AssemblyAI is a speech-to-text and audio AI platform offering pre-recorded and realtime transcription (Universal models) with speaker diarization, summarization, and language detection across 99+ languages. Pay-as-you-go API with no commitments.

Signup grants ~5 minutes of free transcription (documented free tier); valued at Universal-3.5 Pro rate $0.21/hr ≈ $0.0175, or ~$0.05 at custom/legacy rates; pricing page documents free start but exact free minutes not restated on current page, so estimate kept conservative.

GitHub Copilot - AI coding assistant across VS Code, CLI, web and mobile; Free/Pro/Pro+/Max plans with monthly AI credits (1 credit = USD 0.01); model choice across OpenAI, Anthropic, Google and Moonshot; 1M context supported in VS Code and CLI.

1 credit = USD 0.01; premium model usage consumes credits at per-model rates.

GitHub Copilot enterprise plans (Business/Enterprise) - AI coding assistant with AI-credit allowances (1,900 / 3,900 credits per user/mo), model choice across OpenAI, Anthropic, Google and select Moonshot models; Enterprise credits are org-pooled; overage at USD 0.01/credit. Copilot is not currently available for self-hosted GitHub Enterprise Server.

1 AI credit = USD 0.01; overage billed at USD 0.01 per credit.

Notion AI (notion.so) embeds multi-model LLM access into the Notion workspace (Notion Agent, AI blocks, Enterprise Search, Research Mode). Model vendors are not individually named publicly (FAQ states Notion charges tokens at each provider's published rates, no markup), so no catalog models are linked. Free/Plus plans get only a limited trial of complimentary AI responses; full Notion AI requires Business/Enterprise with a usage allowance, and premium models spend Notion credits ($10 per 1,000 monthly credits). This route is an unofficial web integration using the token_v2 cookie from app.notion.com.

Notion credits: $10 per 1,000 monthly Notion credits (notion.com/pricing) -> $0.01/credit.

Qoder - AI coding IDE (Agent/Quest modes) with credit-based plans; Free tier (2-week Pro trial with 300 credits, limited completions/NES, BYOK); Pro/Pro+/Ultra; Credit Pack; per-model cost varies by tier multiplier (Auto approx 1.0x, Ultimate approx 1.6x, Performance approx 1.1x, Efficient approx 0.3x now free for paid, Lite free); context options 200K/400K/1M.

Plan quota approx subscription value (approx USD 0.01/credit). qoder.com/pricing headline shows Pro at 4,000 credits incl. a 2,000 first-purchase bonus; docs base is 2,000 credits/mo.

Inner AI (innerai.com / app.innerai.com) is a multi-model AI productivity app (chat, image/audio/slide generation, custom assistants). Access via this route is an unofficial web-cookie integration (token cookie + account email). Official pricing page documents Lite and Pro plans with GPT-5 Mini/DeepSeek 3.1 +5 fast models, GPT-5/Claude 4.6 Sonnet +5 advanced models, and credit-based generation (Nano Banana, ElevenLabs, Gamma +25). Third-party sources report a 7-day free trial/money-back guarantee rather than a perpetual free tier.

Derived: Pro plan ($15/mo) includes 10,000 monthly generation credits (pt innerai.com/pricing) -> ~$0.0015/credit.

Poe (poe.com, by Quora) is a commercial multi-model chat platform: one subscription buys compute points spent across thousands of official and community bots (OpenAI, Anthropic, Google, xAI, Moonshot, image/video models). Free tier gives a small daily point allowance (~300/day per third-party review); the paid ladder runs $4.99-$249.99/month (official plans page: from $4.17/mo billed annually, up to 8.3M points/mo). This route is an unofficial web-cookie integration (p-b cookie).

Derived: $19.99 plan = 660,000 points/mo (third-party) -> ~$0.0000303/point. Point cost per model varies and is set per-bot.

360 AI (360智脑) is a Chinese LLM API provider by 360 Group, offering conversational models with support for multiple file formats and LlamaIndex compatibility. Access is managed through a dashboard-generated API key, primarily serving enterprise and developer needs in China.

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

9Router is a specialized AI API router designed for smart fallback and cost optimization, allowing users to pool their own subscription keys. It emphasizes 'unlimited free AI coding' by routing through free models or maximizing existing subscriptions via a local proxy or VPS.

9Router is free open-source self-hosted router software (never charges); 9router.xunleiyk.com is a hosted instance ('AI Infrastructure Management' panel, auth-gated). No credits/billing tiers apply.

Open-source local AI router (npm package '9router', MIT license, Next.js, by decolua). Connects CLI coding tools (Claude Code, Codex, Cursor, Gemini CLI, Cline, OpenCode, Antigravity, Copilot and any OpenAI/Claude-compatible client) to 40+ AI providers and 100+ models through a local OpenAI/Claude-compatible endpoint. Features: RTK token compression (20-40% savings on tool results), auto-fallback (subscription -> cheap -> free), multi-account round-robin, web dashboard. Self-hosted; users bring their own upstream accounts/keys. Implementation inspired by CLIProxyAPI.

Software is free (MIT); it routes through user-provided upstream accounts, no credits or prices from the router itself.

AI Horde (Stable Horde) is a free, volunteer-run, community-powered network of donated GPUs that generates AI images (Stable Diffusion, SDXL, Flux and other diffusion models) and text. Anonymous access is available with the shared key 0000000000 at lowest priority; registering for kudos raises priority.

Free kudos-based system; no quantified monthly USD credit.

AI-ROUTER is an enterprise-focused AI API gateway providing unified access to OpenAI, Claude, and Gemini models. It uses a unique 'fuel package' and subscription model, offering managed quotas with daily, weekly, and monthly limits for intensive development and team workflows.

Paid ChatGPT relay with time-boxed packages only: daily $5.40-$35.10/day, weekly $26.10-$179.10 (Alipay/WeChat/crypto/Stripe). No free tier or signup credit found on site or in searches.

AI/ML API is a major AI model aggregator providing unified access to 1000+ models from OpenAI, Anthropic, Google, DeepSeek, and more. It offers a single API key for LLM, image, voice, and video models with a focus on production-ready pay-as-you-go access.

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

AINative Studio specializes in AI agent infrastructure, providing multimodal APIs, persistent agent memory, and MCP server hosting. It offers tiered subscription plans that include 'ZeroTime' credits for agentic workflows and specialized model access.

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

Adapta One (adapta.org / agent.adapta.one) — Brazilian multi-model AI subscription ('maior ecossistema de IA generativa do Brasil') bundling 15+ chat and image models (GPT, Claude, Gemini, DeepSeek, Qwen, Llama, Grok, Kimi, Flux, Nano Banana, etc.) in one chat with documents/spreadsheet analysis. Unofficial browser/cookie integration.

Flat R$99/user/month (≈US$18) with unlimited access to the bundled models; annual option R$1,428/year (12× R$119 with 2+ seats).

Adobe Firefly (firefly.adobe.com) — Adobe's web image/video/audio generation suite (Firefly Image Model 4 plus partner models: Nano Banana, Flux, Veo, Kling, Runway). Unofficial browser/cookie integration; output is generated media, not LLM chat.

Plans bundle monthly generative credits (2,000/4,000/10,000/50,000) instead of pay-as-you-go tokens.

Aiaiai001 (Longcheng AI Toolbox) is a Chinese commercial AI API relay aggregating frontier models via a New-API based backend. It provides an OpenAI-compatible endpoint and requires quota purchases through an external shop (pay.ldxp.cn).

Official FAQ directs users to buy quota packages via pay.ldxp.cn/shop/aiaiai001; freeairouter review says '付费中转，非免费' (paid relay, not free) with free quota unclear/none observed. Paid relay, no public free tier.

All API Hub is an open-source browser extension and account manager for the New-API/Sub2API ecosystem. It provides a unified dashboard for tracking balances, usage, and auto-checking across multiple relay providers, rather than serving as an API endpoint itself.

Free open-source tool that grants no model quota itself; its docs only teach users how to farm check-in/free allowances on other relays. No free API value is provided here.

Amazon Q Developer — AWS's agentic coding assistant (IDE plugins, CLI, AWS console, chat). Perpetual Free Tier (50 agentic chat interactions/month, 1,000 LOC code-transform/month for Builder ID users) plus a Pro tier (~$19/user/mo) with expanded limits and pay-per-use overage ($0.003/LOC beyond the 4,000 LOC allocation). Authenticates via AWS IAM / Builder ID. IDE plugins enter end-of-support April 30, 2027.

Pro tier includes monthly LOC/chat allocations; overage billed per LOC ($0.003). No credit-unit system.

Ant Ling (by inclusionAI) provides an OpenAI-compatible API for its proprietary Ling model family. It supports high-speed inference and is designed to integrate seamlessly with standard SDKs by switching the base URL, serving both developer and enterprise needs.

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

Claude Code — Anthropic's agentic coding CLI/IDE tool. Bundled with Claude Pro ($20/mo) and Max (5x/20x) subscriptions; NOT available on the free Claude plan. Current model family: Fable, Opus, Sonnet, Haiku (200k context window on the plans page). Authenticates via claude.ai/Anthropic OAuth. Official.

Usage-limit based (weekly/5-hour windows), not per-token. Pro/Max can purchase usage credits for overage.

OAuth access — sign-in with your existing account. Google Antigravity 43 models tracked (via OpenRouter catalog).

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

Antigravity CLI (agy) — the terminal TUI for Google Antigravity 2.0, replacing Gemini CLI. Shares the same agent backend as the Antigravity IDE (incl. Claude models). Authenticates via Google OAuth. Free 'Individual' tier with weekly rate limits; higher limits via Google AI Pro/Ultra plans. No bring-your-own-key support.

Overage billed via purchased Google AI credits at Gemini Enterprise Agent Platform consumption pricing (not per-token fixed).

Api.airforce is a unified AI model aggregator reselling access to 100+ models from Anthropic, OpenAI, and xAI. It offers a large selection of free models (including Grok-3 and Claude 3.7) alongside paid subscription tiers for higher throughput.

55 free tier models including Grok-3, Claude 3.7, Qwen3, Kimi-K2, Gemini 2.5 Flash, DeepSeek-V3