# GPT-5.4

- [Windsurf After Cognition: GPT-5.4, One Million Users, and an Identity Crisis](https://sdd.sh/2026/04/windsurf-after-cognition-gpt-5.4-one-million-users-and-an-identity-crisis.md): Windsurf has crossed one million active users, added GPT-5.4 with five reasoning effort levels, and is now fully under Cognition AI's ownership. The product is better. The question is whether it has found an identity that justifies its place in the market.