Call claude-sonnet-5 through RouterPlex's OpenAI-compatible API — vendor list price, 0% markup, billed per token from a prepaid balance. No subscription required.
Anthropic introductory pricing through August 31, 2026; the published rate becomes $3 input / $15 output per 1M tokens on September 1, 2026.
curl https://api.routerplex.com/v1/chat/completions \
-H "Authorization: Bearer $ROUTERPLEX_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "claude-sonnet-5",
"messages": [{"role": "user", "content": "Hello!"}]
}'Works with any OpenAI SDK or tool — just change the base URL. See the quickstart.
Through RouterPlex, Claude Sonnet 5 costs $2.00 per 1M input tokens and $10.00 per 1M output tokens — the vendor list price with 0% markup, billed per token from a prepaid balance you top up from $5. Anthropic introductory pricing through August 31, 2026; the published rate becomes $3 input / $15 output per 1M tokens on September 1, 2026.
Claude Sonnet 5 supports a 1M token context window on RouterPlex.
Yes. RouterPlex serves Claude Sonnet 5 through an OpenAI-compatible endpoint at https://api.routerplex.com/v1 — point any OpenAI SDK or tool at that base URL with your RouterPlex key and set model to "claude-sonnet-5".