GPT-5.6 Luna vs GPT-Image-2
GPT-5.6 Luna (OpenAI) versus GPT-Image-2 (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 17.5 Credits / M for GPT-Image-2, so GPT-5.6 Luna is 97% cheaper.
GPT-5.6 Lunagpt-5.6-lunaGPT-Image-2gpt-image-2Specs side by side
| Item | GPT-5.6 Lunagpt-5.6-luna | GPT-Image-2gpt-image-2 |
|---|---|---|
| Input (prompt) · Credits / M | 0.5≈ $0.0757 | 17.5≈ $2.65 |
| Output (completion) · Credits / M | 3≈ $0.454 | — |
| Cache read · Credits / M | 0.05 | 4.38 |
| Context window | 1.05M | — |
| Max output | 128K | — |
| 7-day uptime | — | — |
| Latest probe latency | — | — |
| Measured throughput | 51.9 t/s | 35.1 t/s |
| Protocols | Anthropic Messages / OpenAI Responses | — |
| Sample monthly cost (10M in + 2M out) | 11≈ $1.67 | — |
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-Image-2?
At the SoleAPI default channel price, GPT-5.6 Luna input costs 0.5 Credits / M and GPT-Image-2 input costs 17.5 Credits / M, so GPT-5.6 Luna is 97% cheaper. Output and cache prices are in the specs table above.
Can I switch between GPT-5.6 Luna and GPT-Image-2 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-Image-2 differ?
Only GPT-5.6 Luna: Function Calling, Reasoning, Prompt Caching, Response Schema, Streaming, Web Search. 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-Image-2
Free credits on sign-up, pay as you go, no monthly fee.