GPT-5.6 Terra vs GPT-Image-2
GPT-5.6 Terra (OpenAI) versus GPT-Image-2 (OpenAI): API pricing, context window, capabilities and uptime, from the same data as each model page, at the WandAPI default channel price. Input costs 0.6 Credits / M for GPT-5.6 Terra and 1.5 Credits / M for GPT-Image-2, so GPT-5.6 Terra is 60% cheaper.
GPT-5.6 Terragpt-5.6-terraGPT-Image-2gpt-image-2Specs side by side
| Item | GPT-5.6 Terragpt-5.6-terra | GPT-Image-2gpt-image-2 |
|---|---|---|
| Input (prompt) · Credits / M | 0.6≈ $0.0912 | 1.5≈ $0.228 |
| Output (completion) · Credits / M | 3.6≈ $0.547 | 9≈ $1.37 |
| Cache read · Credits / M | 0.06 | 0.375 |
| Context window | 1.05M | — |
| Max output | 128K | — |
| 7-day uptime | — | — |
| Latest probe latency | — | — |
| Measured throughput | 50.2 t/s | 37.4 t/s |
| Protocols | OpenAI Responses | — |
| Sample monthly cost (10M in + 2M out) | 13.2≈ $2.01 | 33≈ $5.02 |
Prices are the WandAPI default channel price in Credits (1 Credit = ¥1); green marks the better side. Uptime and latency come from WandAPI probes; a dash means the model is not probed yet.
Capabilities
FAQ
Which is cheaper, GPT-5.6 Terra or GPT-Image-2?
At the WandAPI default channel price, GPT-5.6 Terra input costs 0.6 Credits / M and GPT-Image-2 input costs 1.5 Credits / M, so GPT-5.6 Terra is 60% cheaper. Output and cache prices are in the specs table above.
Can I switch between GPT-5.6 Terra and GPT-Image-2 at any time?
Yes. WandAPI 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 Terra and GPT-Image-2 differ?
Only GPT-5.6 Terra: Function Calling, Reasoning, Response Schema, Streaming. 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 Terra and GPT-Image-2
Free credits on sign-up, pay as you go, no monthly fee.