gpt-oss:20b Free API on Ollama Cloud

Free API Verified

Available from Ollama Cloud

★★★★★★★★★★ 3.5 Benchmark-backed score

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.ollama.com

Model ID

gpt-oss:20b

API format OpenAI-style

Technical Details

gpt-oss:20b specifications

Provider and model catalog

Context window 131K

Max output 131K

Status Online

Family gpt-oss

Released Aug 5, 2025

Last updated Aug 6, 2026

Free listing since Aug 5, 2025

Input text

Output text

Capabilities reasoning, tool calling, structured output, temperature control

Open weights Yes

Weights Hugging Face

AI Recommendation

Should you use gpt-oss:20b?

gpt-oss:20b is listed for chat, coding workloads and supports a 131K context window.

Use it when Ollama Cloud'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

Benchmark Overview

Benchmark signals for gpt-oss:20b

Measured data

Intelligence General reasoning and instruction following

14.9/100

Coding Programming and code generation

20.7/100

Agentic Tool use and multi-step tasks

3.1/100

Speed Observed generation speed

165 tok/s

Context Maximum listed context window

131K

Pricing

gpt-oss:20b pricing per 1M tokens

Free tier listed

Input $0.07 per 1M tokens

Output $0.2 per 1M tokens

Free access Available Ollama Cloud

Rate limit Session/weekly limits (unpublished) provider policy

Availability

gpt-oss:20b availability by provider

1 alternative

We found 2 provider listings for gpt-oss-20b. Check model ID, quota, pricing, and API format before switching providers.

Provider	Model listing	Access	Context	API	Limits
Ollama Cloud	gpt-oss:20b	Free tier	131K	OpenAI-style	Session/weekly limits (unpublished)
LLM7.io	GPT OSS 20B	Free tier	131K	Native	Varies

View Ollama Cloud setup guide →

Compare

gpt-oss:20b alternatives to consider

Open comparison

Model	Provider	Context	Access
GPT OSS 20B	LLM7.io	131K	Free tier
deepseek-v4-pro	Ollama Cloud	128K	Free tier
deepseek-v4-flash	Ollama Cloud	1.0M	Free tier
minimax-m3	Ollama Cloud	1.0M	Free tier
kimi-k3	Ollama Cloud	128K	Free tier

Typical Use Cases

gpt-oss:20b use cases

Chat

gpt-oss:20b is tagged for chat in this catalog and works with OpenAI-compatible client libraries.

Coding

gpt-oss:20b is tagged for coding in this catalog and works with OpenAI-compatible client libraries.

FAQ

gpt-oss:20b free API FAQ

Is gpt-oss:20b free to use?

gpt-oss:20b is listed with free API access on Ollama Cloud, subject to the provider's quota and account policy.

What is the gpt-oss:20b model ID?

The model ID shown in this catalog is gpt-oss:20b.

What are the gpt-oss:20b free tier rate limits on Ollama Cloud?

The listed free tier limit is Session/weekly limits (unpublished). Limits can change per account tier, so confirm against the provider dashboard.

What context window does gpt-oss:20b support?

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

More about gpt-oss:20b

Open-weight GPT model for self-hosted reasoning and instruction-following workloads

For API keys, setup steps, and provider-level limits, see the Ollama Cloud provider page.