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AI Atlas
Familyroot · GPT

GPT 5.5

All 5 models in the terminal →

first seen 11 Sept 2026

family_01M2A55TREPSFDE8C1S70QC6HQ

Models
5
First release
24 Apr 2026
Latest release
24 Apr 2026
Parameters
—
Artifacts
0
Providers
1

Releases

Family releases by statusActiveDeprecatedOct 25Nov 25Dec 25Jan 26Feb 26Mar 26Apr 26May 26Jun 26Jul 26Aug 26Sept 26gpt-5.5 — 24 Apr 2026gpt-5.5-pro — 24 Apr 2026

2 dated releases · dot size = best benchmark rank of the member · 3 members without a sourced release date not shown

Members 5

Family members
ModelParamsContextOpennessLicenceReleasedStatusBest rankCompare
gpt-5.5OpenAI—1.05MClosed—24 Apr 2026Deprecated#2 LiveBench Data Analysi
gpt-5.5-proOpenAI—1.05MClosed—24 Apr 2026Active—
gpt-5-5-instant-05-26OpenAI—400KClosed——Deprecated#30 Terminal-Bench
gpt-5-5-instant-06-26OpenAI—400KClosed——Active#25 SciCode
gpt-5.5-cyberOpenAI—————Active—

Lineage among members 0 relations

Open in Graph →

No lineage relation recorded among these members.

Benchmark progress

Benchmark progress needs at least two dated members with a rank on the same benchmark. Ranks (not scores) are what the family endpoint provides.

Aggregates are computed from the members' sourced claims; members without a release date or parameter count are left out of the range and timeline rather than guessed. Methodology →