GPT OSS 20B by Cloudflare Workers AI

Free coding model via Cloudflare Workers AI (tier A, SWE-bench ~42%).

Access
Free API tier
Free limits
10K neurons/day (shared)
Modality
code, text
Credit card
Not required
Commercial use
Unclear, verify
Context window
128,000 tokens
Model ID
@cf/openai/gpt-oss-20b
Checked
Nov 12, 2026

Benchmarks

LMArena text Elo
1288 · LMArena, Nov 11 2026
Tested as gpt-oss-20b · leaderboard published 2026-11-09
LMArena text rank
#264 of 421 · LMArena, Nov 11 2026
Tested as gpt-oss-20b

Numbers are copied from the linked public leaderboards for this exact model and version. The free endpoint can run a different reasoning setting or quantization than the tested one.

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Frequently asked

Is GPT OSS 20B free?

Yes. Cloudflare Workers AI offers it as Free API tier with these limits: 10K neurons/day (shared). No credit card is required.

Can I use GPT OSS 20B commercially?

Commercial terms are not clearly documented. Check the provider's current terms before shipping.

How do I start using GPT OSS 20B?

Free coding model via Cloudflare Workers AI (tier A, SWE-bench ~42%).

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