Cosmic rune price in OSRS — live Grand Exchange data

About Cosmic rune

In game it is examined as “Used for enchant spells.” Cosmic rune is available to free-to-play accounts. The base game value is 50 gp, which is what shops price from rather than what players pay.

Cosmic rune buy limit

The Grand Exchange lets one account buy 18,000 every 4 hours. That is a generous limit, so the market rather than the limit is usually what caps a position here. Filling it once costs about 2,394,000 gp at the 133 gp price recorded on 11 October 2026. The limit is per account and resets on a rolling 4-hour timer.

GE tax on Cosmic rune

Selling at 133 gp costs 2 gp in tax — 2%, rounded down, taken from the seller. A flip has to clear that before it makes anything, and it is the number most margin calculators leave out.

High alching Cosmic rune

High alchemy turns one Cosmic rune into 30 gp. That is less than the 142 gp nature rune the cast costs, so alching Cosmic rune always loses money.

How much Cosmic rune trades

Cosmic rune sees about 2.45M trades a day, which makes it one of the busiest items on the Grand Exchange — orders at a fair price fill in minutes. That is roughly 136 times the 18,000 buy limit.

Cosmic rune FAQ

How much is Cosmic rune in OSRS? Cosmic rune is 133 gp on the Grand Exchange as of 11 October 2026, with an insta-sell of 131 gp. The chart above is live.

What is the buy limit for Cosmic rune? 18,000 every 4 hours.

Can you high alch Cosmic rune for profit? No — the alch value is 30 gp and the nature rune alone costs 142 gp.

Do you need members for Cosmic rune? No, free-to-play accounts can buy and sell it.