Claude Sonnet 4.5 API pricing
A proven model with broad compatibility across Claude Code and coding workflows.
Pricing details
The table shows the lowest group-discounted price in USD per 1 million tokens. It uses the lowest multiplier among this model’s enabled groups: ccmax正价线 at 1.2×. If your account belongs to a different group, your charge will differ. Always use the current price shown in the console as the billing authority.
Scroll horizontally to view the full table.
| Item | Price (lowest group) | Description |
|---|---|---|
| Input (prompt) | $3.59 / 1M tokens and up | Includes the ccmax正价线 group multiplier |
| Output (completion) | $17.95 / 1M tokens and up | Includes the ccmax正价线 group multiplier |
| Billing group | ccmax正价线 | 1.2×, the lowest multiplier available for this model |
| Context window | 200,000 tokens | Common published specification; the model’s actual upstream limit applies. |
| Model ID | claude-sonnet-4-5-20250929 | |
API example
Call Claude Sonnet 4.5 with the OpenAI-compatible API format:
curl https://qionggeme.com/v1/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer $YOUR_API_KEY" \
-d '{
"model": "claude-sonnet-4-5-20250929",
"messages": [
{"role": "user", "content": "Hello"}
]
}'Frequently asked questions
How much does the Claude Sonnet 4.5 API cost?
Claude Sonnet 4.5 (claude-sonnet-4-5-20250929) is displayed at the lowest enabled group rate: about $3.59 per 1 million input tokens and $17.95 per 1 million output tokens through group ccmax正价线 at 1.2×. Your actual charge depends on your account’s current group; check the console for the billing price.
What context window does Claude Sonnet 4.5 support?
Claude Sonnet 4.5 commonly supports a context window of about 200,000 tokens. The actual upstream model limit applies.
How do I connect to the Claude Sonnet 4.5 API?
Create an API key in qionggeme, set the API Base to https://qionggeme.com—usually https://qionggeme.com/v1 in OpenAI-compatible clients—and use model ID claude-sonnet-4-5-20250929. Do not use the content-site URL https://qionggeme.com/docs.