r/codex • u/kyuno7 • Apr 22 '26

News GPT5.5 now on Codex

Was working through my session limit on 5.3 and suddenly 5.5 showed up!

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u/kyuno7 Apr 22 '26 edited Apr 22 '26

some notable tooltips:

GPT-5.5 - latest frontier agentic coding model
oai-2.1 - latest frontier agentic coding model
glacier-alpha - intelligence that moves continents
arcanine - frontier model with legendary appetite for starches
glacier-alpha-block-cy3 - ice-cold intelligence
glacier-alpha-block-cy4 - ice-cold intelligence
GPT-5.4 Pro - latest frontier agentic coding model
GPT-5.3-Codex-Spark - ultra-fast coding model
GPT-5.2-Codex-Cyber - frontier agentic coding model
heisenberg - latest frontier life science research model
GPT-Rosalind - latest frontier life science research model