GPT-5 mini vs GPT-5.5 Pro vs GPT-5.5

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

OpenAI
GPT-5 miniGA
5.8
AI Panel
OpenAI
GPT-5.5 ProGA
7.7
AI Panel
OpenAI
GPT-5.5GA
8.7
AI Panel

Identity & lifecycle

ProviderOpenAIOpenAIOpenAI
Family / tierGPT-5 · miniGPT-5 · ProGPT-5 · Pro
StatusGAGAGA
Released2025-08-062026-04-232026-04-22
Knowledge cutoff2024-052025-122025-12

Architecture & context

Context window400K1.1M1.1M
Max output tokens128K128K128K
Input modalitiestext, imagetext, imagetext, image
Reasoning modeoptionalalwaysoptional
Open weightsNoNoNo

Pricing (per Mtok)

Input$0.25$30$5
Output$2$180$30
Cached input$0.025$0.5
Batch input$0.125$15$2.5
Free tierNoNoNo

Speed

Output speed (tok/s)15068.7
Time to first token (s)0.664
Latency tierfastslowslow

Trust & deployment

Trains on inputsNoNoNo
LicenseProprietaryProprietaryProprietary
CloudsAzure OpenAI, Azure AI FoundryAzure OpenAI, Azure AI FoundryAzure OpenAI, Azure AI Foundry
ComplianceSOC2, GDPR, CCPA, HIPAASOC2, GDPR, CCPA, HIPAASOC2, GDPR, CCPA, HIPAA

AI Panel scoring

Unified score5.87.78.7
Decision Maker589
Domain Strategist5.57.58.8
Finance Lead667
Domain Practitioner679.2
Power User689
Skeptic5.577.8
Value score656.5

Benchmarks

MMLU-Pro92.4
GPQA Diamond81.69493.6
SWE-bench Verified8988.7
MMMU81.2
TAU-bench98
Terminal-Bench82.7
MRCR Long Context74
Humanity's Last Exam41.4
LMArena Elo1476
Artificial Analysis Index60

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