Nube Cloud is a specialized inference provider focused on cutting costs for open-source models like GLM, DeepSeek, and Qwen. It offers a zero-data-retention policy and deeply optimized routing for lightning-fast latency.

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

OCI Generative AI is Oracle's enterprise-grade inference service hosting Llama and Cohere models. It provides on-demand and dedicated hosting with native integration into the Oracle Cloud ecosystem. Details were checked against the provider's own page at www.oracle.com.

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

OfoxAI is an enterprise AI gateway aggregating 100+ models from OpenAI, Anthropic, Google, and more. It offers official provider pricing with a 0% platform fee and includes built-in budget controls and audit logs.

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

web search provider (API). Same API key as Ollama Cloud (from ollama.com/settings/keys) 1 model tracked (curated from provider docs).

A free tier is available; the exact credit value is not quantified.

OnAllways (llm.onallways.top) is a 'subscription-to-API' relay that pools various AI subscription accounts (Claude, GPT) and redistributes them as API keys. It is anonymously run and targets users looking for low-cost access to restricted models.

Unknown: the site's subtitle is 'Subscription to API Conversion Platform', with payment/affiliate/risk-control enabled and traffic funneled to third-party card shop catfk.com; no clear public persistent free quota is visible.

OpenAI is the developer of GPT-4o, o1, and other leading LLMs. It offers a usage-based API for developers with tiered processing (Fast/Batch) and extensive multimodal capabilities including audio and video generation.

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

OAuth access — sign-in with your existing account. OpenAI Codex (CLI) 93 models tracked (via OpenRouter catalog).

A free tier is available; the exact credit value is not quantified.

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.

OpenAdapter is an AI model API providing access to models like DeepSeek, Qwen, and GLM through an OpenAI-compatible endpoint. It focuses on easy integration by allowing standard clients to switch base URLs.

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

no-auth access — no key or sign-in required. No API key required — uses OpenCode's public free endpoint. This entry is an access surface/agent — it routes to third-party models rather than hosting its own.

A free tier is available; the exact credit value is not quantified.

OpenCode Zen is the model gateway from the OpenCode team that serves a curated, tested set of coding models. It includes a set of free models (Big Pickle, MiMo-V2.5 Free, Ling 3.0 Flash Fin Free, Nemotron 3 Ultra Free, Nemotron 3.5 Lightning Free, Muse Spark 1.3 Contributor Free) plus pay-as-you-go paid models, reachable at https://opencode.ai/zen/v1.

Free models are genuinely $0 per token (documented); no separate monthly USD credit.

OpenVecta provides an AI model API with an OpenAI-compatible endpoint. It focuses on simplicity and ease of use, with reports of a free tier or trial credits available for new users. Details were checked against the provider's own page at openvecta.com.

Free credits on signup for OpenAI-compatible inference across LLMs, embeddings, and reasoning models

OAuth access — sign-in with your existing account. Sign in with your Openference account to route requests through api.openference.com. An active plan is required for inference — OAuth may authenticate but return 402 without one. This entry is an access surface/agent — it routes to third-party models rather than hosting its own.

A free tier is available; the exact credit value is not quantified.

OrcaRouter is an LLM gateway offering zero token markup and adaptive routing across 200+ models. It is OpenAI-compatible and supports both pay-as-you-go and subscription plans with a handful of free-tier models.

Free-forever 'Hacker' plan: only $0-priced -free models and orcarouter/free endpoint are genuinely free, limited by request rate; probe showed $0 auto-grant. '1B free tokens'/voucher promos lack verifiable terms.

PLaMo is a Japanese LLM platform developing the PLaMo 3.0 Prime flagship model. It offers an OpenAI-compatible API optimized for high-performance Japanese language processing at a very low cost. Details were checked against the provider's own page at plamo.preferredai.jp.

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

Perplexity Web (perplexity.ai) is an AI answer/search engine. Free plan gets the 'Best' model + limited Pro Searches; Pro ($20/mo, $200/yr) and Max ($200/mo, $2000/yr) unlock manual selection of frontier models, Deep Research, Labs, and Perplexity Computer. Official model table (help center, snapshot 2026-09) lists Sonar 2, GPT-5.6 Terra, GPT-5.6 Sol (Max), Gemini 3.7 Flash, Claude Sonnet 5, Claude Opus 5 (Max), Kimi K3, GLM 5.3, Grok 4.6, Nemotron 3 Ultra. This route is an unofficial web-cookie integration (__Secure-next-auth.session-token).

Max includes 35,000 bonus + 10,000 monthly credits (perplexity.ai/hub/pricing); no published USD conversion. The separate Perplexity API is pay-per-token (not this route).

web search provider (API). Same API key as Perplexity (pplx-...) 5 models tracked (via OpenRouter catalog).

A free tier is available; the exact credit value is not quantified.

web-cookie access — wraps the provider web app (unofficial). Paste your __Secure-next-auth.session-token cookie value from perplexity.ai 5 models tracked (via OpenRouter catalog).

A free tier is available; the exact credit value is not quantified.

Play.ht is an AI text-to-speech platform with 900+ ultra-realistic voices, 32+ languages, voice cloning, and a real-time voice generation API. Plans: Free (1,000 chars/mo, no API), Creator ($31.20/mo billed annually, ~3M chars/yr), Unlimited ($99/mo regular; API add-on billed separately), Enterprise custom. Note: the official pricing page is JS-rendered and could not be fully captured; details sourced from third-party pricing guides.

Free tier = 1,000 chars/month (third-party guide; official page not captured); too small to value reliably against current API rates, and sources conflict on exact current pricing — set to null rather than guess.

Playhop is a web-based gaming platform offering a variety of casual games. It does not appear to provide a public AI model API or LLM routing service for developers. Details were checked against the provider's own page at playhop.com.

Not an AI API - Playhop is a free online browser-games portal (20,000+ browser games, no login). Mis-listed in this directory; no AI API or free credits apply.

web-cookie access — wraps the provider web app (unofficial). Paste your p-b cookie value from poe.com (DevTools → Application → Cookies → p-b) This entry is an access surface/agent — it routes to third-party models rather than hosting its own.

A free tier is available; the exact credit value is not quantified.

Poixe AI is a commercial AI API router and aggregator that provides a unified interface for multiple LLM upstreams. It features model-group specific rate limits and a dashboard for API key management, targeting developers seeking simplified access to global and Chinese models.

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

Poolside develops foundation models optimized for software engineering. Their API provides access to the Laguna series models (Laguna S, Laguna XS) with an emphasis on code generation and technical reasoning.

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

Predibase is an enterprise-grade low-code platform for fine-tuning and serving small language models. As of mid-2026, evidence suggests their managed public serving API has been discontinued or moved behind a private VPC-only model.

No free tier — the source marks this service as deprecated/discontinued.