Xingtu AI (api.xstx.info) is a third-party LLM aggregation relay that was previously marketed for free Claude and Codex access. Community reports and service status trackers indicate the service has been down for several months and may have effectively 'soft-runaway', transitioning to a new platform named Reclaude.

No public free-tier information found (researched 2026-08-28). Source note: Previously attracted users with 'free Claude/Codex'; its companion chat client chat.xstx.info had a shared daily 100-CNY quota; the API side uses CNY pricing with Stripe top-up (~$8/unit). Current free availability is doubtf

Xiaolangwangyue (integrated with GetToken.dev) is an AI API aggregator platform offering highly discounted balance top-up plans and subscriptions for ChatGPT (GPT-6/5.6/5.4) and other models. It follows a 1:1 official rate deduction from a prepaid USD balance bought with CNY at significant discounts.

GetToken is a paid Codex API reseller (ChatGPT Pro 20x resources; balance plans from ¥0.15 per $1). 'First recharge offer' is a paid promo; dashboard has a 'Free trial quota' field but no public free-credit offer.

mimo.xiaomi.com is Xiaomi's MiMo model site, listing MiMo-V2.5-Pro, MiMo-V2.5, MiMo-V2.5-TTS and MiMo-V2.5-ASR alongside a web demo, API access, papers and blog posts. Paid access runs through the MiMo Platform Token Plan, priced in USD per month: Lite $5.28 (list $6), Standard $14.08 ($16), Pro $44 ($50) and Max $88 ($100), covering 49.2B to 984B credits with full V2.5 text, multimodal and speech model access and free TTS models as a limited-time offer. MiMo Code, Xiaomi's coding agent, is documented as startable with no login ('无需登录，开箱即用') and its provider doc points to an OpenAI-compatible endpoint at api.xiaomimimo.com/v1 with an Anthropic-compatible option at /anthropic.

No free credit grant stated: MiMo Code is documented as usable free without login and Token Plans include 'Free TTS Models - Limited time offer', but no USD credit amount is published (mimo.xiaomi.com/mimocode and platform.xiaomimimo.com/token-plan, checked 2026-09-16).

Yolo-Auto offers flat-rate LLM API pricing specifically designed for coding agents and high-context developer workflows. It provides an OpenAI-compatible endpoint with no per-token billing on paid plans, emphasizing predictable costs and private inference (no routine prompt logging).

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

ZCode is Zhipu's official coding client for the GLM Coding Plan sold on bigmodel.cn, whose personal tiers are listed in CNY: ¥94.4/month (list ¥118) with 10,000 credits per week, ¥430.4/month (list ¥538) at six times the Lite allowance, and ¥862.4/month (list ¥1078) at fourteen times, each unlocking Claude Code, Codex, Cursor, OpenCode, Cline, Kilo Code and AutoClaw, with ZCode subscribers receiving 150% quota. The platform's API price list shows GLM-5.3 at 8 CNY per million input tokens and 28 CNY output, GLM-5.3-Flash at 0.8/2.8 CNY, GLM-TTS at 2 CNY per 10,000 characters, and Batch calls at half the standard price. New registered users receive 20 million tokens, and GLM-4.7-Flash (200K context) and GLM-4.6V-Flash are listed as free API models.

Allowance is 20,000,000 tokens for newly registered users ('新用户注册得 2000万 Tokens') plus up to 200 million tokens via referral on bigmodel.cn/pricing; no CNY or USD cash value is stated for the grant (checked 2026-09-16).

OAuth access — sign-in with your existing account. Sign in with your Zed account (native-app sign-in). OmniRoute generates a one-time RSA keypair and opens zed.dev to authorize it — on a remote/headless install, copy the resulting 127.0.0.1 callback U 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.

ZenMux is a commercial unified API gateway providing access to 100+ mainstream AI models. It features a unique 'LLM insurance' mechanism that compensates users for slow or failed requests. The platform aggregates models from official providers and authorized cloud partners.

Free tier: basic monitoring plus some free models; once ran limited-time free trials of Claude Opus 4.6 and similar; core is pay-as-you-go with Pro/Max/Ultra paid subscriptions. No quantifiable standing credit.

web-cookie access — wraps the provider web app (unofficial). Login at zenmux.ai, then export all cookies using EditThisCookie or Cookie-Editor and paste the full Cookie header string here. Refresh every ~30 days. 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.

ZeroLimitAI is an AI API aggregator offering free AI chat and a developer API with automatic model routing. It advertises a lifetime access plan for a one-time fee and a free tier for testing. The API is OpenAI-compatible.

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

Zylo API provides a unified OpenAI-compatible gateway to models from Anthropic, OpenAI, Google, and more with zero token markup. Billing is based on base per-token rates deducted from a prepaid balance. A flat platform fee applies when adding credits.

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

b.ai is an OpenAI-compatible LLM gateway (distinct from TheB.AI) focusing on unified multi-model access and privacy. It supports native crypto payments and anonymous access via the https://api.b.ai/v1 base URL.

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

g4f.space is an AI API router providing access to multiple frontier models including Gemini. It emphasizes unrestricted, open-source access but now requires proof-of-work credits for anonymous use to maintain service quality.

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

iFlyTek's Spark (星火) open platform sells its models through xinghuo.xfyun.cn in CNY per million tokens: the flagship Spark-X2.5 is listed at a limited-time 50% discount of 1.60 CNY per million input tokens, 6.00 CNY per million output tokens and 0.24 CNY per million cache-hit tokens. Spark X2 is quoted at 2–3 CNY per million tokens and Spark-X2-Flash at 1–2 CNY, while the small dense models Spark-X2.5-4B (limited-time free) and Spark-X2.5-1.7B (free) are offered at no cost. The same catalogue resells third-party open models such as GLM-5.2 (8 CNY in / 28 CNY out per million) and DeepSeek-V4-Flash (1 CNY in / 2 CNY out), alongside fine-tuning rates from 6 CNY per million tokens.

No cash credit: the platform states new users get 10,000 free voice interactions and 200,000 free tokens per Spark model ('每个模型20万tokens免费额度') on xinghuo.xfyun.cn/sparkapi; no CNY or USD credit figure is published (checked 2026-09-16).

spark-api-open.xf-yun.com is the OpenAI-compatible HTTP endpoint for iFlyTek's Spark (讯飞星火) LLM. It provides access to multimodal models via the iFlyTek Open Platform. A permanently free 'Lite' version is available for developers.

Spark Lite (model=lite) permanently free since May 2024: unlimited tokens, QPS caps only - unquantifiable; one-off token packs for other tiers (~2M tokens ~ $2, promo-dependent); real-name registration required.

T3 Chat (t3.chat) is a multi-model chat client by T3 Tools, Inc. with model selection, web search, attachments and temporary chats, and its terms state that 'the Services are provided to you without charge up to certain usage limits, and usage in excess of these limits may require purchase of additional resources and the payment of fees'. The FAQ documents the usage meter as two buckets — a Base bucket that refills every 4 hours and an Overage bucket that refills on the monthly renewal date — using an illustrative example of 20 Base points plus 200 Overage points (220 total capacity). Price points themselves are not public: /pricing, /plans and /upgrade all return 404 and the terms direct users to the signed-in settings page for pricing details.

No dollar credit or numeric free allowance is published; the terms state only that the Services are 'provided to you without charge up to certain usage limits', with pricing on the signed-in settings page (t3.chat/terms-of-service, checked 2026-09-16).

web-cookie access — wraps the provider web app (unofficial). Paste your session cookie from v0.dev (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.

xAI's API serves the Grok family — flagship grok-4.6 with 500K context at $2.00/$6.00 per 1M and configurable reasoning — plus Voice (agent/TTS/STT) and Imagine image/video generation, all in an OpenAI-compatible shape. X Search and Web Search are first-party server-side tools; free credits are promotional, not a published standing program.

No standing free-credit program published in xAI's docs (checked 2026-09-16). Promotional credits vary by account/region/campaign — confirm in the console at sign-up.

OAuth access — sign-in with your existing account. Sign in with xAI to use api.x.ai models such as Grok 4.5. This is separate from Grok Build JWT sessions, which use cli-chat-proxy.grok.com and grok-build model aliases. 7 models tracked (via OpenRouter catalog).

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