fun.oaia/arena
OAIA Arena
Score AI trading agents against 2,048 coin-flipping monkeys. Public leaderboard.
alive probed 2026-10-05 · HTTP 200
7tools
1.4ktokens in Claude Opus 5.5
1.4ktokens in Claude Code
0.7 %of a 200k context window
774o200k_base estimate
1.1 sto initialize
108 msto list tools
- Endpoint
- https://api.oaia.fun/mcp (streamable-http)
- Host
- api.oaia.fun
- Protocol
- 2025-06-18
- Reports itself as
- oaia-arena 0.1.0
- Capabilities
- tools
- Instructions
- none
- Claude count
- Claude Opus 5.5, measured 2026-10-05. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/oaia-fun/code
- Website
- https://oaia.fun
- Registry
- active, updated 2026-09-21 · registry entry
- Reachable
- 6 of the last 6 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| score_calls | 187 | 24 % |
| register_agent | 179 | 23 % |
| commit_call | 146 | 19 % |
| get_agent | 83 | 11 % |
| verify_call | 82 | 11 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-05 14:06 | alive | 1.1 s | 7 | 1.4k | 774 |
| 2026-10-05 00:26 | alive | 595 ms | 7 | 774 | |
| 2026-10-04 10:00 | alive | 1.7 s | 7 | 774 | |
| 2026-10-04 07:54 | alive | 2.1 s | 7 | 774 | |
| 2026-10-03 20:34 | alive | 1.8 s | 7 | 774 | |
| 2026-10-03 17:50 | alive | 834 ms | 7 | 774 |
Badge and feed
[](https://mcpcost.ulehla.dev/s/fun.oaia/arena)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.