AI API Router Directory

Azure OpenAI (Microsoft Foundry) serves the GPT family per 1M tokens in three priced deployment scopes — Global, Data Zone (EU/US, +10%) and Regional (up to 27 regions): GPT-5.6 Sol $5/$30 (short context, Global), Terra $2/$12, Luna $0.20/$1.20, gpt-oss-120b $0.15/$0.60. Batch (−50%) and PTU reservations (from $1/PTU/hr Global) sit under the same account; new Azure accounts carry a $200/30-day trial credit.

New Azure accounts: $200 credit for 30 days (stated on the Azure OpenAI pricing page; Azure-wide, applicable to Azure OpenAI — verified 2026-09-16). No standing free tier beyond it.

Helyx markets itself as a unified OpenAI-compatible API gateway for frontier models (Claude Opus 5, Claude Haiku 4.5, GPT-5.4 Nano, Gemini, Kimi, DeepSeek) claiming 50+ models behind one endpoint, with a published rate card of five active models including DeepSeek-V4 Pro at $0.400 in / $0.750 out per 1M tokens (50% off its $0.800/$1.50 list) and MiniMax M3 at $0.300/$1.200. Signup is Google or GitHub with no password, and the account is credited with $10.000000 free: $2.000000 instantly plus $8.000000 released on request. Paid top-ups are crypto-only (USDT, USDC, BTC, ETH, TRON) and every deposit is doubled ($5 pays $10 credit, $25 pays $50), with credits stated to never expire and no subscriptions or daily caps. The domain in this listing, helyx.ai, is dead - it returns a 404 DEPLOYMENT_NOT_FOUND from Vercel - and the live Helyx AI site is served from helyxai.space.

$10.000000 signup credit ($2.000000 instant, $8.000000 released on request) as stated on the helyxai.space homepage and pricing page; the $10 figure is the operator's own published grant, not a conversion.

VSLLM (Weiyun Model Open Platform) is a commercial AI API relay gateway that aggregates multiple large models. It is OpenAI-compatible and features a daily auto-refreshing free quota for new sign-ups. Claims to offer highly competitive, transparent pricing based on actual token usage.

Free subscription auto-refreshes daily without claiming: ~20 API calls + ~100K tokens/day (non-cumulative, reset next day) ~ $3/mo at $1/1M tokens; also GitHub-star and daily check-in reward activities.

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.

Command Code is an AI coding API aggregator offering subscription-based access to a curated selection of open and premium models. It simplifies key management for developers by providing a unified gateway with generous monthly usage limits.

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

Duck.ai is DuckDuckGo's free, private AI chat (also surfaced at duckduckgo.com/duckchat). It requires no account and offers chat, voice, image, and search across models including OpenAI GPT (e.g., '5.6 Luna') and Claude.

Free anonymous chat; an 'Upgrade'/Pro option exists but pricing not quantified on fetched pages.

Freebuff is a specialized AI API relay often associated with developer automation and coding tools. It provides programmatic access to high-end models for free or via community-shared keys, primarily aimed at script-based integration and tool builders.

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

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.

Kenari is an Indonesian AI gateway providing a unified OpenAI-compatible API to 38+ models from Claude, GPT, and Gemini. It is uniquely tailored for the Indonesian market, accepting local payment methods like QRIS and billing in Rupiah (IDR).

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

LaoZhang AI is an enterprise-grade AI API integration platform reselling over 200 models from OpenAI, Anthropic, and Google. It provides an OpenAI-compatible interface, invoice support for businesses, and a small signup credit ($0.05) for testing.

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

LiteRouter is an AI API aggregator that provides access to hundreds of models from various providers via a single OpenAI-compatible interface. It supports free models with specific daily limits and pay-as-you-go billing for premium variants.

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

Naga.ac is a unified AI aggregator providing access to over 240 models via one OpenAI-compatible API. It offers a free tier with 100 requests per day and a pay-as-you-go model with competitive rates, occasionally lower than direct provider pricing for select models.

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

OpenAI Codex CLI — OpenAI's terminal coding agent (also web/IDE). Authenticates via ChatGPT OAuth or an API key. Model lineup (as of mid-2026): GPT-6 Astra, GPT-5.6 (Sol/Terra/Luna), GPT-5.5, GPT-5.4 / 5.4 mini, plus gpt-oss-120b; GPT-5.3-Codex-Spark is a Pro-only research preview. Plans: Free, Go ($8), Plus ($20), Pro 5x ($100) / 20x ($200); API-key mode is pay-as-you-go at API rates.

ChatGPT plans use credit-based usage allowances (credits per 1M tokens, e.g. GPT-5.6 Sol 100/10/500); not a fixed $ credit value. API-key mode billed at standard OpenAI API token rates.

TGhan (Xiao Yu Yun API) is a feature-rich AI API relay providing unified access to over 30 LLM providers including OpenAI, Claude, and Grok. It offers professional features like empty-response compensation, transparent usage logs, and multi-protocol support optimized for high stability.

Confirmed paid-only via direct /api/pricing check: 49 models, all paid (fixed-price quota_type=1 or per-token model_ratio>0); zero free-price entries. Top-up is via third-party redemption codes.

TheOldLLM (theoldllm.vercel.app) is a free, browser-based multi-model AI workspace for comparing leading models, chat, file/image analysis, web research, and study tools. Standard models need no account; frontier-tier models require a verified email, and rate limits apply.

Free chat interface; access/rate limits vary by account status, no USD credit.