infer0
OpenAI-compatible · /v1/chat/completions

Frontier AI APIs.
Up to 40% less.

One OpenAI-compatible endpoint for Claude, GPT, Grok, Gemini and the leading open models. Keep your SDK and change the base URL.

  • Claude
  • ChatGPT
  • Grok
  • Gemini
  • Zhipu
  • Kimi
  • DeepSeek
  • MiniMax
model
import os
from openai import OpenAI
 
client = OpenAI(
base_url="https://api.infer0.ai/v1", # the only change
api_key=os.environ["INFER0_API_KEY"],
)
 
resp = client.chat.completions.create(
model="claude-sonnet-5",
messages=[{"role": "user", "content": "Summarize this incident report."}],
)
response
{"id": "chatcmpl-8f2c41…", "object": "chat.completion",
"model": "claude-sonnet-5",
"choices": [{"message": {"role": "assistant",
"content": "• Root cause: expired TLS cert on the edge proxy…"}}],
"usage": {"prompt_tokens": 1204, "completion_tokens": 386}}
✓ 200 OK · 1,204 in / 386 out tokens
cost $0.00439 list $0.00627 −30%

Example request, priced from the rate card below.

Models & pricing

Every major lab. One price list.

Each provider's list price, struck through, next to what you pay on infer0. Same models, same API.

USD per 1M tokens

ModelInputOutputDiscount
Claude Opus 5claude-opus-5 · Anthropic
$5.00/M
$3.50/M
$25.00/M
$17.50/M
30% off
Claude Sonnet 5claude-sonnet-5 · Anthropic
$2.00/M
$1.40/M
$10.00/M
$7.00/M
30% off
Claude Fable 5.1claude-fable-5-1 · Anthropic
$10.00/M
$8.00/M
$50.00/M
$40.00/M
20% off
Claude Haiku 4.5claude-haiku-4-5 · Anthropic
$1.00/M
$0.75/M
$5.00/M
$3.75/M
25% off

List prices are each provider's standard-context rates as published on 11 Sep 2026. DeepSeek is shown at its peak rate.

How it works

No migration. One line of config.

If your code already calls the OpenAI API, switching to infer0 is a config change, not a rewrite.

  1. 01

    Join the waitlist

    We'll email your API key as soon as your spot opens.

    INFER0_API_KEY=sk-in0-••••••••3f9a
  2. 02

    Change your base URL

    Keep your OpenAI SDK, prompts and tooling. One line of config is the whole migration.

    - api.openai.com/v1
    + api.infer0.ai/v1
  3. 03

    Call any frontier model

    Use the model names you already know, frontier or open. One key and one invoice for every lab.

    claude-sonnet-5gpt-5.6-terraglm-5.3deepseek-v4-pro

Stop paying list price for frontier models.

Join the waitlist for early access to infer0.