One OpenAI-compatible endpoint in front of every frontier model. Millions of tokens per minute, automatic failover when an upstream provider fails, and an invoice your finance team will accept.
No monthly minimum · Pay per token · Invoice on demand
12M+
tokens per minute
99.98%
gateway uptime, trailing 90 days
<40ms
added routing latency, p50
40+
models behind one endpoint
Trusted by engineering and research teams
Drop-in compatible
BestAGI speaks the OpenAI protocol exactly. Point your existing client at the gateway and every SDK, framework, and agent runtime you already use keeps working — streaming, tool calls, structured output, vision, embeddings.
from openai import OpenAI
client = OpenAI(
api_key="sk-bag-...",
base_url="https://api.bestagi.com/v1", # <- the only change
)
resp = client.chat.completions.create(
model="claude-opus-5",
messages=[{"role": "user", "content": "Summarise this changelog."}],
)
print(resp.choices[0].message.content)
print(resp.usage.total_tokens, "tokens")Why BestAGI
Capacity, honesty about what runs upstream, paperwork that clears finance, and economics that reward volume.
The founding team came out of cloud platform groups where uptime was the product. The gateway is cloud-native end to end: horizontal routing tiers, per-region capacity pools, and a control plane that keeps serving when an upstream provider does not.
Every request goes to the real upstream model. No silent substitution, no distilled stand-ins, no prompt rewriting. Responses come back byte-for-byte as the provider returned them, with the original usage accounting attached.
Download a compliant invoice and receipt for every order, the moment you need it. Finance gets the same paperwork it would get buying direct, without an email thread or a support ticket in the middle.
Refer a team and earn recurring commission on their spend for as long as they stay. Spend more yourself and a rebate lands back on your balance each month — the tiers are published, not negotiated case by case.
Built for professionals
The same endpoint serves a two-person prototype and a pipeline burning a billion tokens a month.
Serve customer-facing traffic through a gateway that treats a 500 from upstream as its problem, not yours.
Batch pipelines that need sustained throughput, with capacity pools sized for hundreds of millions of tokens a day.
Reproducible access to current frontier models, with usage broken down per project so grant reporting is trivial.
Ship a prototype on Friday without a procurement cycle. Swap the base URL, keep every SDK you already use.
High-concurrency generation for synthetic datasets, eval harnesses, and teacher-student training runs.
Works with the editors and agents your team already runs — anything that speaks the OpenAI protocol.
Milestones
March 2023
BestAGI launched as a developer-first API gateway — metered usage, no monthly minimum, no chat wrapper. Word of mouth in developer communities carried the first year of growth.
April 2023
A direct capacity partnership put extended-context models in customers' hands within weeks of release, at a point when access was otherwise gated behind months-long waitlists.
July 2023
A dedicated billing entity and finance module went live, so every customer can pull a compliant invoice and receipt themselves with no human in the loop.
November 2023
During a major provider outage the failover layer detected degraded upstreams and rerouted to alternate regional capacity automatically. Customer traffic kept flowing; nobody had to be paged.
December 2023
Formal programs with university labs and independent research groups, with discounted academic capacity and per-project usage reporting.
2024 — today
Anthropic, OpenAI, and Google models now sit behind the same OpenAI-compatible surface, with routing policies, spend caps, and per-key budgets on top.
FAQ
Change the base URL and the API key. Every official OpenAI SDK, and every framework built on the OpenAI protocol, works unmodified — including streaming, tool calls, structured outputs, and vision.
One key and one invoice across every provider, automatic failover when an upstream degrades, per-key budgets and spend caps, and usage analytics that span models. The responses themselves are identical.
A published multiplier on list price — 1.5x on Business, 1.25x on Developer, 1.1x on Enterprise — with no seat fees or monthly minimum. Full detail on the pricing page.
Yes. Every order produces an invoice and a receipt you can download yourself from the dashboard, issued by the billing entity, with your company details on it.
Health checks run continuously against every upstream. When one degrades, traffic shifts to alternate capacity for the same model family within seconds. You see elevated latency at worst, not errors.
No. Requests are proxied to the provider and the response is returned. Prompt and completion bodies are not retained beyond the request lifecycle; only usage metadata is stored for billing and analytics.
Create a key, change the base URL, and send your first request in under a minute. Pay for the tokens you use — nothing else.
Questions about volume? Talk to the team