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claude-sonnet-5 API — frequently asked questions
Frequently asked questions
Which model name should I use with the Claude Sonnet 5 API proxy?
The model name is claude-sonnet-5. The specific field structure, message format, and available parameters in the request body should follow the proxy platform's documentation.
How much does claude-sonnet-5 cost?
The baseline input price for claude-sonnet-5 is $2 and the baseline output price is $10, both per 1 million tokens. The baseline cache-hit price is $0.2 / 1 million tokens, and the final price must be multiplied by the user's group multiplier.
Why might the billed price differ from the baseline price shown on the page?
Because the final price equals the baseline price multiplied by the multiplier for the user's group. Confirm the account group in the dashboard before making calls, and distinguish input, output, and cache-hit usage when reviewing the invoice.
What is the context window for Claude Sonnet 5?
The provided model description indicates a default and maximum context window of 1 million tokens. It also specifies a maximum output limit of 128k tokens. Actual requests should still follow the API response and platform limits.
What are the limitations of calling Claude Sonnet 5 through a proxy?
Proxy calls add an extra network hop, so latency, troubleshooting, and API behavior must be verified in the actual environment. New official features, parameters, or models may experience integration delays on the proxy side, and the support scope may also differ.
Does the dashboard support only the models listed on the page?
No. The dashboard data showed 452 models available when retrieved, while the provided pricing list includes only the 150 models with higher usage. Another 302 models are not listed in that pricing list.
When was Claude Sonnet 5 released?
The specific release date of Claude Sonnet 5 has yet to be verified in testing. What can currently be confirmed is that claude-sonnet-5 was listed in the dashboard pricing data retrieved at 2026-08-04T16:16:08Z.
Still stuck? Full documentation and support are at https://api.openlux.ai.
- How do you call the claude-sonnet-5 API?Setup steps and copy-pasteable code
- claude-sonnet-5: direct API or gateway?Point-by-point, including the limitations
Get started
First confirm the claude-sonnet-5 group and credentials in the dashboard, then complete integration validation with a minimal request
Official site: OpenLux Claude Sonnet 5 API proxy
Last updated 2026-08-05 | Written and maintained by OpenLux.
Latency and pricing figures come from our own measurements. Where they differ from the vendor's site, the vendor's live page wins.