Model comparison
GPT-5.5 vs GPT-6 Luna
List rate, corouter rate, context, and which ID to send for gpt-5.5 versus gpt-6-luna. A sample of 1 million input tokens plus 200 thousand output tokens is about $1.10 on corouter (input $0.500, output $0.600). 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-5.5 | GPT-6 Luna | |
|---|---|---|
| ID | gpt-5.5 | gpt-6-luna |
| Vendor | OpenAI | OpenAI |
| List input | $5.00 | $2.00 |
| corouter input | $0.500 | $0.200 |
| List output | $30.00 | $12.00 |
| corouter output | $3.00 | $1.20 |
| Cache read | $0.050 | $0.020 |
| Context | 1.1M | 1.1M |
Price gap
On output, GPT-6 Luna is lower: $1.20 on corouter versus $3.00 for GPT-5.5, about 2.50×. Input is $0.200 versus $0.500.
Window and modalities
Both windows are 1.1M. GPT-5.5 is listed with these modalities: Chat, Reasoning, Code, Vision. GPT-6 Luna is listed with these modalities: Chat, Reasoning, Vision.
When to send gpt-5.5
GPT-5.5 keeps the GPT-5.6 Sol list rate on input and output, with a cache-read rate and no cache-write rate. Send gpt-5.5 when a workload was already qualified on that exact ID.
Both are OpenAI IDs. The field you change is model: gpt-5.5 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-5.5.
The same volume, two bills
A sample of 1 million input tokens plus 200 thousand output tokens is about $1.10 on corouter (input $0.500, output $0.600).
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-5.5 or GPT-6 Luna?
- On output, GPT-6 Luna is lower: $1.20 on corouter versus $3.00 for GPT-5.5, about 2.50×. Input is $0.200 versus $0.500.
- 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.