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Nscale is a European AI hyperscaler providing Serverless Inference for large-scale AI deployment. It offers an OpenAI-compatible API to leading open models like Llama and DeepSeek. New users receive a $5 signup credit to start prototyping without initial cost.

New users get a one-time $5 free credit to explore the models; after that you add a card to buy more. The core is pay-as-you-go (e.g. GPT-OSS 120B ~$0.1 in / $0.4 out per 1M tokens), with no rate limits and no cold starts.

Mistral AI's official platform (La Plateforme) provides access to their open and proprietary models via an OpenAI-compatible API. It features a free 'Experiment' tier for developers and pay-as-you-go pricing for production workloads.

Community reported approximate monthly value of the Experiment free tier for developers.

token.sensenova.cn is the official Token Plan for SenseTime's SenseNova multimodal AI platform. During its public beta, it offers generous free quotas for models like SenseNova 6.8 Flash Lite and U1 Fast, suitable for complex office workflows.

Free public beta (extended to end of July): 1,500 calls/5h per model (verified: 60k points/5h on token-plan page); ~7,200 calls/day ~ $200/mo equivalent at ~1K tokens/call. Phone signup, up to 20 API keys.

The xAI Console is the official developer interface for Elon Musk's Grok models. It offers a usage-based API with prepaid credits, prioritizing performance and direct access to their flagship large language models.

Community reported trial credit amount for new developer accounts.

ModelScope (modelscope.cn), backed by Alibaba Cloud, is an open-source model community and inference platform. It provides a free API tier allowing users to make up to 2,000 OpenAI-compatible calls per day across a wide range of open-source models (Qwen, DeepSeek, GLM).

2,000 API-Inference calls/day per user (verified, aggregated across models; ~200-500/day per model), resets UTC+8 00:00, 429 when exceeded; requires Alibaba Cloud binding. ~$60/mo equivalent at ~1K tokens/call.

Groq Cloud provides ultra-fast LLM inference using its proprietary LPU (Language Processing Unit) hardware. It offers an OpenAI-compatible API with a substantial free tier for developers to test and build applications at scale.

Community reported approximate monthly value of free tier rate limits for individual developers.

Pioneer AI, by Fastino Labs, provides an inference API for specialized tasks like data extraction and classification. It offers seat-based subscriptions with included platform credits and priority support.

$75 free usage credits — no credit card required

Baseten is a robust model inference and deployment platform that enables enterprises to run custom and open-weights models in production. It offers high scalability, dedicated GPU infrastructure, and a developer-friendly API for deploying models from a comprehensive library.

New workspaces get $30 in trial credits billed by compute time (confirmed by pricing FAQ and 2026 credit trackers); converts to pay-as-you-go once spent. Startup program (up to $25K) is separate.

Cerebras Inference is powered by wafer-scale WSE chips, offering world-leading inference speeds. It provides an OpenAI-compatible API with $5 in free credits and generous rate limits for developers. Details were checked against the provider's own page at www.cerebras.ai.

Free dev tier: 1M tokens/day (daily reset, no card, ~30 RPM / 60K TPM; some report 5 RPM) → ≈$30/mo blended at $1/1M; beyond that paid PAYG (developer tier from $10).

Cerebras Inference offers ultra-fast AI inference powered by its Wafer-Scale Engine (WSE-3) technology, achieving record-breaking speeds up to 3000 tokens/s. The official API is OpenAI-compatible and features a generous free tier alongside professional pay-as-you-go access.

Free tier ≈1M tokens/day (resets UTC 00:00, no card, no waitlist) → ≈$30/mo blended at $1/1M; 8K context cap; RPM reported 5–30 by different sources. Paid dev tier from $10.

Z.ai is Zhipu AI's international developer platform, offering access to the GLM (General Language Model) family. It provides a high-performance alternative to Western models, with the GLM-Flash series offered permanently for free to developers to encourage global adoption of its flagship reasoning models.

GLM Flash models (4.7/4.5 text, 4.6V vision) listed $0 on official pricing — ongoing free models, not trial credits; ~1 QPS and ~1K calls/day (third-party, unofficial) → ≈$30/mo blended. Flagship GLM-5.x paid.

Inference.net (formerly Kuzco) is a distributed GPU inference network offering a unified OpenAI-compatible API for open-source models. It specializes in low-cost deployment of Llama 3.1 models and offers substantial initial credits ($1 + $25 for surveys) for new developers.

~$1 credit on signup + $25 more after replying to an email survey (verified) = ~$26 total; free tier ~30 req/min (paid ~250/min); converts to PAYG after credits are spent.

xAI (founded by Elon Musk) offers the official API for the Grok series of LLMs. Known for leading benchmarks in coding and reasoning, the Grok-4.6 flagship model is available via an OpenAI-compatible API, featuring low-latency inference and high agentic tool-calling capabilities.

No permanent free tier; ~$25 promo credit on signup (30-day expiry, varies by region/promotion). $150/mo data-sharing credits still listed by 2026 guides despite mid-2025 end reports — rely on what the console shows.

Alibaba Cloud Model Studio (Bailian) is the official international platform for Qwen and other foundation models. It offers 1 million free tokens per model for new users and a 50% discount on batch inference.

New users: free token quota per model (~1M each, tens of millions cumulative; campaign cites 70M+), 90-day validity, select regions (e.g. Singapore/International) → ≈$20 blended at Qwen list prices; then PAYG.

Google AI Studio (ai.google.dev) is the official developer platform for Google's Gemini model family. It offers both a generous free tier for prototyping and a paid production tier with higher rate limits, context caching, and data privacy guarantees.

Estimated based on high free-tier rate limits (RPD) vs paid input/output rates for equivalent usage.

Lightning AI (LitAI) provides a unified gateway to frontier models through an OpenAI-compatible API. New users receive 40 million free tokens (approx. $15 in credits) to test models like Claude, GPT, and Gemini. Usage beyond the initial credit is billed as pay-as-you-go.

~30M free tokens per user per month (~15 credits = $15 value), no card required; credits refresh monthly and expire if unused; plus 1 free 4-CPU Studio and 10GB Drive.

NLP Cloud is a commercial provider hosting various open-model APIs (Llama, Mixtral, Dolphin) with both pay-as-you-go and subscription options. It grants new users $15 in free credit upon phone verification.

Pay-As-You-Go plan auto-grants ~$15 free credit at signup (phone verification required); large models (GPT-OSS 120B, Llama 3.1 405B/3.3 70B) ~$0.0018/1K tokens; PAYG after credit is used.

StepFun Open Platform is the official developer platform of a Chinese AI unicorn, serving its Step-series multimodal models via an OpenAI-compatible API. It supports text, vision, and end-to-end speech models with tiered rate limits and a credits-based free allowance for new accounts.

Starter ~500K free tokens per model; ~2M tokens/day after activating collaboration-reward program (~$15/mo at StepFun's own ~$0.2-0.6/1M pricing); Step Plan 15-day trial extendable via referrals. Now platform.stepfun.ai.

AI21 Labs is an established LLM vendor known for its Jamba model family. The developer platform (api.ai21.com) offers OpenAI-style endpoints for its high-performance models, with a trial credit for new accounts to explore its capabilities.

$10 trial credit valid for 3 months for new accounts.

Upstage Console provides an OpenAI-compatible API for their high-performance Solar models. It features a developer-friendly $10 signup credit and commitment-based tiers for businesses requiring higher rate limits and support.

One-time $10 credit valid for 3 months for new signups.

Inception Labs offers a cloud inference platform for its in-house diffusion-based LLMs, such as Mercury 2 and Mercury Coder. Designed for extreme efficiency, it provides an OpenAI-compatible API that significantly undercuts GPU-based inference costs while maintaining high reasoning quality.

Free plan ≈10M tokens, officially described as ~$7–10 of credit (low end counted), no card; self-serve key at platform.inceptionlabs.ai; then PAYG (Mercury 2 ~$0.25/1M in, $0.75–1.00/1M out).

Ollama Cloud is the official managed inference platform for the Ollama ecosystem. It allows developers to deploy and call popular open-weights models (Llama, DeepSeek, Qwen) via a unified OpenAI-compatible API, providing a bridge between local development and cloud scale.

Free $0 cloud tier: 1 concurrent cloud model, 5h session limits / weekly limits; users measured ~250K tokens before pause → ≈$7/mo blended. Pro $20/mo and Max $100/mo are subscriptions, not PAYG.

InternLM (Shanghai AI Laboratory) provides an open platform with an OpenAI-compatible API. It offers a monthly free token allowance for its InternVL and long-thinking reasoning models. Details were checked against the provider's own page at internlm.intern-ai.org.cn.

Community users: ~1M input + 3M output tokens free per month (~10 RPM, keys valid 6 months) ≈ $5/mo at $0.5 in / $1.5 out per 1M; monthly usage visible in console under API Usage.

Modal (modal.com) is a serverless compute platform optimized for AI infrastructure. Rather than a per-token API, it bills by the GPU-second, allowing developers to deploy custom models. A 'Starter' tier provides $30/month in free compute credits.

~$5/month free credits on signup; ~$30/month after adding a payment method (a card on file is required to use Modal); billed by compute-second. Value shown is the no-card free tier.