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HPC-AI Model APIs free tier

🎁 Trials (no card when possible) · no card · not offered in mainland China · live — last verified by a probe on 2026-11-01 · hpc-ai.com · back to the whole list

What you get

OpenAI-compatible inference with $2 of signup credit, or $4 in total with the vendor invite code, before any deposit

Free models

The free offer is a budget for model usage across the catalog. See Limits for its conditions and Connect for API details, where available.

Limits, in the vendor’s words

Standard signup grant: $2 once per account

Signup grant with invite code: $4 once per account (Use invite code HPCAI-MAPI)

L0 before first deposit: 5 requests/minute per account per model; for zai-org/glm-5.3-flash, moonshotai/kimi-k2.7-code, zai-org/glm-5.3, deepseek/deepseek-v4-flash, anthropic/claude-fable-5, anthropic/claude-opus-4.7, anthropic/claude-opus-4.8, anthropic/claude-opus-5, moonshotai/kimi-k3, openai/gpt-5.5, openai/gpt-oss-120b, qwen/qwen3.8-2.4t-a95b, qwen/qwen3.8-max, zai-org/glm-5.2, anthropic/claude-opus-4.6, xiaomi/mimo-v2.5-pro, xiaomi/mimo-v2.5, moonshotai/kimi-k2.6, nvidia/nemotron-3-ultra-550b-a55b, minimax/minimax-m3, qwen/qwen-3.5-397b-a17b, qwen/qwen-3.5-35b-a3b, qwen/qwen-3.5-27b

Standard L0 models: 2,000,000 tokens/minute per account per model; for zai-org/glm-5.3-flash, moonshotai/kimi-k2.7-code, zai-org/glm-5.3, deepseek/deepseek-v4-flash, anthropic/claude-fable-5, anthropic/claude-opus-4.7, anthropic/claude-opus-4.8, anthropic/claude-opus-5, moonshotai/kimi-k3, openai/gpt-5.5, openai/gpt-oss-120b, qwen/qwen3.8-2.4t-a95b, qwen/qwen3.8-max, zai-org/glm-5.2, xiaomi/mimo-v2.5-pro, xiaomi/mimo-v2.5, moonshotai/kimi-k2.6, nvidia/nemotron-3-ultra-550b-a55b, minimax/minimax-m3, qwen/qwen-3.5-397b-a17b, qwen/qwen-3.5-35b-a3b, qwen/qwen-3.5-27b

L0: Claude Opus 4.6: 10,000,000 tokens/minute per account per model; for anthropic/claude-opus-4.6

The invite-code grant is the total signup balance, not an extra amount added to the standard grant; supplies are limited. Credit spends at model list prices. L0 applies before the first deposit; spending alone does not promote an account to L1. Claude Opus 4.6 has a higher token rate than the other positive-RPM L0 models; DeepSeek V4 Pro has zero L0 RPM. No card requirement or credit expiry is published.

Where it is offered

Not offered in mainland China (source, read 2026-10-19). That leaves out 5.9% of the developers GitHub counts, beyond the countries under comprehensive US embargo (Innovation Graph, 2026 Q1). In the vendor’s words: “The Services are not offered or made available to customers or users located in Mainland China.”.

What happens to what you send

What you send is not used to train models. In the vendor’s words: “No customer request data is used for model training unless explicitly agreed otherwise.” (source).

Connect

Base URL: https://api.hpc-ai.com/inference/v1
Key: HPC_AI_API_KEY — get one at https://www.hpc-ai.com/models-console/api-key
Codex CLI: configs/codex/hpc-ai.config.toml — copy it to ~/.codex/, then codex -p hpc-ai; set up on the lane by the vendor’s own page, https://www.hpc-ai.com/doc/docs/Model-APIs/Integration/Codex/: “Codex CLI and the Codex IDE extension share the same config.toml layers”
Callable ids: zai-org/glm-5.3-flash, moonshotai/kimi-k2.7-code, minimax/minimax-m3
Note: ids are the keyless model list’s at www.hpc-ai.com/api/maas/v1/models, 2026-09-17, the quick start’s own example being moonshotai/kimi-k2.7-code

Try it from your terminal with your key in HPC_AI_API_KEY — it goes from your machine to the vendor and nowhere else:

curl -s https://api.hpc-ai.com/inference/v1/chat/completions \
  -H "Authorization: Bearer $HPC_AI_API_KEY" \
  -H 'Content-Type: application/json' \
  -d '{"model":"zai-org/glm-5.3-flash","messages":[{"role":"user","content":"2+2? MAKE NO MISTAKES."}]}'

Evidence

Probe: the page at https://www.hpc-ai.com/model-apis, anchored on Do you offer a free trial for users? and in free credits. New accounts using the invite code in the page’s own data; ids checked in https://www.hpc-ai.com/api/maas/v1/models
Source: https://www.hpc-ai.com/model-apis
Source: https://www.hpc-ai.com/doc/docs/Model-APIs/User-Guides/Rate-Limit/
Source: https://www.hpc-ai.com/doc/docs/Model-APIs/User-Guides/QuickStart/
Source: https://www.hpc-ai.com/api/maas/v1/models

History

Each line is a change to what this page publishes, dated the day it reached the list, in UTC.

2026-09-17 — Added: OpenAI-compatible APIs over 24 models, GLM 5.3 Flash, Kimi K3 and MiniMax M3 among them, with $2 of free credit for every user — $4 with the vendor’s invite code — at 5 requests a minute until a first deposit

Generated from registry.yaml on 2026-11-02 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.

Something wrong or missing? Suggest a service or a change — or read how the list works.