Amp 2026.02.19

Amp 2026.02.19 was released on .

Summary

GPT‐5.3‐Codex GPT-5.3-Codex now powers Amp's deep mode. It’s a truly impressive model. After using it, we realized: "The coding agent is dead." Everything is changing again. With GPT-5.3-Codex, the...

Release Context

  • This was the 14th Amp release of 2026 tracked by Havoptic.
  • It shipped the same day as Amp 2026.02.19.2 (February 19, 2026).

Shipped around the same time

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Release Notes

GPT‐5.3‐Codex GPT-5.3-Codex now powers Amp's deep mode. It’s a truly impressive model. After using it, we realized: "The coding agent is dead." Everything is changing again. With GPT-5.3-Codex, the agent is no longer the bottleneck. Our ability to tell it what to do is. In our experience, it's better than GPT-5.2-Codex in every dimension. It still goes deep, but it's learned when to stop. To use it: open the command palette with Ctrl-O and run the command mode: use deep in the Amp CLI, or select deep mode in the Amp editor extension's prompt field.

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