Model comparison
Claude Sonnet 5 vs GPT-5.4
List rate, corouter rate, context, and which ID to send for claude-sonnet-5 versus gpt-5.4. A sample of 1 million input tokens plus 200 thousand output tokens is about $0.800 on corouter (input $0.400, output $0.400). A sample of 1 million input tokens plus 200 thousand output tokens is about $1.10 on corouter (input $0.500, output $0.600).
| Claude Sonnet 5 | GPT-5.4 | |
|---|---|---|
| ID | claude-sonnet-5 | gpt-5.4 |
| Vendor | Anthropic | OpenAI |
| List input | $2.00 | $2.50 |
| corouter input | $0.400 | $0.500 |
| List output | $10.00 | $15.00 |
| corouter output | $2.00 | $3.00 |
| Cache read | $0.040 | $0.050 |
| Context | 1M | 1.1M |
Price gap
On output, Claude Sonnet 5 is lower: $2.00 on corouter versus $3.00 for GPT-5.4, about 1.50×. Input is $0.400 versus $0.500.
Window and modalities
GPT-5.4 lists a 1.1M window and Claude Sonnet 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 Sonnet 5 is listed with these modalities: Chat, Vision, Code. GPT-5.4 is listed with these modalities: Chat, Reasoning, Vision.
When to send claude-sonnet-5
Claude Sonnet 5 lists below Sonnet 4.6 on both input and output and keeps the 1M window plus the Code tag. Send claude-sonnet-5 for that newer Sonnet ID.
This ID uses the familiar messages JSON shape. The other side is gpt-5.4 from OpenAI. corouter is not affiliated with OpenAI or Anthropic.
When to send gpt-5.4
GPT-5.4 is the general 1.05M GPT row beneath the Pro rate and above Mini. Send gpt-5.4 for chat, reasoning, and vision without the Pro multiplier.
This ID uses the familiar chat-completions JSON shape. The other side is claude-sonnet-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 $0.800 on corouter (input $0.400, output $0.400).
A sample of 1 million input tokens plus 200 thousand output tokens is about $1.10 on corouter (input $0.500, output $0.600).
Questions
- Which output rate is lower, Claude Sonnet 5 or GPT-5.4?
- On output, Claude Sonnet 5 is lower: $2.00 on corouter versus $3.00 for GPT-5.4, about 1.50×. Input is $0.400 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.