%.

How is the payout worked out?

A Yes contract pays $1 if it wins, so at the best ask a $100 stake buys 100 ÷ ask contracts. At 18¢ that is about 555 contracts, paying $556 (5.56x) if Yes happens. Venue fees and price slippage on larger orders are not included.

Why do the venues show different prices?

Each venue has its own traders, fees and order book. Contracts can also settle on slightly different terms, which is why each row lists how closely the rules match.

Is a price gap an arbitrage?

Only when you can buy Yes on one venue below what someone pays for Yes on the other, after fees, and both contracts settle the same way. We show the executable bid and ask so you can check.

How fresh are these prices?

Venue prices refresh every few minutes, and the order book and live quotes stream continuously. Each venue’s card shows when we last observed it.

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