According to this GI report, Chart-Track figures show that GTA IV has sold more than 926,000 copies sold in its first five days on sale in the UK.
The British organisation reports that 514,000 copies were sold for 360 and 413,000 copies were sold for PS3 - a split of 55 per cent to 45 per cent.
By comparison, San Andreas, which launched in October 2004, sold 501,000 copies on its first day and 677,000 units during its first week - which consisted only of two days. At the time it was released, the PS2 had an installed base of 6.6 million.
San Andreas still holds the day one and week one record for the individual format, but GTA IV is the new record holder for all formats.