GPT-5.6 Luna vs GPT-Image-2.5 Sunburst
GPT-5.6 Luna (OpenAI) versus GPT-Image-2.5 Sunburst (OpenAI): API pricing, context window, capabilities and uptime, from the same data as each model page, at the SoleAPI default channel price. Input costs 0.46 Credits / M for GPT-5.6 Luna and 5 Credits / M for GPT-Image-2.5 Sunburst, so GPT-5.6 Luna is 91% cheaper.
Specs side by side
| Item | GPT-5.6 Lunagpt-5.6-luna | GPT-Image-2.5 Sunburstgpt-image-2.5-sunburst |
|---|---|---|
| Input (prompt) · Credits / M | 0.46≈ $0.0694 | 5≈ $0.754 |
| Output (completion) · Credits / M | 2.76≈ $0.416 | — |
| Cache read · Credits / M | 0.046 | 1.25 |
| Context window | 1.05M | — |
| Max output | 128K | — |
| 7-day uptime | — | — |
| Latest probe latency | — | — |
| Measured throughput | — | 28.8 t/s |
| Protocols | Anthropic Messages / OpenAI Responses | — |
| Sample monthly cost (10M in + 2M out) | 10.12≈ $1.53 | — |
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-2.5 Sunburst?
At the SoleAPI default channel price, GPT-5.6 Luna input costs 0.46 Credits / M and GPT-Image-2.5 Sunburst input costs 5 Credits / M, so GPT-5.6 Luna is 91% cheaper. Output and cache prices are in the specs table above.
Can I switch between GPT-5.6 Luna and GPT-Image-2.5 Sunburst 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-2.5 Sunburst differ?
Only GPT-5.6 Luna: Function Calling, Reasoning, 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-2.5 Sunburst
Free credits on sign-up, pay as you go, no monthly fee.