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Discover top AI model providers offering free API tiers, developer credits, and instant key access.
AMD Radeon Cloud
AMD 官方面向开发者推出的 Radeon Cloud Token Factory 算力平台，提供开箱即用的免配置 AI 模型 API（涵盖 DeepSeek V4 Flash 1M、Qwen 3.8 Flash、MiniCPM 等），原生兼容 OpenAI 与 Anthropic 双协议。
NVIDIA NIM
NVIDIA NIM (Inference Microservices) provides optimized cloud and self-hosted API endpoints for enterprise and open-source models with 1,000 free inference credits on registration.
Zhipu AI
智谱 AI 开放平台（BigModel），提供 GLM-5.3-Flash、GLM-4 等全系列前沿大模型与 GLM Coding Plan 开发者订阅。
Empero
Empero is an independent AI research lab based in Germany, dedicated to advancing open-weights models. It provides a 100% free, OpenAI-compatible community endpoint for models like GLM-5.3-Flash with no registration or API key required.
GMI Cloud
GMI Cloud 是专为高性能 AI 与 GPU 算力打造的云服务平台。提供 MiniMax M3、Speech 2.8 与 Music 3.0 等核心旗舰模型的 0 元直接 API 调用，免绑卡、免预充值。
OpenCode Go
OpenCode Go 是专为 Coding Agent 和高频开发者打造的超高性价比订阅计划（Coding Plan）。首月仅 $5（续费 $10/月），提供每月 $60 基础额度池、Hy3 独享 $480/月 算力、GPT-5.6 Sol 5 折以及 Muse Spark 1.2 Contributor 近乎无限额度，量大管饱，可直接生成 API Key 供 Cursor、Claude Code、Aider 等各种工具调用。
DeepSeek
DeepSeek 官方开放平台，提供业内领先的高性价比大模型与代码推理 API，原生支持 OpenAI 接口协议与超低成本 Context Caching。
Higgsfield
Higgsfield 是 BytePlus 官方合作的一站式 AI 视频与图像生成平台，提供 Seedance、Kling 等 100+ 生成模型。
OpenCode Zen
OpenCode Zen 是专为开发者与 Coding Agent 打造的 Pay-as-you-go AI 网关。账户完成首次充值激活后，即可免费调用包括 Meta Muse Spark 1.2、Nemotron 3 Ultra、DeepSeek V4 Flash 等多款顶尖限时免费模型。
Fish Audio
Fish Audio provides multilingual text-to-speech and reusable voice cloning APIs. S2.1 Pro supports 83 languages, automatic language detection, and natural-language emotion cues. Create an account: https://fish.audio/?aff=QNLX47TF37QU6
GitHub Models
GitHub Models offers free, rate-limited API access to selected OpenAI, DeepSeek, and open models through a GitHub token, with no separate provider account needed.
Google AI Studio
Google AI Studio provides free Gemini API access with generous free-tier rate limits, strong multimodal support, and browser-based key creation for quick prototyping.
Cloudflare Workers AI
Cloudflare's serverless GPU-powered inference platform, offering a high daily free tier for various open-source models.
OpenRouter
A unified API for many LLMs. They offer several models completely for free.
Vercel AI Gateway
Vercel AI Gateway acts as a proxy to various AI providers. It offers a generous $5 monthly credit for accessing premium models without bringing your own key (BYOK).
Xiaomi
Xiaomi Mimo platform offering robust AI models and currently featuring free TTS capabilities.