GPT-5.4 Pro vs GPT-5.5 Pro vs GPT-5.5

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

OpenAI
GPT-5.4 ProGA
6.7
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 · ProGPT-5 · ProGPT-5 · Pro
StatusGAGAGA
Released2026-03-042026-04-232026-04-22
Knowledge cutoff2025-082025-122025-12

Architecture & context

Context window1.1M1.1M1.1M
Max output tokens128K128K128K
Input modalitiestext, imagetext, imagetext, image
Reasoning modealwaysalwaysoptional
Open weightsNoNoNo

Pricing (per Mtok)

Input$30$30$5
Output$180$180$30
Cached input$0.5
Batch input$15$15$2.5
Free tierNoNoNo

Speed

Output speed (tok/s)68.7
Time to first token (s)64
Latency tierslowslowslow

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 score6.77.78.7
Decision Maker789
Domain Strategist6.57.58.8
Finance Lead667
Domain Practitioner779.2
Power User789
Skeptic6.577.8
Value score4.556.5

Benchmarks

MMLU-Pro92.4
GPQA Diamond939493.6
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.