The French driver has signed a two-year deal with the option of 2025 too, according to Sportune.fr.
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Gasly earned an estimated €4-5m (£4-5m) this season with AlphaTauri, the Red Bull sister team, and was also contracted for next season where his salary was due to increase to €10m (£8.8m), the Sportune.fr reports says.
He will shoot up the list of the biggest F1 driver salaries next season.
Alpine were forced to pay an eight-figure fee to Red Bull to acquire Gasly, Sky reported.
Red Bull reportedly proposed Yuki Tsunoda, Gasly’s current AlphaTauri teammate, to Alpine as a decoy in the negotiation.
Red Bull were open to releasing Gasly but only if they replaced him with a quality driver – INDYCAR star Colton Herta was unattainable because he didn’t have enough superlicence points, but Nyck de Vries has now been confirmed in the F1 2023 driver line-up for AlphaTauri.
Gasly will partner Esteban Ocon at Alpine – the French duo are childhood friends who have had a tumultuous relationship.
Gasly is currently 13th in the F1 standings.