awesome-free-ai-coding

Mixlayer

🔌 LLM APIs with free tier · no card · provisional — added recently, two weeks of probes still to pass · live — last verified by a probe on 2026-09-17 · mixlayer.com · back to the whole list

What you get

Serverless open models priced per token, with one of them at $0 — Qwen3.5 4B as qwen/qwen3.5-4b-free, at 131K context — callable without prepaid credit

Free models

qwen3.5-4b

Limits, in the vendor’s words

The pricing page says “Free models stay free; pay-as-you-go for everything else.” and prices its one free row, qwen/qwen3.5-4b-free, at $0.00 in and out, 131K context, vision and text. The billing docs: “Free models do not require prepaid credit.” — a paid model on an empty prepaid balance answers 402. Rate limits are set per organization and per model, and “Mixlayer does not publish fixed limit values because limits can differ by organization and model”. The docs’ introduction sends its first request to the free model. The operator is Mixlayer Labs Inc. Read 2026-09-17

Connect

• Base URL: https://models.mixlayer.ai/v1
• Key: MIXLAYER_API_KEY — get one at https://console.mixlayer.com/app/api-keys
• Callable ids: qwen/qwen3.5-4b-free
• Note: the id is the pricing page’s and the docs’ own example; /v1/models answers 401 without a key, so it is not read off a catalog

Evidence

• Probe: the page at https://www.mixlayer.com/pricing, anchored on qwen/qwen3.5-4b-free, Free models stay free
• Source: https://www.mixlayer.com/pricing
• Source: https://docs.mixlayer.com/credits-and-limits.md
• Source: https://docs.mixlayer.com/introduction.md

History

• next scheduled run — Added to the list: Serverless open models priced per token, with one of them at $0 — Qwen3.5 4B as qwen/qwen3.5-4b-free, at 131K context — callable without prepaid credit

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Generated from registry.yaml on 2026-09-18 and re-verified twice a week; the full list, the Atom feed and the machinery are at https://github.com/mvalentsev/awesome-free-ai-coding.

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