Claude Sonnet 5

Call Claude Sonnet 5 in one line

Claude Sonnet 5 speaks through the same OpenAI-compatible endpoint as every other model. Point your existing client at Final Router, set the model id, and you also get automatic fallback, spend caps and usage tracking - none of which the provider gives you directly.

from openai import OpenAI

client = OpenAI(
    api_key="fr_live_...",                     # your Final Router key
    base_url="https://finalrouter.com/api/v1"  # the only line you change
)

resp = client.chat.completions.create(
    model="anthropic/claude-sonnet-5",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(resp.choices[0].message.content)

Claude Sonnet 5 FAQ

How much does Claude Sonnet 5 cost through Final Router?

$2 per million input tokens and $10 per million output tokens - the provider's own list price, with no markup on tokens. A 5.5% fee applies only when you add credits.

What is Claude Sonnet 5's context window?

1,000,000 tokens.

Does Claude Sonnet 5 train on my data?

No. On the endpoint Final Router calls, Anthropic does not train on your prompts. Data is processed in US.

How do I call Claude Sonnet 5?

Point any OpenAI-compatible client at https://finalrouter.com/api/v1 with your Final Router key and set model to "anthropic/claude-sonnet-5". Your existing code does not change.