GPT-5.6 Luna vs GPT-6.1 Terra
GPT-5.6 Luna (OpenAI) versus GPT-6.1 Terra (OpenAI): API pricing, context window, capabilities and uptime, from the same data as each model page, at the SoleAPI default channel price. Input costs 0.5 Credits / M for GPT-5.6 Luna and 3 Credits / M for GPT-6.1 Terra, so GPT-5.6 Luna is 83% cheaper. Context windows are 1.05M and 1.05M.
GPT-5.6 Lunagpt-5.6-lunaGPT-6.1 Terragpt-6.1-terraSpecs side by side
| Item | GPT-5.6 Lunagpt-5.6-luna | GPT-6.1 Terragpt-6.1-terra |
|---|---|---|
| Input (prompt) · Credits / M | 0.5≈ $0.0759 | 3≈ $0.455 |
| Output (completion) · Credits / M | 3≈ $0.455 | 15≈ $2.28 |
| Cache read · Credits / M | 0.05 | 0.15 |
| Context window | 1.05M | 1.05M |
| Max output | 128K | 128K |
| 7-day uptime | — | — |
| Latest probe latency | — | — |
| Measured throughput | 21.8 t/s | — |
| Protocols | Anthropic Messages / OpenAI Responses | Anthropic Messages / OpenAI Responses |
| Sample monthly cost (10M in + 2M out) | 11≈ $1.67 | 60≈ $9.11 |
Prices are the SoleAPI default channel price in Credits (1 Credit = ¥1); green marks the better side. Uptime and latency come from SoleAPI probes; a dash means the model is not probed yet.
Capabilities
FAQ
Which is cheaper, GPT-5.6 Luna or GPT-6.1 Terra?
At the SoleAPI default channel price, GPT-5.6 Luna input costs 0.5 Credits / M and GPT-6.1 Terra input costs 3 Credits / M, so GPT-5.6 Luna is 83% cheaper. Output and cache prices are in the specs table above.
Which has the larger context window, GPT-5.6 Luna or GPT-6.1 Terra?
GPT-5.6 Luna offers 1.05M tokens, GPT-6.1 Terra offers 1.05M tokens.
Can I switch between GPT-5.6 Luna and GPT-6.1 Terra at any time?
Yes. SoleAPI calls every model with the same API key; switching is just changing the model field in the request, and billing is split per model in one console.
How do the capabilities of GPT-5.6 Luna and GPT-6.1 Terra differ?
Only GPT-6.1 Terra: File Input. Every other capability is either supported by both or by neither; see the capability table above.
More comparisons
One API key for both GPT-5.6 Luna and GPT-6.1 Terra
Free credits on sign-up, pay as you go, no monthly fee.