GPT-5.1

Call GPT-5.1 in one line

GPT-5.1 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="openai/gpt-5.1",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(resp.choices[0].message.content)

GPT-5.1 FAQ

How much does GPT-5.1 cost through Final Router?

$1.25 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 GPT-5.1's context window?

400,000 tokens.

Does GPT-5.1 train on my data?

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

How do I call GPT-5.1?

Point any OpenAI-compatible client at https://finalrouter.com/api/v1 with your Final Router key and set model to "openai/gpt-5.1". Your existing code does not change.