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

DeepSeek's official API serves the current V4.1-Flash and V4-Pro models with 1M-token context and 384K max output, from $0.15/$0.60 per 1M in/out off-peak (Flash) — peak hours bill at 2x, cached input drops to $0.003/M. One key exposes both an OpenAI-compatible and an Anthropic-compatible endpoint, and sign-up grants a free token balance that is deducted before any top-up.

Free 'granted balance' of ~5M tokens at sign-up (deducted before top-ups per official billing rules); $0.70 is an estimate at V4-Flash off-peak rates.

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).

HelixMind is an AI API router designed to manage and optimize costs across hundreds of LLMs through a single endpoint. It native speaks the OpenAI API format and features automatic model selection by price and task requirement, ensuring enterprise-grade reliability.

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

LLM Gateway is a unified AI API router that allows access to over 200 models from multiple providers. It features a 'Hosted Free' plan where free models are accessible with a 5 requests per 10 minutes limit when no credits are available in the account.

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

MNN AI (mnnai.ru) is a Russian AI API aggregator offering access to models like GPT-5.6 and Claude 5. It features a free entry tier with $1 monthly credits and strict rate limits (10 RPM), designed for low-volume testing and regional access.

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

MegaNova AI is a comprehensive AI API aggregator and infrastructure provider, offering access to 200+ models including GPT-5.6, Claude 4, and proprietary Manta models. It features a tiered free quota system based on account status and spend, plus OpenAI-compatible serverless and dedicated GPU endpoints.

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