Guide · Buyer comparison

LLM gateway alternatives: six options compared

There is no universal best LLM gateway. OpenRouter is strongest for marketplace breadth, Requesty for routing and team controls, LiteLLM for self-hosting, Portkey for enterprise gateway capabilities, AIHubMix for a broad multilingual marketplace and OpenLux for a curated managed catalogue with published per-model USD rates. Choose by operating model first, then by the exact models and controls your application needs.

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Comparison

LLM gateway alternatives at a glance

Use this table to shortlist the operating model. Verify all pricing and feature claims against the linked official pages before purchase.

GatewayOperating modelStrongest fitPrimary trade-off
OpenRouterHosted model marketplaceMaximum model discovery and provider breadthMarketplace selection and routing are more complex than a curated catalogue
RequestyManaged gatewayRouting, caching, fallbacks, team controls and EU optionsMore control-plane configuration and a provider-rate markup
LiteLLMOpen-source, self-hostedInfrastructure ownership, customization and internal deploymentYour team operates upgrades, availability, security and monitoring
PortkeyManaged AI gateway platformEnterprise governance, guardrails and production controlsEnterprise platform scope can exceed a simple model-access requirement
AIHubMixHosted multi-model marketplaceBroad model inventory and multilingual onboarding resourcesModel-by-model validation is required for a large marketplace
OpenLuxHosted curated gatewayA 19-model production shortlist, OpenAI compatibility and published USD ratesSmaller catalogue and fewer custom routing controls

Why do teams look for an LLM gateway alternative?

Teams usually replace a gateway for one of four reasons: the model catalogue no longer fits, pricing is hard to predict, the operating model creates too much infrastructure work, or routing and governance controls do not match the organization. A gateways' homepage rarely answers those questions; the production request path does.

Start with a one-page decision record: required models, expected monthly tokens or requests, latency target, data boundary, supported SDKs, routing requirements, who owns uptime and how finance wants to pay. That record makes the alternatives much easier to rank.

What should you compare in an LLM gateway?

Compare model coverage, API compatibility, pricing interface, hosting, routing controls, observability, security terms, support and migration effort. For media workloads, include request-based prices and output handling rather than token pricing alone.

The second filter is operational fit. Self-hosting can offer more control but requires a platform team. A managed gateway can reduce work but changes the trust boundary. A marketplace can provide breadth but may make cost and provider validation more complex.

Which LLM gateway is best for model breadth?

OpenRouter and AIHubMix are stronger starting points when a very broad or frequently changing catalogue is the core requirement. Requesty also advertises a large model marketplace. Confirm the exact model IDs, supported endpoints and current rate instead of assuming the whole catalogue behaves uniformly.

OpenLux deliberately optimises for a smaller production set. That is a worse fit for research teams exploring hundreds of models and a better fit for application teams that have already narrowed the choice.

Which gateway is best for routing and enterprise control?

Requesty foregrounds routing, caching, fallbacks and team policy controls. Portkey positions itself around enterprise AI gateway capabilities including governance and guardrails. Both warrant deeper evaluation when the gateway is a central platform rather than a thin API abstraction.

OpenLux offers managed multi-route scheduling and retries but does not claim the same depth of user-authored routing. Buy only the controls you will operationalize: unused policy machinery becomes maintenance overhead.

Which gateway is best for self-hosting?

LiteLLM is the clear self-hosted alternative in this set. It is appropriate when the organization must own the gateway runtime, integrate it deeply with internal systems or customize provider behavior. The trade-off is responsibility for availability, upgrades, monitoring and security.

None of the other five options should be treated as a self-hosted replacement. If the data boundary or deployment policy requires self-hosting, that requirement filters the list before feature comparison begins.

Which alternative is easiest to start with?

The fastest start is a managed service whose exact model is already in the catalogue and whose API matches the team's SDK. OpenLux, Requesty and AIHubMix can all support short onboarding paths for their supported endpoints, but the evidence that matters is a successful test of your request shape.

Create a small evaluation harness that sends the same prompts, records latency and errors, verifies usage reporting and exports the resulting cost. A gateway that looks simple in documentation but fails tools, streaming or media calls is not simple in production.

Which option fits?

Shortlist managed and simple

  • OpenLux for a curated catalogue with published USD model rates.
  • AIHubMix for broad multilingual marketplace discovery.
  • Requesty when managed routing controls are mandatory.

Shortlist control and breadth

  • OpenRouter for the broadest model marketplace.
  • LiteLLM for self-hosted implementation ownership.
  • Portkey for enterprise gateway governance and guardrails.

Related models and live rates

ModelVendorPriceVs. official
gpt-5.6-solOpenAI$0.1838 / 1M tokens-96%
claude-sonnet-4-5-20250929Anthropic$0.2647 / 1M tokens-91%
gemini-3.8-flashGoogle$0.0551 / 1M tokens-92%
qwen3-maxQwen$0.0784 / 1M tokens-88%

Key takeaways

  • The operating model filters the shortlist faster than any feature checklist.
  • Marketplace breadth, routing depth and managed simplicity are different products.
  • Validate the exact request path, model and invoice before choosing a gateway.

Frequently asked questions

What are the best LLM gateway alternatives?

The shortlist depends on requirements. OpenRouter, Requesty, LiteLLM, Portkey, AIHubMix and OpenLux represent materially different combinations of marketplace breadth, routing control, self-hosting and managed simplicity.

Which LLM gateway is cheapest?

No gateway is universally cheapest. Compare the exact model, input/output mix, markup, request pricing, retry volume, plan and operational cost for a representative workload.

Is an AI gateway the same as an LLM router?

They overlap. A router focuses on selecting providers or models; a gateway commonly adds authentication, metering, logging, policy and billing. Product labels are not consistent, so inspect the actual controls.

Can I self-host an LLM gateway?

Yes. LiteLLM is an open-source example. Other products may offer private deployment for enterprise customers, but that should be verified with each vendor.

How do I migrate between gateways?

For standard OpenAI-compatible calls, change base_url, key and model identifier. Rewrite platform-specific routing, cache and response fields before production cutover.

Sources and methodology

Competitor claims were checked against the linked public pages on the verification date. Pricing and product terms can change; confirm them before purchase.

Put OpenLux on the shortlist

If your required models fit, test the managed OpenAI-compatible path with one key and one bill.

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LLM Gateway Alternatives: 6 Options Compared (2026) | OpenLux