Sony is apparently "confident" that its next home console will release ahead of Microsoft before Christmas 2013, according to VG247.
The firm has already begun contacting publishers about the system, with the likes of Ubisoft already "working on it".
Others will be briefed on the system in May and June of this year, shortly before this year's E3 expo, while "most developers" will be informed by the year's end.
Sony has already stated that releasing after the competition would be an "undesirable move".
The latest PS4 rumour said that the system is codenamed Orbis and will release next year.
The report echoes rumours that AMD is working on a brand new "hush-hush" chip to power the PlayStation 4.
Despite speculation that it will unveil its new console at this year's E3 event in Los Angeles, Sony has distanced itself from announcing the PS4 in 2012.
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