GPT-5 vs GPT-5.5

Best cell per row highlighted. Null means undisclosed — never counted as zero.

OpenAI
GPT-5GA
6.5
AI Panel
OpenAI
GPT-5.5GA
8.7
AI Panel

Identity & lifecycle

ProviderOpenAIOpenAI
Family / tierGPT-5 · ProGPT-5 · Pro
StatusGAGA
Released2025-08-062026-04-22
Knowledge cutoff2024-092025-12

Architecture & context

Context window400K1.1M
Max output tokens128K128K
Input modalitiestext, imagetext, image
Reasoning modeoptionaloptional
Open weightsNoNo

Pricing (per Mtok)

Input$1.25$5
Output$10$30
Cached input$0.125$0.5
Batch input$0.625$2.5
Free tierNoNo

Speed

Output speed (tok/s)9068.7
Time to first token (s)164
Latency tiermediumslow

Trust & deployment

Trains on inputsNoNo
LicenseProprietaryProprietary
CloudsAzure OpenAI, Azure AI FoundryAzure OpenAI, Azure AI Foundry
ComplianceSOC2, GDPR, CCPA, HIPAASOC2, GDPR, CCPA, HIPAA

AI Panel scoring

Unified score6.58.7
Decision Maker69
Domain Strategist6.58.8
Finance Lead67
Domain Practitioner79.2
Power User79
Skeptic6.57.8
Value score76.5

Benchmarks

MMLU-Pro92.4
GPQA Diamond89.493.6
AIME 202594.6
SWE-bench Verified74.988.7
Aider Polyglot88
MMMU84.281.2
TAU-bench98
Terminal-Bench82.7
MRCR Long Context74
Humanity's Last Exam4241.4
LMArena Elo1476
Artificial Analysis Index60

Scores link to their sources. Missing cells mean the vendor hasn't disclosed a result — honesty over padding.