GPT-5.6 Sol vs GPT-6 Luna
GPT-5.6 Sol (OpenAI) versus GPT-6 Luna (OpenAI): API pricing, context window, capabilities and uptime, from the same data as each model page, at the SoleAPI default channel price. Input costs 1.5 Credits / M for GPT-5.6 Sol and 0.25 Credits / M for GPT-6 Luna, so GPT-6 Luna is 83% cheaper. Context windows are 1.05M and 1.05M.
GPT-5.6 Solgpt-5.6-solGPT-6 Lunagpt-6-lunaSpecs side by side
| Item | GPT-5.6 Solgpt-5.6-sol | GPT-6 Lunagpt-6-luna |
|---|---|---|
| Input (prompt) · Credits / M | 1.5≈ $0.227 | 0.25≈ $0.0379 |
| Output (completion) · Credits / M | 9≈ $1.36 | 1.25≈ $0.189 |
| Cache read · Credits / M | 0.15 | 0.025 |
| Context window | 1.05M | 1.05M |
| Max output | 128K | 128K |
| 7-day uptime | — | 100.0% |
| Latest probe latency | — | 3.0s |
| Measured throughput | 66.8 t/s | 16.5 t/s |
| Protocols | Anthropic Messages / OpenAI Responses | Anthropic Messages / OpenAI Responses |
| Sample monthly cost (10M in + 2M out) | 33≈ $5.00 | 5≈ $0.757 |
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 Sol or GPT-6 Luna?
At the SoleAPI default channel price, GPT-5.6 Sol input costs 1.5 Credits / M and GPT-6 Luna input costs 0.25 Credits / M, so GPT-6 Luna is 83% cheaper. Output and cache prices are in the specs table above.
Which has the larger context window, GPT-5.6 Sol or GPT-6 Luna?
GPT-5.6 Sol offers 1.05M tokens, GPT-6 Luna offers 1.05M tokens.
Can I switch between GPT-5.6 Sol and GPT-6 Luna 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 Sol and GPT-6 Luna differ?
Only GPT-6 Luna: 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 Sol and GPT-6 Luna
Free credits on sign-up, pay as you go, no monthly fee.