Open weights AI market share is a one-time science and technology series on Kalshi, with markets like “Will Open vs. Closed Token Volume (open weights share) for Oct 22, 2026 be above 68.2%?”. The Kalshi Eye archive lists 161 of its markets and has 13 days of daily Parquet files from October 12, 2026 to October 24, 2026 (45 MB), with every order book change and trade.

Venue: Kalshi, series KXOPENSOURCESHARE
Category: Science and Technology, one-time
Markets: 161 (143 settled, 18 open)
Files: 13 days, October 12, 2026 to October 24, 2026, 45 MB, 3,046,557 rows
Datasets: Order book (L2, incremental), Order book snapshots (top 10, 1 second), Top of book (every change), Top of book (1-minute bars), Trades

Open Open weights AI market share in Markets to see every day and market, then export the days you need. Free sample files of each dataset are on the Kalshi data page.

Reading the files

Every KXOPENSOURCESHARE trade on October 24, 2026, in DuckDB:

SELECT ts_recv, ticker, yes_price, size, taker_side
FROM 'kalshieye-data/trades/date=2026-10-24/series=KXOPENSOURCESHARE/trades-KXOPENSOURCESHARE-2026-10-24.parquet'
ORDER BY ts_recv;

To test a strategy on this series, see How to backtest Kalshi markets.

Related Kalshi series

Open-weight AI market share (OpenRouter) (KXOPENSOURCESHAREOR): 22 markets, 3 days of files
OpenAI Market Share (KXOPENSHARE): 93 markets, 11 days of files
Google AI Market Share (KXGOOGSHARE): 86 markets, 11 days of files
Top open source intelligence AI (KXOPENINTAI): 119 markets, 13 days of files
Google Vercel requests share (KXGOOGVREQ): 169 markets, 13 days of files
Moonshot AI Vercel spend share (KXMOONVSPEND): 169 markets, 13 days of files

Figures through October 24, 2026. All Kalshi series with pages are listed on Kalshi series.