GPT-5.6 Luna vs GPT-6 Sol

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

OpenAI
GPT-5.6 LunaGA
8.7
AI Panel
OpenAI
GPT-6 SolGA
9.0
AI Panel

Identity & lifecycle

ProviderOpenAIOpenAI
Family / tierGPT-5 · nanoGPT-6 · Pro
StatusGAGA
Released2026-07-092026-09-22
Knowledge cutoff2026-022026-04

Architecture & context

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

Pricing (per Mtok)

Input$0.2$2
Output$1.2$10
Cached input$0.02$0.2
Batch input$0.1$1
Free tierYesNo

Speed

Output speed (tok/s)151—
Time to first token (s)2.63—
Latency tierfastmedium

Trust & deployment

Trains on inputsNoNo
LicenseProprietaryProprietary
CloudsAzure, Amazon BedrockAzure OpenAI, Azure AI Foundry, Bedrock
Compliance—SOC2, ISO27001, GDPR, CCPA, HIPAA

AI Panel scoring

Unified score8.79
Decision Maker98
Domain Strategist8.57.5
Finance Lead108.8
Domain Practitioner99
Power User88.2
Skeptic7.57.4
Value score9.99

Benchmarks

GPQA Diamond89.294.3
Humanity's Last Exam33.447.9
LMArena Elo14521457
LMArena Coding Elo14981520
Artificial Analysis Index3248

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