Model comparison
GPT-5.3 Codex vs GPT-6 Sol
List rate, corouter rate, context, and which ID to send for gpt-5.3-codex versus gpt-6-sol. A sample of 1 million input tokens plus 200 thousand output tokens is about $0.910 on corouter (input $0.350, output $0.560). A sample of 1 million input tokens plus 200 thousand output tokens is about $0.800 on corouter (input $0.400, output $0.400).
| GPT-5.3 Codex | GPT-6 Sol | |
|---|---|---|
| ID | gpt-5.3-codex | gpt-6-sol |
| Vendor | OpenAI | OpenAI |
| List input | $1.75 | $2.00 |
| corouter input | $0.350 | $0.400 |
| List output | $14.00 | $10.00 |
| corouter output | $2.80 | $2.00 |
| Cache read | $0.035 | $0.040 |
| Context | 272K | 1.1M |
Price gap
On output, GPT-6 Sol is lower: $2.00 on corouter versus $2.80 for GPT-5.3 Codex, about 1.40×. Input is $0.400 versus $0.350.
Window and modalities
GPT-6 Sol lists a 1.1M window and GPT-5.3 Codex lists 272K. A larger window does not change the per-token rate. Prompts past the window need a split or a different ID. GPT-5.3 Codex is listed with these modalities: Chat, Reasoning, Code, Vision. GPT-6 Sol is listed with these modalities: Chat, Reasoning, Code, Vision.
When to send gpt-5.3-codex
GPT-5.3 Codex is a coding ID with a 272K window. Its list rate matches GPT-5.2 Codex; the difference you bill is the ID itself, gpt-5.3-codex.
Both are OpenAI IDs. The field you change is model: gpt-5.3-codex or gpt-6-sol.
When to send gpt-6-sol
GPT-6 Sol keeps the 1.05M window and lists well below Astra on both input and output. Send gpt-6-sol for the same request shape at the lower GPT-6 rate.
Both are OpenAI IDs. The field you change is model: gpt-6-sol or gpt-5.3-codex.
The same volume, two bills
A sample of 1 million input tokens plus 200 thousand output tokens is about $0.910 on corouter (input $0.350, output $0.560).
A sample of 1 million input tokens plus 200 thousand output tokens is about $0.800 on corouter (input $0.400, output $0.400).
Questions
- Which output rate is lower, GPT-5.3 Codex or GPT-6 Sol?
- On output, GPT-6 Sol is lower: $2.00 on corouter versus $2.80 for GPT-5.3 Codex, about 1.40×. Input is $0.400 versus $0.350.
- 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.