Model comparison
Claude Opus 5.5 vs GPT-5.5
List rate, corouter rate, context, and which ID to send for claude-opus-5-5 versus gpt-5.5. A sample of 1 million input tokens plus 200 thousand output tokens is about $1.60 on corouter (input $0.800, output $0.800). A sample of 1 million input tokens plus 200 thousand output tokens is about $2.20 on corouter (input $1.00, output $1.20).
| Claude Opus 5.5 | GPT-5.5 | |
|---|---|---|
| ID | claude-opus-5-5 | gpt-5.5 |
| Vendor | Anthropic | OpenAI |
| List input | $4.00 | $5.00 |
| corouter input | $0.800 | $1.00 |
| List output | $20.00 | $30.00 |
| corouter output | $4.00 | $6.00 |
| Cache read | $0.040 | $0.100 |
| Context | 1M | 1.1M |
Price gap
On output, Claude Opus 5.5 is lower: $4.00 on corouter versus $6.00 for GPT-5.5, about 1.50×. Input is $0.800 versus $1.00.
Window and modalities
GPT-5.5 lists a 1.1M window and Claude Opus 5.5 lists 1M. A larger window does not change the per-token rate. Prompts past the window need a split or a different ID. Claude Opus 5.5 is listed with these modalities: Chat, Vision, Reasoning, Code. GPT-5.5 is listed with these modalities: Chat, Reasoning, Code, Vision.
When to send claude-opus-5-5
Claude Opus 5.5 is the lower Opus list rate in this catalog, with a cheaper cache read than Opus 5 and a Code tag. Send claude-opus-5-5 when you want that ID specifically.
This ID uses the familiar messages JSON shape. The other side is gpt-5.5 from OpenAI. corouter is not affiliated with OpenAI or Anthropic.
When to send gpt-5.5
GPT-5.5 keeps the high GPT-5.6 Sol list rate and the Code tag. Send gpt-5.5 when a workload was already qualified on that exact ID.
This ID uses the familiar chat-completions JSON shape. The other side is claude-opus-5-5 from Anthropic. corouter is not affiliated with OpenAI or Anthropic.
The same volume, two bills
A sample of 1 million input tokens plus 200 thousand output tokens is about $1.60 on corouter (input $0.800, output $0.800).
A sample of 1 million input tokens plus 200 thousand output tokens is about $2.20 on corouter (input $1.00, output $1.20).
Questions
- Which output rate is lower, Claude Opus 5.5 or GPT-5.5?
- On output, Claude Opus 5.5 is lower: $4.00 on corouter versus $6.00 for GPT-5.5, about 1.50×. Input is $0.800 versus $1.00.
- 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.