LIVE

OPEN — Open-Weight Inference Share

What share of the world's AI now runs on open weights?

The share of routed LLM tokens served by open-weight models — the ones anyone can download and self-host — across OpenRouter's ~20T tokens/week. Up from 22% to ~60% in nine months.

See it live Settlement

Open-weight share

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Last settlement

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This month

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Sep 2025

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What people use today

Vendor claims and benchmark leaderboards — nothing says whose weights actually carry the traffic.

KOPS OPEN

The live open-weight share of real routed inference — a settleable index.

Valuable for

Anyone trading the open-source thesis, or the closed-lab moat.

Live index

OPEN, since September.

The share of routed LLM tokens served by open-weight models — the ones anyone can download and self-host — across OpenRouter's ~20T tokens/week. Up from 22% to ~60% in nine months.

OPEN · open-weight % of routed tokens · weeklycadence: hourly

How it's built

From where the tokens go.

Revealed, not stated

Share of actual routed tokens on downloadable-weight models — demand, not press releases.

Settles monthly

OPEN-YYYY-MM settles to the mean of the daily share (Asian-style), finalized on the 1st.

Part of the family

Sits beside CHINA, MOAT and KOST — the AI market-structure index family.

Settlement

A settleable contract.

“Will open models clear X% of inference by quarter-end?” has real conviction behind it and no instrument. OPEN is the settlement oracle. Each month settles to the arithmetic mean of the daily index (Asian-style, like the GPU-compute futures), finalized on the 1st.

Monthly settlements · OPEN-YYYY-MM

Contract spec

TickerOPEN-YYYY-MM

UnderlyingOpen-weight share

SettlementMean of daily fixings, Asian-style

SourceOpenRouter routed volume

Final1st of the following month

This month (accruing)–

Sources

OpenRouter rankings-daily (token volume)

OpenRouter /models (price)

~340 models · 17+ labs