Call claude-opus-5 through RouterPlex's OpenAI-compatible API — vendor list price, 0% markup, billed per token from a prepaid balance. No subscription required.
On cost it sits in the premium band of the catalog: the 31st cheapest of 37 comparable text models, at about $0.75 per 100K-in / 10K-out agent turn — cheaper than 3 others on the same key. Its 1M context window ranks 9th of 37.
These examples apply the published input and output token rates directly. Actual cost depends on the tokens your client sends and the model returns.
10K input + 1K output tokens
100K input + 10K output tokens
Every model below runs through the same endpoint and the same API key, so moving between them is a one-line model ID change. Costs are for the same 100K-in / 10K-out turn.
Quality is a separate question from price — see Claude Opus 5 benchmark results before optimising on cost alone. Claude Opus 5 reads images; for generating them see GPT Image 2 pricing.
curl https://api.routerplex.com/v1/chat/completions \
-H "Authorization: Bearer $ROUTERPLEX_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "claude-opus-5",
"messages": [{"role": "user", "content": "Hello!"}]
}'Works with any OpenAI SDK or tool — just change the base URL. See the quickstart.
Through RouterPlex, Claude Opus 5 costs $5.00 per 1M input tokens and $25.00 per 1M output tokens — the vendor list price with 0% markup, billed per token from a prepaid balance you top up from $5.
A 100K-token input with a 10K-token reply costs about $0.75 on Claude Opus 5. That makes it the 31st cheapest of 37 comparable text models on RouterPlex, roughly 69.4× the cost of the cheapest option (DeepSeek V4 Flash).
Kimi K3 from Moonshot is the closest cheaper model on RouterPlex — $0.45 per agent turn against $0.75 for Claude Opus 5, at $3.00/1M input and $15.00/1M output. Both run on the same key and the same endpoint, so switching is a one-line model ID change.
Yes. Per agent turn, Claude Opus 5 costs about $0.75 against $0.80 for GPT-5.5 — 6% less.
Claude Opus 5 supports a 1M token context window on RouterPlex, the 9th largest of the 37 models that publish one.
Yes. RouterPlex serves Claude Opus 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-opus-5".
Compare current API prices and context windows before changing the model ID.