GPT-5.4 vs GPT-5.5

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

OpenAI
GPT-5.4GA
8.7
AI Panel
OpenAI
GPT-5.5GA
8.7
AI Panel

Identity & lifecycle

ProviderOpenAIOpenAI
Family / tierGPT-5 · MediumGPT-5 · Pro
StatusGAGA
Released2026-03-042026-04-22
Knowledge cutoff2025-082025-12

Architecture & context

Context window1.1M1.1M
Max output tokens128K128K
Input modalitiestext, imagetext, image
Reasoning modeoptionaloptional
Open weightsNoNo

Pricing (per Mtok)

Input$2.5$5
Output$15$30
Cached input$0.25$0.5
Batch input$1.25$2.5
Free tierNoNo

Speed

Output speed (tok/s)86.368.7
Time to first token (s)1.264
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 score8.78.7
Decision Maker99
Domain Strategist8.78.8
Finance Lead97
Domain Practitioner99.2
Power User8.59
Skeptic87.8
Value score8.56.5

Benchmarks

MMLU-Pro92.4
GPQA Diamond92.893.6
SWE-bench Verified88.7
MMMU81.281.2
TAU-bench98
Terminal-Bench75.182.7
MRCR Long Context36.674
Humanity's Last Exam39.841.4
LMArena Elo14841476
Artificial Analysis Index5760

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