First-pass shortlist for this landing page
LLMEndpoint
LLM API Aggregators
Unified APIs, routing layers, and gateway-style platforms that help teams access multiple model providers from one interface.
Short answer
LLM API Aggregators are usually a strong fit for teams that need fallback, usage tracking, model routing, provider optionality, or OpenAI-compatible access across vendors. The main tradeoff is another dependency in the request path, passthrough pricing complexity, and upstream/provider disclosure questions.
Useful for migration and fallback research
Relevant for agents and structured workflows
Start here if LLM API Aggregators sound close to your need
Use these cues to decide whether this category belongs in the shortlist before you spend time comparing vendors inside it.
Strong fit when
- Teams that need fallback, usage tracking, model routing, provider optionality, or OpenAI-compatible access across vendors.
- You want routing, fallback, or multi-provider operations more than one direct vendor.
Wrong fit when
- Another dependency in the request path, passthrough pricing complexity, and upstream/provider disclosure questions.
- You only need one provider and do not want another architecture layer.
Best next action
Decide whether your real need is access breadth, gateway control, or observability before comparing tools.
Who should use this category?
Teams that need fallback, usage tracking, model routing, provider optionality, or OpenAI-compatible access across vendors.
Common risks
Another dependency in the request path, passthrough pricing complexity, and upstream/provider disclosure questions.
How to Evaluate LLM API Aggregators
Use this path to go from category research to a realistic shortlist.
Workflow
Find out whether LLM API Aggregators fit your use case
Use the finder when you know the product job-to-be-done but are still unsure which provider type belongs in the shortlist.
WorkflowCompare final candidates side by side
Move from broad category research to one-on-one comparisons once you have a shortlist of serious options.
WorkflowModel the real monthly cost
Estimate token spend only after you know which providers and model families are realistic contenders.
Providers
Compare the current dataset for this category.
| Provider | Category | Supported models | OpenAI-compatible | Starting price | Context | Tool calling | Vision | Streaming | Status | Trust | Links |
|---|---|---|---|---|---|---|---|---|---|---|---|
| OpenRouter | LLM API Aggregators | GPT, Claude, Gemini, DeepSeek-V4 | Yes | Varies by model route | Model dependent across upstream routes | No | Yes | Yes | Available | 11/15 | |
| Portkey | LLM API Aggregators | GPT, Claude, Gemini, DeepSeek-V4 | Yes | Plan dependent plus provider spend | Provider dependent | No | Yes | Yes | Available | 11/15 | |
| LiteLLM Cloud | LLM API Aggregators | GPT, Claude, Gemini, Mistral | Yes | Plan dependent | Provider dependent | No | Yes | Yes | Unclear | 10/15 | |
| Helicone | LLM API Aggregators | provider dependent | Yes | Plan dependent | Provider dependent | No | Yes | Yes | Available | 11/15 |
Start with these providers
Use these cards if you want a faster route from category page to shortlist review.
OpenRouter
Unified API for accessing many models and providers through a routing and marketplace-style interface.
Models: GPT, Claude, Gemini
Portkey
AI gateway and observability platform for routing, fallback, guardrails, caching, and provider management.
Models: GPT, Claude, Gemini
LiteLLM Cloud
Hosted/commercial option around LiteLLM's unified interface for many LLM providers.
Models: GPT, Claude, Gemini
Compare these next
These next steps are usually more useful than staying too long in list-browsing mode.
If this category is not the right fit
Use these pivots instead of forcing the wrong provider type into the shortlist.
Do not need an intermediary anymore?
Actually want direct open-model serving?
Related guides
Use these to understand tradeoffs before choosing.