GPT-5.6 Luna vs GPT-5.6 Sol
Live Unit Economics, TTFT Latency & Reasoning Benchmark Analysis
Which model is better: GPT-5.6 Luna or GPT-5.6 Sol?
Verified Performance & Unit Economics Delta
Daily synchronized metrics from synthetic latency endpoints and benchmark evaluations.
| Metric / Dimension | GPT-5.6 Luna | GPT-5.6 Sol | Net Delta / Advantage |
|---|---|---|---|
| Input Cost / 1M Tokens | $0.18 | $8.00 | GPT-5.6 Luna is 44.4x cheaper |
| Output Cost / 1M Tokens | $0.72 | $32.00 | GPT-5.6 Luna (97.8% lower) |
| Avg TTFT Response Latency | 90ms | 420ms | GPT-5.6 Luna (+330ms faster) |
| SWE-bench Verified (Coding) | 48.5% | 79.5% | GPT-5.6 Sol (+31.0% lead) |
| Inference Value Score (IVR) | 99.9 / 100 | 35.3 / 100 | GPT-5.6 Luna (+64.6 pts) |
Interactive Monthly Token Economics & ROI Forecaster
Model your expected production workload across prompt (input) and completion (output) tokens.
Estimated Monthly Spend
$0.18/1M in · $0.72/1M out
$8/1M in · $32/1M out
When to Choose GPT-5.6 Luna
Choose GPT-5.6 Luna when you need Real-time conversational agents, high-volume classification, intent detection, and low-latency interactive apps. and have an infrastructure budget aligned with $0.18/1M tokens.
When to Choose GPT-5.6 Sol
Choose GPT-5.6 Sol when you need High-order STEM research, autonomous enterprise executive workflow coordination, and heavy deep-reasoning pipelines. and prioritize OpenAI ecosystem integration at $8.00/1M tokens.
Related Questions & Decision Factors
Which is cheaper: GPT-5.6 Luna or GPT-5.6 Sol?
GPT-5.6 Luna is cheaper at $0.18/1M input tokens compared to $8.00/1M for GPT-5.6 Sol.
Which model has lower latency: GPT-5.6 Luna or GPT-5.6 Sol?
GPT-5.6 Luna delivers faster response times with an average TTFT of 90ms vs 420ms for GPT-5.6 Sol.
When should you choose GPT-5.6 Luna?
Choose GPT-5.6 Luna when you need Real-time conversational agents, high-volume classification, intent detection, and low-latency interactive apps. and have an infrastructure budget aligned with $0.18/1M tokens.
When should you choose GPT-5.6 Sol?
Choose GPT-5.6 Sol when you need High-order STEM research, autonomous enterprise executive workflow coordination, and heavy deep-reasoning pipelines. and prioritize OpenAI ecosystem integration at $8.00/1M tokens.