'26
Which company has the best Code Arena WebDev AI model end of September?
resolves Oct 1, 2026 · source: https://arena.ai/leaderboard/code/webdev
24H VOLUME
$0
TRADERS
0
PAPER MODE · LIVE
IMPLIED PROBABILITY · 90 DAYS
Anthropic 8%
Moonshot 8%
OpenAI 8%
Z.ai 8%
Google 8%
Alibaba 8%
Meta 8%
DeepSeek 8%
SpaceXAI 8%
Mistral 8%
Xiaomi 8%
Poolside 8%
Someone else 8%
OUTCOME
CHANCE
BUY
AN
Anthropic
+0.0pt today
0
1
2
3
4
5
6
7
8
9
%
YES 7.69¢
NO 92.31¢
MO
Moonshot
+0.0pt today
0
1
2
3
4
5
6
7
8
9
%
YES 7.69¢
NO 92.31¢
OP
OpenAI
+0.0pt today
0
1
2
3
4
5
6
7
8
9
%
YES 7.69¢
NO 92.31¢
ZA
Z.ai
+0.0pt today
0
1
2
3
4
5
6
7
8
9
%
YES 7.69¢
NO 92.31¢
GO
Google
+0.0pt today
0
1
2
3
4
5
6
7
8
9
%
YES 7.69¢
NO 92.31¢
AL
Alibaba
+0.0pt today
0
1
2
3
4
5
6
7
8
9
%
YES 7.69¢
NO 92.31¢
ME
Meta
+0.0pt today
0
1
2
3
4
5
6
7
8
9
%
YES 7.69¢
NO 92.31¢
DE
DeepSeek
+0.0pt today
0
1
2
3
4
5
6
7
8
9
%
YES 7.69¢
NO 92.31¢
SP
SpaceXAI
+0.0pt today
0
1
2
3
4
5
6
7
8
9
%
YES 7.69¢
NO 92.31¢
MI
Mistral
+0.0pt today
0
1
2
3
4
5
6
7
8
9
%
YES 7.69¢
NO 92.31¢
XI
Xiaomi
+0.0pt today
0
1
2
3
4
5
6
7
8
9
%
YES 7.69¢
NO 92.31¢
PO
Poolside
+0.0pt today
0
1
2
3
4
5
6
7
8
9
%
YES 7.69¢
NO 92.31¢
SE
Someone else
+0.0pt today
0
1
2
3
4
5
6
7
8
9
%
YES 7.69¢
NO 92.31¢
prices in ¢ = implied probability · a winning share redeems for $1
paper book · chances always sum to 100%
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ORDER TICKET · PAPER
fee 5% at settlement
AN
Anthropic
chance
8%
· pick an outcome on the left
YES · 7.69¢
NO · 92.31¢
STAKE
$25
$100
$250
$500
shares @ 7.69¢
1300.4
if Anthropic wins
+$1135 profit
estimate — the server prices the fill, including your own impact
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Paper balance only — nothing at risk. A winning share redeems for $1 at settlement; sell any time before.
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AN
Anthropic
YES 7.69¢ · NO 92.31¢ · chance 8%
TICKET
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