From the source

GPT-5.4, The New Oracle

Model update

Amp introduced GPT-5.4 as an oracle in its smart mode, complementing Opus 4.6, and also added it to deep mode alongside GPT-5.3-Codex.

Internal evaluations show improvement in response quality and reduced latency compared to GPT-5.2.

From the source
We have a new oracle in Amp and it's GPT-5.4.
ampcode.com

Other stories

Self-Hosted Orbs
Amp lets teams run orbs on their own compute
Amp· 22 OctCapability change
Assign It To Amp
Amp agent sessions now start from Linear issues
Amp· 19 OctCapability change
See Your Runner's Desktop
Amp adds direct desktop viewing and control for macOS and Linux runners.
Amp· 16 OctCapability change
Take Puck with You
Amp adds MCP tools for ChatGPT and Claude