https://fixupx.com/antirez/status/2041273781256159646

Antirez compared Claude Code Opus 4.6 and
Codex GPT 5.4 in a complex reverse-
engineering task involving a 90s Unix disk
image. GPT 5.4 made significant progress
analyzing a SCSI controller and ROM on a
486 system, while Opus achieved only minor
results. He paused the work due to token
limits and plans to continue later.
🧵 Thread • FixupX
antirez (@antirez)
During the last week I executed very long autonomous sessions of Claude Code Opus 4.6 and Codex GPT 5.4 (both at max thinking budget), in cloned directories (refreshed every time one was behind). I burned a lot of (flat rate, my OSS free account + my PRO…
 
 
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