GPT-5.4 Pro vs GPT-5.5 Pro

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

Identity & lifecycle

ProviderOpenAIOpenAI
Family / tierGPT-5 · ProGPT-5 · Pro
StatusGAGA
Released2026-03-042026-04-23
Knowledge cutoff2025-082025-12

Architecture & context

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

Pricing (per Mtok)

Input$30$30
Output$180$180
Cached input
Batch input$15$15
Free tierNoNo

Speed

Output speed (tok/s)
Time to first token (s)
Latency tierslowslow

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 score6.77.7
Decision Maker78
Domain Strategist6.57.5
Finance Lead66
Domain Practitioner77
Power User78
Skeptic6.57
Value score4.55

Benchmarks

GPQA Diamond9394
SWE-bench Verified89

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