OpenGPTEvidence-based model decisionsCURATED MODEL COMPARISON
GPT-5.6 Terra vs GPT-5.6 Luna
GPT-5.6 Terra vs GPT-5.6 Luna: Choose the exact version within one model family, keeping capability, speed, access, and lifecycle differences explicit. Compare exact official model IDs using published signals, provider links, and clearly separated family-level guidance.
Updated:Published data side by side
Each value keeps its original source and scale. Missing data is not treated as zero, and OpenGPT does not create a composite winner.
| Ranking angle | GPT-5.6 Terra | GPT-5.6 Luna |
|---|---|---|
| User preference | No linked comparable data | No linked comparable data |
| Intelligence index | No linked comparable data | No linked comparable data |
| Objective tasks | Rank 9Published value: 77.9Original ranking: LiveBench ↗Official identity mapping ↗Research edition: 2026-08 · Aug 8, 2026 | No linked comparable data |
| Cost per successful task | No linked comparable data | No linked comparable data |
| Open-weight models | No linked comparable data | No linked comparable data |
This page organizes published third-party data. OpenGPT did not rerun the underlying evaluations.
What to validate
These strengths and limits describe the wider model family from official positioning, not measured results for this exact version.
GPT-5.6 Terra
gpt-5.6-terraFamily strengths
Covers general, coding, vision, and tool-based workflows. Straightforward managed API with extensive developer tooling.
Family limitations
Closed weights and provider-controlled deployment. Cost, latency, and limits vary by exact model and service tier.
GPT-5.6 Luna
gpt-5.6-lunaFamily strengths
Covers general, coding, vision, and tool-based workflows. Straightforward managed API with extensive developer tooling.
Family limitations
Closed weights and provider-controlled deployment. Cost, latency, and limits vary by exact model and service tier.
Continue with your decision
Use the interactive matrix to add more models, then validate the final two on your own prompts and constraints.