Where to use gpt-oss-20b for free
3 free ways to use gpt-oss-20b (OpenAI): rate limits per source, context window, tool calling and vision support, and how to self-host it.
OpenAI · open weights · 131k context · tool calling · 2 of 3 verified · how we verify
Free sources
Verified first
| Offer | Served as | RPM | RPD | TPM | Context | Card | Resets | Status |
|---|---|---|---|---|---|---|---|---|
 Groq Free Tier | openai/gpt-oss-20b | 30 | 1,000 | 8,000 | 131k | no card | — | Verified · Oct 12, 2026 |
 LLM7.io Free Tier | gpt-oss:20b | 60 | — | — | 128k | no card | resets daily | Verified · Oct 12, 2026 |
 Cloudflare Workers AI Free Tier | @cf/openai/gpt-oss-20b | 300 | — | — | — | no card | resets daily | Listed · Oct 21, 2026 |
gpt-oss-20b has open weights: you can download the file and run it under its license. Why some models download and others do not (5 min)
Run gpt-oss-20b yourself
Free forever by self-hosting
Ollama (MIT) runs on your own machine with no quota.
Runs the same open-weight models (gpt-oss, Qwen) locally, slower than Groq's hardware.
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Frequently asked questions
- Where can I use gpt-oss-20b for free?
- 3 listed offers serve gpt-oss-20b free: Groq Free Tier, LLM7.io Free Tier, Cloudflare Workers AI Free Tier. The tightest published daily cap among them is 1,000 requests per day.
- What context window does gpt-oss-20b have on free tiers?
- The largest context any listed free source documents for gpt-oss-20b is 131k tokens. Some free tiers cap it lower; the per-source value is in the table.
- Does gpt-oss-20b support tool calling and vision?
- As documented by its free sources, gpt-oss-20b supports tool calling and does not accept image input.
Limits are what each provider publishes; a dash means the provider publishes none, and no number here is guessed. Rows are re-checked monthly (how we verify).