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GPT-5.5 Instant (2026-06-25 hosted snapshot)

OpenAI · 2026-06-25

GPT-5.5 Instant hosted snapshot dated June 25, 2026 by Artificial Analysis. It is represented as a benchmark entry because the evaluator does not identify an immutable released API artifact for this snapshot.

Benchmark scores

BenchmarkScore
AA-Briefcase Elo1082
AA-Briefcase v1.1 Elo1086
AA-LCR64.0
AA-LCR v1.170.0
AA-Omniscience Index3.7
Artificial Analysis Agentic Index11.0
Artificial Analysis Coding Index39.4
Artificial Analysis Intelligence Index28.9
Artificial Analysis Intelligence Index v4.326.8
Artificial Analysis Intelligence Index v4.3.226.0
Artificial Analysis Omniscience Accuracy44.4
Artificial Analysis Omniscience Hallucination Rate73.3
Artificial Analysis Progress Index v1282
AutomationBench-AA1.4
AutomationBench-AA 1.0.636.4
CritPt (avg@5)0.0
GDP.pdf (Artificial Analysis, All-pass)20.2
GDP.pdf (Artificial Analysis, Mean Criteria)70.5
GDPval-AA v2662
GDPval-AA v2 (normalized)11.1
GDPval-AA v2.1517
GPQA Diamond (Artificial Analysis avg@5)82.3
Humanity's Last Exam (Text-Only)19.9
Humanity's Last Exam Diamond14.6
Medical Long Context Reasoning (MLCR-AA, October 2026 methodology)31.7
MLCR-AA Accuracy (October 2026 methodology)81.1
MLCR-AA Completeness (October 2026 methodology)35.6
SciCode (Artificial Analysis avg@3)48.6
SciCode 1.0.1 (Artificial Analysis)52.5
Terminal-Bench 2.134.8
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