RouterPark is a directory and monitoring site for unofficial and free AI model relays. It catalogues third-party Claude and GPT proxies, providing a dashboard for status and latency while offering its own unified entry point for multiple 'free' upstreams.

Directory is free/login-free; any.routerpark.com proxy (ANTHROPIC_BASE_URL) signup credit: site advertises $20 but probes report ~$2 (+~$10 for posting). Conservative: $2; quota depends on third-party relays.

Super NB (api.super-nb.me) is a Chinese AI API gateway providing OpenAI-compatible access to global LLM providers. It aggregates GPT and Claude models, offering a simplified top-up and usage experience for developers in the region through a New-API based interface.

Nodeloc partner post (2026-08-19): Nodeloc users get $2 signup credit plus weekly lottery and first-top-up promos; e7ai post mentions a claimable $50 subscription voucher. Core remains a paid top-up relay.

Unity2.Ai is a commercial AI infrastructure provider offering seamless access to top Chinese and global AI models (Claude, GPT, Gemini, DeepSeek) via a single OpenAI-compatible API. Features self-developed cluster architecture for high concurrency and smart upstream scheduling. Supports Alipay and WeChat via Stripe.

$2 sign-up credit; Linux.do/V2EX campaign activity (replies, votes, per-100-floors) can add $10-$100 (promotional, unverified terms). Core is pay-as-you-go; no long-term free flagship quota.

OpenRouter is a unified, OpenAI-compatible API aggregating hundreds of model providers behind one key. Free model variants (:free IDs) are genuinely free with documented platform caps — 20 requests/min and 50/day for accounts that have purchased under 10 credits, 1,000/day once you've purchased 10+ — while paid variants have no platform request cap. Fallback routing, per-key credit caps, and BYOK are built in.

:free models cost $0, no card; 20 req/min; 50 :free req/day with <10 credits, 1000/day after buying $10+ credits (verified FAQ; failed reqs count). ~$1.5/mo equivalent at 50 req/day, ~1K tokens/call.

Hvoy AI is a specialized diagnostic and directory site for third-party AI API gateways. It performs continuous latency, uptime, and model-adulteration testing to help developers benchmark and select relay providers. Mirrored at hvoyai.com.

The site is primarily a checker/comparison tool; minor perks: ~20 points on signup, ~10 points to claim one free token, ~20 points for sharing, plus an occasional ~5 CNY (≈$0.74) redeem code; it claims a small daily 'freebie' of reverse-proxied sonnet-4.6/gpt5.3 (e.g. ~50 sonnet4.6 calls/day), with no guaranteed quota or stability.

APIPlus is a third-party AI API relay built on the New-API framework, reselling access to Claude, GPT, and Gemini. It offers a small registration credit and an intermittently available 'free channel' with deep discounts, primarily targeting the low-cost reseller market.

Grants ~$1 registration credit for new users.

Agnes AI, developed by Singapore-based Sapiens AI, is an omni-modal AI platform offering indefinitely free access to core text, image, and video models. It supports OpenAI-compatible API keys and tiered 'Token Plans' for production-level throughput.

Advertised as indefinitely free core-model API with rate/volume caps; signup probe hints ~$1 starter credit (counted). Free tier reportedly sufficient for individual developers and demos.

Bytez is an AI model hosting platform that offers an OpenAI-compatible API for a wide range of models. It provides $1 in free credits that refresh every 4 weeks and uses a low-cost pay-as-you-go pricing model.

$1 free credits, refreshes every 4 weeks

Electron Hub provides a unified API to 600+ models, including premium frontier models (GPT, Claude, Gemini). It offers weekly credit refills on both free and paid subscription plans, plus permanent top-ups.

$0.25 weekly credits on the Free plan.

FastRouter is a high-performance gateway for AI model routing, comparison, and operations. It supports 200+ models via an OpenAI-compatible API with intelligent cost optimization and failover. Details were checked against the provider's own page at fastrouter.ai.

Free credits included to build, test and explore.

Fireworks AI is a self-serve inference platform: per-token serverless (Standard/Priority/Fast tiers) with $1 in free credits and postpaid billing, fine-tuning (LoRA and full-param, priced per 1M training tokens), a shared-pool Serverless Training API, and on-demand GPUs from $8/hr (H100, from Sep 1 2026) to $20/hr (GB300).

Official pricing page: 'Get started with $1 in free credits' (confirmed 2026-09-16).

Hyperbolic (hyperbolic.xyz) is the API-specific endpoint for Hyperbolic's AI cloud. It provides serverless inference for over 25 open-source models through an OpenAI-compatible /v1 endpoint. The platform supports text, image, and audio generation with pay-as-you-go pricing.

~$1 trial credit for new users (DeepSeek V3, Llama 3.1 405B, Qwen); pay-as-you-go after it is used (Llama 405B ~$4/M, DeepSeek R1 ~$3/M tokens).

Nebius AI Studio is a European-based GPU cloud platform providing managed inference for top open-source LLMs like Llama 3.1 and DeepSeek R1. It leverages its own EU data centers to offer high-performance, privacy-compliant inference with transparent pay-as-you-go pricing tailored for both developers and enterprises.

AI Studio grants new accounts ~$1 one-time trial credit (startup/promo programs can grant far more); Nebius AI Cloud free-trial program suspended as of 2026-07-13; studio models otherwise pay-as-you-go.

Rev AI (rev.com API) offers machine transcription (Reverb/Reverb Turbo), translation, summarization and voice agents, plus human transcription. Pay-as-you-go API with free signup credits equivalent to 5 hours of Reverb ASR (usable on all products); volume-based pricing; enterprise options with dedicated account management.

Free credits equivalent to 5 hours of Reverb ASR (official pricing page). At Reverb's published rate of $0.20/hour (via pricing-page search snippet), 5h ≈ $1.00.

Venice (venice.ai) — privacy-focused web app (anonymous or zero-retention) for chat, image, video and audio, known for self-hosted open-weight models plus TEE-hosted closed models. Unofficial browser/cookie integration (merged into existing 'venice' row).

Credits are USD-denominated; Pro $18/mo → $1 credit, Pro+ $68/mo → $75 credit (10% bonus), Max $200/mo → $225 credit (12.5% bonus).

JuCodex is a Chinese-market AI relay specializing in coding models, reselling access to OpenAI's Codex and GPT-4 variants. It features a custom ratio system for billing and provides a small initial credit for new accounts to test compatibility with IDE extensions.

One-off new-user credit: 6 RMB (≈$0.89) on signup (QQ-email only), ratios as low as 0.15; only 1 free entry in /api/pricing, no sustained free quota, essentially pay-as-you-go.

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.

Aion Labs provides specialized fine-tuned models for immersive roleplay and storytelling. Its API is OpenAI-compatible and features a long-term daily free allowance for developers, with higher tiers available upon account top-up.

Daily allowance of ~20K tokens equates to ~$0.50/mo in nominal value.

DXNT (DX Token) is an AI model API gateway providing unified access to GLM, Kimi, MiniMax, and DeepSeek. It offers high compatibility with IDEs and agents, featuring smart routing and MCP support. Details were checked against the provider's own page at dxnt.com.

100+ free calls daily on unified entry.

CloudCode.ONE is a commercial AI proxy optimized for coding workflows (e.g., Claude Code), offering pay-as-you-go access to high-performance models like DeepSeek V4 Pro as a backend replacement with a small trial credit.

Reported signup trial credit of approx. $0.48 (RMB 3.5).

SearchAPI: Google/Bing/Bing/30+ engines SERP API — structured JSON results in seconds; billed only for successful 200-status searches; 100 free requests at signup (no card); prepaid subscription plans $40-$5,000/mo (Developer 10k searches at $4/1k down to Octo 5M at $1/1k); rate limit = 20% of plan credits/hour; up to $2M legal protection guarantee.

100 free signup requests × $0.004/search (Developer plan rate $4/1k) ≈ $0.40 one-time value.

NexoToken is a commercial aggregation relay covering 130+ LLMs with an OpenAI-compatible /v1 endpoint. It uses an ultra-low-multiplier (0.01x-0.03x) billing system and offers a daily refreshing free quota for ~40 models.

~40 models offer daily free quotas that auto-refresh the next day (including some Claude/GPT/Gemini models); claims of sign-up bonus and 7-day no-questions refund are platform self-promotion — actual amounts per the console.

Stability AI sells hosted generative media through a credit-based developer API plus a separate subscription studio. The developer pricing page states API usage is credit-based with 1 credit = $0.01, and lists per-operation credits: Stable Image Ultra 8 credits, Stable Diffusion 3.5 Large 6.5, SD 3.5 Large Turbo 4, SD 3.5 Medium 3.5, SD 3.5 Flash 2.5, Stable Image Core 3, SDXL 1.0 from 0.9, Creative Upscaler 60, Stable Audio 3.0 26 and Stable Fast 3D 10. New developer accounts get 25 free credits, i.e. about $0.25 of usage. The separate Brand Studio product free tier is stated at 1000 credits, then $19/month for 2000 credits or $50/month for 5000 credits, with unused credits not rolling over.

25 free credits for new accounts, stated on platform.stability.ai/pricing alongside the fixed rate "1 credit = $0.01" - equivalent to about $0.25.

BazaarLink is a Taiwan-based AI aggregator providing access to 100+ models via an OpenAI-compatible API. It specializes in TWD billing and unified enterprise invoices. It offers a small signup credit and a persistent free model tier.

Signup trial credit ~$0.20 (probe, no card, no waitlist) counted; plus persistent free deepseek-v4-flash (~10 RPM / 150 RPD) and auto:free routing; PAYG at upstream list price after credit is spent.