# Amp — GPT‐5.3‐Codex

- Company: Amp (ampcode.com)
- Announced: 2026-02-19
- Category: model-update
- Coverage: not counted
- Announcement: yes
- Group: models
- Source: https://ampcode.com/news/gpt-5.3-codex
- Record: https://forck.live/items/7755-gpt-5-3-codex
- Subject: Amp
- Models affected: GPT-5.3-Codex, GPT-5.2-Codex

Amp announced that GPT-5.3-Codex now powers its deep mode, claiming it is better than GPT-5.2-Codex in every dimension.

## Evidence

Verbatim from https://ampcode.com/news/gpt-5.3-codex:

> GPT-5.3-Codex now powers Amp's deep mode.

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Record: https://forck.live/items/7755-gpt-5-3-codex
Catalogue: https://forck.live/llms.txt
Current issue: https://forck.live/feed.md