Claude Opus 5 (Fast) API
anthropic/claude-opus-5-fast
Call Claude Opus 5 (Fast) through UberLLM’s OpenAI-compatible API — from $4.27/M input and $21.34/M output, routed automatically to the cheapest healthy seller. Anthropic · 1,000,000 token context. Fee included.
Claude Opus 5 (Fast) pricing
- Input
- $4.2686
- Output
- $21.343
- Cached input
- $0.4269
- Input
- $11.00
- Output
- $55.00
- Cached input
- $1.10
| Provider | Input | Output | Cached input |
|---|---|---|---|
| Venice AI | $10.00 | $50.00 | $1.00 |
| OpenRouter | $10.00 | $50.00 | $1.00 |
UberLLM routes every request to the cheapest healthy seller for this model. The price shown includes UberLLM’s 10% fee.
How to use Claude Opus 5 (Fast) with the OpenAI SDK
Already using the OpenAI SDK? Change one line — the base URL — and call Claude Opus 5 (Fast) with your existing code. Anthropic SDKs work against https://api.uberllm.dev/v1/messages.
from openai import OpenAI
client = OpenAI(
base_url="https://api.uberllm.dev/v1",
api_key="ull_your_key_here",
)
resp = client.chat.completions.create(
model="anthropic/claude-opus-5-fast",
messages=[{"role": "user", "content": "Hello!"}],
)
print(resp.choices[0].message.content)Claude Opus 5 (Fast) API — FAQ
How much does the Claude Opus 5 (Fast) API cost?
Claude Opus 5 (Fast) is listed from $4.27 per million input tokens and $21.34 per million output tokens through UberLLM, which routes each request to the cheapest healthy seller on a live marketplace and bills the price shown, which includes UberLLM's 10% fee.
How do I call Claude Opus 5 (Fast) via API?
Use any OpenAI-compatible SDK: set the base URL to https://api.uberllm.dev/v1, your UberLLM API key, and model "anthropic/claude-opus-5-fast". Anthropic SDKs work via https://api.uberllm.dev/v1/messages.
Is Claude Opus 5 (Fast) OpenAI-compatible on UberLLM?
Yes. Every model on UberLLM — including Claude Opus 5 (Fast) — is served through one OpenAI-compatible endpoint, so you change only the base URL and key.