Runway bills generative video, image and audio in credits, with consumption rates published per model. Free includes 125 one-time credits that do not expire plus 5GB storage; Standard is $12/month billed annually for 625 credits/month, Pro $28/month for 2,250 and Max $76/month for 9,500 with up to one month of rollover. Gen-4.5 costs 60 credits per 5-second clip, Gen-4 Image 8 credits per 1080p image and Gen-4 Image Turbo 2 credits. The developer API uses usage tiers 1-5 with monthly spend caps from $100 to $100,000, where tier 2 unlocks immediately after $50 purchased.

The Free plan is documented as 125 one-time credits that do not expire plus 5GB storage (runwayml.com/pricing); credits have no published USD conversion, so no dollar value is set (checked 2026-09-16).

SEA-LION (Southeast Asian Languages In One Network) is a suite of LLMs specifically optimized for Southeast Asian languages and cultural contexts. The API platform allows developers to integrate these regional models into localized applications with easy Google-auth signup.

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

SearXNG: free, open-source, self-hosted metasearch engine aggregating up to 264 search backends with a JSON Search API (format=json). No vendor, no API key required (keyless on self-hosted or public instances), no pricing — cost is only your hosting. Rate limiting/bot detection configured per instance.

Fully free (open source); no credits or vendor pricing to quantify.

Segmind is a serverless AI platform providing access to a wide range of models via API, including image generation (Stable Diffusion, Flux), LLMs, and more. It offers a pay-as-you-go model with monthly credits included in paid plans. Access is configured via an API key created in the dashboard.

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

Speka is a unified AI API gateway providing access to frontier models (DeepSeek, Nemotron, Llama) via a single API key. It uses a subscription model with monthly usage allowances and standard per-token overage rates.

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

StepFun's open platform exposes Step 3.7 Flash and Step 3.5 Flash reasoning models, a vision model and a full speech stack, priced per 1M tokens, per hour of audio or per 10,000 characters. Step 3.7 Flash is 1.35 CNY per 1M input tokens on a cache miss, 0.27 CNY cached input and 8.1 CNY output; Step 3.5 Flash is 0.7 / 0.14 / 2.1 CNY, and four audio preview models are marked limited-time free in the price table. Rate limits are tiered by cumulative top-up, from V0 with 5 concurrent requests, 10 RPM and 5,000,000 TPM at zero spend to V5 with 200,000 RPM at 10,000 CNY.

No numeric free grant is published on official pages (checked 2026-09-16); the billing doc confirms a gift-balance account is drawn down before paid balance but states no amount, while stepaudio-3-realtime-preview, stepaudio-3-chat-preview, stepaudio-3-gen-preview and stepaudio-3-music-preview are listed as limited-time free in the price table.

Suno is a leading generative AI platform for music and audio. It offers subscription-based access to its music generation models (v3.5, v4) with daily or monthly credit allowances. Credits are used to generate songs, extend tracks, and extract stems.

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

Shawn AI (肖恩AI) is a community-driven API relay station aimed at roleplay and tavern users. It aggregates hundreds of models including Claude 4.7 and GPT-5.5, offering free daily points and signing bonuses. It features a transparent point-deduction system and recovery for failed generations.

Uses a 'points' system (5000 on signup, 1000-3000 daily check-in) which does not have a fixed USD conversion rate.

Tencent AI Studio (aistudio.tencent.com, branded Hy AI Studio and built on Tencent Hunyuan) is Tencent's Chinese-language console for chatting with Hunyuan models, trying multimodal capabilities and managing API access. Tencent Cloud's official Hunyuan billing page states that after completing real-name verification, first activation issues a one-time free call allowance as a free resource pack: 1,000,000 tokens shared across Hunyuan-a13b, Hunyuan-role-latest, Hunyuan-translation, Hunyuan-translation-lite, Tencent HY Vision 1.5 Instruct, Hunyuan-turbos-vision, Hunyuan-t1-vision and Hunyuan-turbos-vision-video, plus a separate 1,000,000 tokens for Hunyuan-embedding, both valid one year. Postpaid list prices start at 0.5 yuan input and 2 yuan output per million tokens for Hunyuan-a13b.

Free grant is a one-time 1,000,000-token resource pack shared across the listed Hunyuan text and vision models, plus 1,000,000 tokens for Hunyuan-embedding, valid 1 year, stated in Tencent Cloud's Hunyuan billing documentation.

Tencent Hunyuan (混元) is a series of large-scale AI models integrated with the Tencent ecosystem (WeChat, Tencent Cloud). It offers strong Chinese language support and multimodal capabilities, including vision and code generation.

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

Tencent Yuanbao (yuanbao.tencent.com) — Tencent's free consumer AI assistant built on the Hunyuan (混元) family; current version serves Hunyuan Hy4 preview with upgraded Agent capabilities, plus a DeepSeek R1 inference option. Unofficial browser/cookie integration.

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

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.

TheB.AI is a versatile AI model aggregator and chatbot platform providing access to multiple frontier models (GPT-4, Claude 3, Gemini) via a unified API. It features a pay-as-you-go model and an OpenAI-compatible gateway.

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

TinyFish provides web infrastructure for AI agents, offering Search, Fetch, Browser, and Web Agent APIs. It is designed to navigate dynamic pages, bypass bot detections, and extract structured data from any URL. Search and Fetch APIs are free on every plan.

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

OpenTyphoon is a Thai-focused AI model platform by SCB 10X. It provides free access to models like Typhoon 2.5 via its hosted API at opentyphoon.ai. Production-grade access is offered through partners like Together AI and Float16.

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

Udio is an AI music generation platform that allows users to create high-fidelity audio tracks from text descriptions. It offers both a free tier with daily credits and subscription plans with higher quotas and advanced features (Voice Control, stem extraction).

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

UncloseAI (uncloseai.com) is a free, public-domain, open-source AI service offering OpenAI-compatible, drop-in endpoints with no cost: hermes.ai.unturf.com/v1 (general chat), qwen.ai.unturf.com/v1 (coding), and speech.ai.unturf.com/v1 (TTS). It currently serves Lorbus/Qwen3.6-27B-int4-AutoRound.

Completely free; no credit system.

UniExpand (Knowledge PRO API) is a unified AI application infrastructure provider. It offers a powerful API management platform to connect various frontier LLMs, focusing on enterprise-ready security, millisecond response times, and multi-region deployment for global access.

Unknown (open registration, priced in CNY with Stripe payment; no clear free giveaway observed).

UnoRouter is a unified AI API platform providing access to hundreds of models through a single intelligent endpoint. It is fully OpenAI-compatible and supports various clients including coding agents, character chat, and CLI tools. Features both pay-as-you-go and subscription plans with credit bonuses.

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

web-cookie access — wraps the provider web app (unofficial). Paste your session cookie from venice.ai (DevTools → Application → Cookies) 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.

VEO AI Free (veoaifree.com) is a free, no-signup web tool that generates videos using Google Veo (claims Veo 2.0/3.0/3.1) plus an image generator. It advertises unlimited free use but is an unofficial third-party site (share-to-unlock, ads, and a $14/mo premium plan); the dataset reports ~6 requests/hour/IP.

Free no-signup video generation; premium $14/mo plan exists; no quantified free credit.

Void AI is an AI API aggregator compatible with the OpenAI SDK. It uses a credit-based billing system where model costs are calculated using multipliers (e.g., GPT-5.1 is 0.75, GPT-4o is 1.25). Offers both flat-rate plans and usage-based top-ups.

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

Volcengine is ByteDance's enterprise cloud platform. Its Ark (Huoshan Fangzhou) platform provides access to the Doubao (Doubao) model family and other high-performance LLMs. Supports OpenAI-compatible API calls and various billing plans including token-based monthly packages.

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

Weights & Biases Serverless Inference gives API and playground access to open-source LLMs hosted on CoreWeave, using an existing W&B account and no separate provider keys, with support for bringing your own LoRA weights for fine-tuned models. Token rates are listed per 1M tokens on the W&B pricing page: Meta Llama 3.1 8B at $0.22 input / $0.22 output, Meta Llama 3.3 70B at $0.71 / $0.71, OpenAI GPT OSS 120B at $0.03 / $0.17, NVIDIA Nemotron 3.5 Lightning at $0.07 / $0.20 with a $0.04 cache-hit rate, and DeepSeek V4-Pro at $1.15 / $2.55 with a $0.20 cache-hit rate. Inference spend is separate from platform subscriptions and can be capped with a monthly W&B Inference budget.

Weights & Biases states only that Inference includes 'Free credits for a limited time' on the Free plan and a $5/mo credit on Pro, with no dollar amount or expiry published for the free grant (checked 2026-09-16).