One API and one bill for hundreds of models across providers.
Works with AI agents:llms.txtBuilt into ReplitOpenRouter is a hosted router in front of many inference providers. One account, one API key and one credit balance give you models from the major labs and open-weight models served by several hosts, without signing up for, integrating and paying each provider separately.
You call https://openrouter.ai/api/v1 using the OpenAI Chat Completions format, with model IDs written as provider/model slugs. For each model, OpenRouter picks among the providers serving it and moves to the next one if a provider errors; you can steer this with provider routing preferences, suffixes such as :nitro (fastest) or :floor (cheapest), or a models list that falls back to other models. Any OpenAI SDK works against it, and it also ships its own TypeScript SDK.
Useful for a small team: bring-your-own-key, where your provider keys are tried first and OpenRouter's capacity is the backup; OAuth PKCE so your app's users can connect their own OpenRouter accounts in one click; guardrails for spend and model access; and broadcasting traces to tools such as Langfuse, PostHog or Datadog. It is a cloud service only, with EU and US in-region routing available on the Business and Enterprise plans.
The main limit is the extra hop: every request passes through OpenRouter's edge, a failed first attempt adds latency before the fallback answers, and if your privacy settings rule out every provider for a model, the request fails rather than falling back.
5 tools, from its own code, website and Product Hunt page.
61 makers' products, each linked to the source that shows it, and 31 open-source projects that declare it in their code.
AI EmailyYour AI inbox that writes like you + replies on autopilot“One API, every model. We route each email task — triage, drafting, summarizing — to the right model per tier without juggling providers or keys. Fallbacks and cost control out of the box. It's the backbone of our agent.”
LLM APIMaker says so +1 · source ↗
inbox-zeroOpen-source AI email assistant that triages, labels and drafts replies to help clear you…LLM APIIn its code +1 · source ↗
omiOpen-source AI wearable with mobile and desktop apps that records conversations and meet…“Huge thanks to OpenRouter for making multi-model AI access seamless and dev-friendly.”
LLM APIMaker says so · source ↗
Context.devWeb data API for software and agents that scrapes and crawls pages into Markdown, search…“OpenRouter because its OpenRouter”
LLM APIMaker says so · source ↗
RightNow AICode editor for GPU/CUDA development with built-in profiling, benchmarking and AI-assist…“Used as the LLM gateway powering model access (Gemini, Llama, GPT-4o, Claude).”
LLM APIMaker says so · source ↗
BudibaseOpen-source low-code platform for internal apps, forms and approval workflows on top of…“We didn’t want to commit to a single model. OpenRouter lets us route across providers, experiment quickly, and use the best model for each task without extra overhead.”
LLM APIMaker says so · source ↗
TaskShellAgent-first task management for more agentic productivity“The most flexible API to manage all your AI models”
LLM APIMaker says so · source ↗
SpeakeasySecurely scale enterprise AI“Gram's tools playground is built on OpenRouter.”
LLM APIMaker says so · source ↗
GuseA simple spreadsheet to build and deploy any AI agent“Super flexible and easy to use; makes working with the different AI models a breeze!”
LLM APIMaker says so · source ↗
ShapeThe Agentic IDE for Designers and Programmers“We needed a simple way to access and switch between different AI models while building Shape's agent. OpenRouter made that much easier during development.”
LLM APIMaker says so · source ↗
Kilo CodeOpen-source AI coding agent for VS Code, JetBrains IDEs and the terminal, with cloud age…“OpenRouter powers Kilo Code's unique feature set with access to 500+ models, transparent pricing, and zero markup, enabling a fast, cost-efficient coding experience for Kilo users.”
LLM APIMaker says so · source ↗“We use OpenRouter to optimize for maximum uptime for all of the third-party models that power Olive. We built Olive around many models across Anthropic, OpenAI, Google, including even open weight models without sacrificing valuable engineering time.”
LLM APIMaker says so · source ↗
Seer PlatformThe fastest way to go from idea to physical product“As I'm using multiple models from multiple providers, unifying an API key was very important, which Open Router made very easy.”
LLM APIMaker says so · source ↗
Actx0Memory infrastructure for AI agents.“We chose it because OpenRouter puts the absolute best model for every specific task right at our fingertips.”
LLM APIMaker says so · source ↗
BreadcrumbOpen-source LLM tracing for agent visibility“Openrouter is the quickest option to get support for any model”
LLM APIMaker says so · source ↗“Its so much easier to develop for one LLM provider that for each one.”
LLM APIMaker says so · source ↗“Shout-out to OpenRouter for giving us seamless multi-model access and letting us switch between AI providers like pros. Their API was a key enabler in testing performance across models and optimizing both cost and quality. An underrated dev superpower.”
LLM APIMaker says so · source ↗
Scribble NetworkThe product that makes AI recommend your brand“We use both. Cloro runs most of our models (GPT, Gemini, Perplexity, Copilot) and is the more economical option there. We added OpenRouter specifically for Grok, since cloro dropped Grok support, and tracking all five engines reliably is the whole point. Different tool per model.”
LLM APIMaker says so · source ↗
TalespinnerAI assisted story writing with complete control“Talespinner uses OpenRouter to allow for switching between different language models. They make it super easy to do this, because they offer one API format for all language models.”
LLM APIMaker says so · source ↗“OpenRouter powers every AI reply in Sellio. One API gives our customers' AI agents access to Claude, GPT and Gemini, and if a provider fails we fall back to another model automatically. No separate contracts, one bill and easy model switching, which made it the obvious choice.”
LLM APIMaker says so · source ↗“Choosing OpenRouter Model Fusion came down to the flexibility of running multiple models side by side and routing requests dynamically through a single unified API, which made testing and integrating different LLM providers effortless for our multi-provider architecture.”
LLM APIMaker says so · source ↗
ChikitAIAgentic AI for Healthcare Triage and Care Automation“used for alternate LLM gateway in discharge summary module”
LLM APIMaker says so · source ↗
CladoThe ground-truth platform for humans.“W inference provider, helped us handle llm traffic”
LLM APIMaker says so · source ↗Open source: a project that declares OpenRouter as a dependency in its public code — verifiable, but not necessarily a live product.
36 makers on why they use OpenRouter, in their own words on Product Hunt.
We measure the carbon footprint of AI usage, so we needed real token volumes to work from. OpenRouter publishes its usage by model, which let us meter a year of its traffic, 1,276 trillion tokens, for our first case study. And for our customers, one OpenRouter connection covers usage across hundreds of models and providers.
We use both. Cloro runs most of our models (GPT, Gemini, Perplexity, Copilot) and is the more economical option there. We added OpenRouter specifically for Grok, since cloro dropped Grok support, and tracking all five engines reliably is the whole point. Different tool per model.
Scribble NetworkSep 2026 ↗OpenRouter powers every AI reply in Sellio. One API gives our customers' AI agents access to Claude, GPT and Gemini, and if a provider fails we fall back to another model automatically. No separate contracts, one bill and easy model switching, which made it the obvious choice.
OpenRouter made it much easier for us to test PenguinHarness across a wide range of models through one consistent API. It significantly reduced the integration work required to support 1,000+ models and helped us compare model behavior, cost, and reliability more efficiently.
PenguinHarnessSep 2026 ↗Choosing OpenRouter Model Fusion came down to the flexibility of running multiple models side by side and routing requests dynamically through a single unified API, which made testing and integrating different LLM providers effortless for our multi-provider architecture.
Themes that recur in makers' words and Hacker News comments, each linked to what it summarises, with how Product Hunt tags its reviews.
Not by default; it keeps request metadata such as token counts and latency. Logging your prompts for your own debugging, or letting OpenRouter use them in exchange for a discount, are both opt-in settings. source ↗
Providers that log or train on data, or whose policy OpenRouter could not confirm, are only used if you enable that in your privacy settings. If a request's provider choices don't meet your privacy settings, it returns an error instead of completing. source ↗
Yes. Keys are stored encrypted and can be marked as prioritized (tried before OpenRouter's endpoints) or fallback (tried after); by default OpenRouter's shared capacity is used if all your keys fail. BYOK usage carries a small fee described on the pricing page. source ↗
OpenRouter automatically tries the next provider for that model. Pass a models array to also fall back to other models when the first one errors, is rate-limited or refuses for moderation reasons. source ↗
On the Business and Enterprise plans, send requests to https://eu.openrouter.ai (or us.openrouter.ai) and they are decrypted and routed only to provider endpoints in that region. source ↗
Yes. OpenRouter implements the OpenAI API specification, so any SDK or framework that supports OpenAI can be pointed at it. source ↗
Free models have a daily request cap that depends on whether you have bought a minimum amount of credits; paid usage follows separate rate limits. source ↗
Yes — there is a free tier a small product can run on; paid use starts at Pay per token + 5.5% fee on credits. source ↗
Not open source, and hosted only.
It serves an llms.txt docs index; Replit set it up natively.
61 makers' products we track, each with a source, and 31 open-source projects declare it in their code. source ↗
Clerk
Next.js
Resend
Stripe
Vercel
LiteLLM
Groq
Claude
OpenAI API
Gemini API
Mistral AI
DeepSeek