GPT‐5.4 in Deep
3.20T1 sourceAmp News (ampcode.com)
Source record
Published by Amp News (ampcode.com) (T1 source). The original is at https://ampcode.com/news/gpt-5.4.
Pipeline notes
The summary and note below are generated by the signal pipeline — they are Beyond Desk’s reading, not quotations from the source.
SummaryAmp now runs GPT-5.4 to power its deep mode in the CLI and editor extension. The team tuned the model to reduce verbosity, matching GPT-5.3-Codex behavior, and runs it at deep^3 reasoning. Instructions for enabling deep mode via the command palette and switching reasoning depth with Opt-D are provided.
Why it mattersFirsthand note from the Amp team on tuning a frontier model for autonomous agent work, with concrete keybindings and reasoning-depth settings for users to replicate.

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