Model comparison
GPT-5.6 Terra vs GPT-6 Luna
List rate, corouter rate, context, and which ID to send for gpt-5.6-terra versus gpt-6-luna. A sample of 1 million input tokens plus 200 thousand output tokens is about $0.440 on corouter (input $0.200, output $0.240). A sample of 1 million input tokens plus 200 thousand output tokens is about $0.440 on corouter (input $0.200, output $0.240).
| GPT-5.6 Terra | GPT-6 Luna | |
|---|---|---|
| ID | gpt-5.6-terra | gpt-6-luna |
| Vendor | OpenAI | OpenAI |
| List input | $2.00 | $2.00 |
| corouter input | $0.200 | $0.200 |
| List output | $12.00 | $12.00 |
| corouter output | $1.20 | $1.20 |
| Cache read | $0.020 | $0.020 |
| Context | 1.1M | 1.1M |
Price gap
GPT-5.6 Terra and GPT-6 Luna share the same corouter input and output rates: $0.200 input and $1.20 output. The difference in this pair is the model ID, not the rate card.
Window and modalities
Both windows are 1.1M. GPT-5.6 Terra is listed with these modalities: Chat, Reasoning, Vision. GPT-6 Luna is listed with these modalities: Chat, Reasoning, Vision.
When to send gpt-5.6-terra
GPT-5.6 Terra is the lower GPT-5.6 list rate and does not carry the Code tag. Send gpt-5.6-terra for long-context chat and vision at that rate.
Both are OpenAI IDs. The field you change is model: gpt-5.6-terra or gpt-6-luna.
When to send gpt-6-luna
GPT-6 Luna keeps the 1.05M window and lists above GPT-6 Sol on output, without the Code tag. Send gpt-6-luna when you want that ID rather than gpt-6-sol or gpt-6.1-sol.
Both are OpenAI IDs. The field you change is model: gpt-6-luna or gpt-5.6-terra.
The same volume, two bills
A sample of 1 million input tokens plus 200 thousand output tokens is about $0.440 on corouter (input $0.200, output $0.240).
A sample of 1 million input tokens plus 200 thousand output tokens is about $0.440 on corouter (input $0.200, output $0.240).
Questions
- Which output rate is lower, GPT-5.6 Terra or GPT-6 Luna?
- GPT-5.6 Terra and GPT-6 Luna share the same corouter input and output rates: $0.200 input and $1.20 output. The difference in this pair is the model ID, not the rate card.
- Is corouter affiliated with the model vendors?
- No. corouter is not affiliated with OpenAI or Anthropic. Vendor names identify the model and the published list rate.
- How do you start billing?
- Create a console account and spend prepaid credits. The minimum top-up is $5. The API base is https://api.corouter.co. Put the ID you chose in the model field.