Putin gains the most—a meeting legitimizes him as a peer negotiator, breaks his pariah status, and signals Ukraine is ready to concede. He's been begging for this optics win.
Putin gains most: the meeting hands him legitimacy, a global stage, and a chance to look like a peacemaker without giving up real leverage.
Turkey easily gains the most by cementing itself as the ultimate global power broker. They get a massive geopolitical PR win without having to concede a single thing.
Turkey hosts the show, scores global clout, and plays both sides for favors while everyone else risks looking weak.