gpt-oss-120b Free API on Cloudflare Workers AI

Free API Verified

Available from Cloudflare Workers AI

Catalog profile Reasoning provider catalog metadata

Open GPT reasoning model for self-hosted agents and controllable deployments

Free APIOpenAI compatibleReasoningTool callingJSON modeTextReasoning

Try in Playground Compare Save API Key

API Details

Copy-ready connection details

Use these values in your client or SDK.

Base URL

https://api.cloudflare.com/client/v4/accounts/{account_id}/ai/run

Model ID

@cf/openai/gpt-oss-120b

API format Cloudflare Workers AI native run + OpenAI Chat Completions

Technical Details

gpt-oss-120b specifications

Provider catalog

Context window 128K

Max output 131K

Status Online

Released Aug 5, 2025

Last updated Jul 5, 2026

Free listing since Aug 5, 2025

Input text, reasoning

Output text

Capabilities reasoning, tool calling, structured output

AI Recommendation

Should you use gpt-oss-120b?

gpt-oss-120b is listed for chat, coding workloads and supports a 128K context window.

Use it when Cloudflare Workers AI's free tier is enough for evaluation, demos, or light production traffic.

Best for

Chat
Coding

Strengths & Weaknesses

Strengths

Useful for coding workflows
Long context window
Reasoning mode listed
Tool calling support

Watch outs

Free-tier rate limits apply
Vision support is not listed

Pricing

gpt-oss-120b pricing per 1M tokens

Free tier listed

Input $0.35 per 1M tokens

Output $0.75 per 1M tokens

Free access Available Cloudflare Workers AI

Rate limit 10K neurons/day (shared) provider policy

Availability

gpt-oss-120b availability by provider

Current provider only

We only found this gpt-oss-120b listing on Cloudflare Workers AI in the current catalog. Use the related models section for nearby alternatives.

Provider	Model listing	Access	Context	API	Limits
Cloudflare Workers AI	@cf/openai/gpt-oss-120b	Free tier	128K	Native	10K neurons/day (shared)

View Cloudflare Workers AI setup guide →

Compare

gpt-oss-120b alternatives to consider

Open comparison

Model	Provider	Context	Access
Mistral 7B	Cloudflare Workers AI	33K	Free tier
Qwen 1.5 7B	Cloudflare Workers AI	33K	Free tier
@cf/meta/llama-3.3-70b-instruct-fp8-fast	Cloudflare Workers AI	131K	Free tier
@cf/meta/llama-4-scout-17b-16e-instruct	Cloudflare Workers AI	10.0M	Free tier
@cf/moonshotai/kimi-k2.7-code	Cloudflare Workers AI	262K	Free tier

Typical Use Cases

gpt-oss-120b use cases

Chat

gpt-oss-120b is tagged for chat in this catalog and works with OpenAI-compatible client libraries.

Coding

gpt-oss-120b is tagged for coding in this catalog and works with OpenAI-compatible client libraries.

FAQ

gpt-oss-120b free API FAQ

Is gpt-oss-120b free to use?

gpt-oss-120b is listed with free API access on Cloudflare Workers AI, subject to the provider's quota and account policy.

What is the gpt-oss-120b model ID?

The model ID shown in this catalog is @cf/openai/gpt-oss-120b.

What are the gpt-oss-120b free tier rate limits on Cloudflare Workers AI?

The listed free tier limit is 10K neurons/day (shared). Limits can change per account tier, so confirm against the provider dashboard.

What context window does gpt-oss-120b support?

The listed context window is 128K tokens with up to 131K output tokens.

More about gpt-oss-120b