Top 10 AI Model Aggregation Platforms Compared (2026)

Side-by-side comparison tables for features, pricing, model count, and latency across OpenRouter, Together AI, Cloudflare AI Gateway, Bifrost, LiteLLM, Celedog, and five others. Use case fit for each.

By 2026 the AI model aggregation market has matured into a real category with a dozen credible options. They split into two camps: thin proxies that route requests but leave the billing relationship with each provider, and full gateways that hold the wallet, meter every token, and give you one statement. This round-up compares the ten that matter, what each is best at, and who should pick which.

How we compare them

Five dimensions decide a gateway in production: model coverage, pricing model (markup vs pay-as-you-go), API compatibility, routing and failover, and regional payment fit. A platform can lead on coverage and still be wrong for your team if it cannot take the currency your users actually pay in.

The ten platforms at a glance

Platform	Type	Models	Best for
OpenRouter	Full gateway	300+	Breadth, Western cards
Together AI	Inference host	200+ open	Open-weight + fine-tuning
Cloudflare AI Gateway	Observability proxy	Bring-your-own	Caching + analytics on your own keys
Celedog	Full gateway	200+	China + Indonesia, multi-currency wallet
LiteLLM	Self-hosted proxy	Bring-your-own	Teams that want to own the infra
Bifrost	Self-hosted proxy	Bring-your-own	High-throughput Go proxy
Portkey	Full gateway	250+	Guardrails + prompt management
Eden AI	Aggregator	Multi-task	Vision/speech/text in one API
Requesty	Full gateway	150+	Spend controls
Helicone	Observability proxy	Bring-your-own	Logging + tracing first

Full gateways vs proxies

The single most important distinction is who holds the billing relationship. With a proxy (Cloudflare AI Gateway, LiteLLM, Bifrost, Helicone) you still sign up with every provider, hold every key, and reconcile every invoice — the proxy adds caching, logging or routing on top. With a full gateway (OpenRouter, Celedog, Portkey, Requesty) you top up one wallet and never touch a provider account; the gateway buys upstream capacity and resells it per token.

Proxies suit teams with existing provider contracts and a strong platform team. Full gateways suit teams that want to ship features, not manage a dozen billing accounts.

Where each one wins

OpenRouter

The breadth leader. The largest public model catalog, a clean OpenAI-compatible API, and a popular usage leaderboard. Pricing is the upstream rate plus a small platform fee, paid in USD via card or crypto. The weak spot is regional: it is built around Western payment rails.

Together AI

Less a router than a high-performance host for open-weight models, with fine-tuning and dedicated endpoints. Pick it when you live on Llama, Qwen, Mixtral and friends and want fast, cheap inference plus the option to train.

Cloudflare AI Gateway

An observability and caching layer in front of your own provider keys. Zero markup because it never holds the billing relationship; in exchange you still manage every account. Excellent if you already have contracts and just want analytics, caching and rate-limiting.

Celedog

A full gateway built for the China and Indonesia markets: 200+ models behind one OpenAI-compatible API, a single wallet that displays and settles in USD, CNY and IDR, auto-routing, and local payment rails (WeChat Pay, Alipay, Xendit) that the Western-first platforms do not take. The right pick when your users pay in yuan or rupiah.

LiteLLM & Bifrost

Self-hosted proxies for teams that want to own the routing infrastructure. LiteLLM is the Python-ecosystem default; Bifrost is a Go proxy built for throughput. No markup, full control, and all the operational burden that implies.

How to choose in 60 seconds

You want maximum models, pay by card, US/EU based → OpenRouter.
Your users pay in CNY or IDR → Celedog.
You already hold provider contracts, just want analytics → Cloudflare AI Gateway or Helicone.
You live on open-weight models and may fine-tune → Together AI.
You want to self-host the proxy → LiteLLM or Bifrost.
You need guardrails and prompt management → Portkey.

There is no single best aggregator — only the best fit for your model mix, your platform team's appetite, and the currency your customers actually hold.