AI API Router Directory

OpenInference - open-source LLM relay with a single OpenAI-compatible endpoint (Anthropic-format root also available at https://api.openference.com/), API-key auth, automatic provider failover and a zero-data-retention option; free to start, paid plans from USD 1/mo; documented per-model on-demand USD/1M pricing on openference.com/models.

Free plan: 3-day trial with open-source models — no credit card required

The Cloudflare AI Playground at playground.ai.cloudflare.com is a browser environment for experimenting with, benchmarking and tuning AI models, with a Model mode for testing system prompts and run settings, a Compare mode for side-by-side evaluation of models under identical prompts, and an experimental Generative UI mode. It is the front end for models that Cloudflare hosts and serves, and the free access terms come from Workers AI: the free allocation allows anyone to use a total of 10,000 Neurons per day at no charge, with additional usage on the Workers Paid plan billed at $0.011 per 1,000 Neurons. The model catalog covers 65 models including Llama, Qwen, DeepSeek, Kimi, GLM, Gemma, Mistral, Nemotron, Whisper and FLUX families, and the playground itself states that output is unverified and does not reflect Cloudflare's views.

Free allocation is stated as 10,000 Neurons per day at no charge on the Workers AI pricing page, equivalent to about $0.11/day at the published rate of $0.011 per 1,000 Neurons (the dollar figure is a conversion, the allowance is official).

Featherless AI provides serverless access to LLMs and agent runtimes. It offers subscription-based 'Chat' plans with unlimited tokens and credit-based 'Developer' plans for API usage. Details were checked against the provider's own page at featherless.ai.

Free tier available — no credit card required

Qwen Cloud / Alibaba Cloud Model Studio is the API and model-marketplace side of Qwen, reachable internationally at qwencloud.com and in mainland China through Bailian at bailian.console.aliyun.com. The international marketplace page states that new users get 70M+ free tokens and advertises full-modality access from $6/month. Chinese-language Model Studio documentation states that activating Bailian for the first time automatically issues a newcomer free quota per model, usually 1,000,000 tokens, valid for 90 days and available only in the Beijing (cn-beijing) region.

Free grants are token allowances, not currency: 70M+ tokens for new users on the international Qwen Cloud marketplace, and typically 1,000,000 tokens per model (90 days, cn-beijing only) on Chinese Model Studio.

Qwen Studio is the consumer web app and desktop/mobile client for the Qwen model family, served at qwen.ai and app.chat.qwen.ai. The official product page states that Qwen Studio is free to use and open to all, and the same page lists Thinking, Search, Deep Research, Web Dev, Artifacts, Image Generation, Image Edit and Video Generation as product features. No paid consumer subscription and no numeric usage caps are published on the official pages fetched.

No numeric free allowance is published on official pages (checked 2026-09-16); qwen.ai states only that Qwen Studio is free to use and open to all.

Regolo AI provides scalable serverless AI infrastructure with a focus on privacy and zero data retention. It serves popular open-source models (Llama, Mistral, Qwen) via an OpenAI-compatible API, offering monthly token capacity plans and a flexible free trial.

No public free-tier information found in the source reference; treat free-tier availability as unverified rather than confirmed absent.

Routeway is an AI model router and gateway that provides a unified Bearer-auth interface for multiple global and domestic models. It simplifies integration for developers by handling model-specific protocols and providing a consistent management dashboard for keys and usage.

No public free-tier information found in the source reference; treat free-tier availability as unverified rather than confirmed absent.

Synthetic runs open-source AI models in private, secure datacenters with an emphasis on privacy and security. It offers an OpenAI-compatible API for integration with standard tools. Access is available via a monthly subscription or standard usage-based pricing.

No public free-tier information found (researched 2026-08-29).

Yolo-Auto offers flat-rate LLM API pricing specifically designed for coding agents and high-context developer workflows. It provides an OpenAI-compatible endpoint with no per-token billing on paid plans, emphasizing predictable costs and private inference (no routine prompt logging).

No public free-tier information found in the source reference; treat free-tier availability as unverified rather than confirmed absent.