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GPT OSS 20B pricing and alternatives

Paid / limited
Available from Groq
★★★★★★★★★★ 3.5 Benchmark-backed score

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

Paid / limitedOpenAI compatibleReasoningTool callingJSON modeReasoningText
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API Details

Copy-ready connection details

Use these values in your client or SDK.
Base URL
https://api.groq.com/openai/v1
Model ID
openai/gpt-oss-20b
API format OpenAI Chat Completions + OpenAI Responses
No current free listing. This page is kept for comparison and SEO continuity. Check the alternatives below before integrating.
Technical Details

GPT OSS 20B specifications

Provider and model catalog
Context window 131K
Max output 66K
Status Online
Family gpt-oss
Released Aug 5, 2025
Last updated Aug 5, 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 workloads and supports a 131K context window.

Use the comparison and availability sections before choosing this listing, because it is not currently marked as free.

Best for
  • Chat
Strengths & Weaknesses

Strengths

  • Long context window
  • Reasoning mode listed
  • Tool calling support
  • Structured JSON output

Watch outs

  • No current free listing on this provider
  • 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
225 tok/s
Context Maximum listed context window
131K
Pricing

GPT OSS 20B pricing per 1M tokens

Provider pricing
Input $0.05 per 1M tokens
Output $0.2 per 1M tokens
Free access Not listed Groq
Availability

GPT OSS 20B availability by provider

Current provider only

We only found this GPT OSS 20B listing on Groq in the current catalog. Use the related models section for nearby alternatives.

Provider Model listing Access Context API Limits
Groq GPT OSS 20B Paid 131K OpenAI-style Varies
View Groq setup guide →
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.

FAQ

GPT OSS 20B free API FAQ

Is GPT OSS 20B free to use?

GPT OSS 20B is not currently marked as free on Groq.

What is the GPT OSS 20B model ID?

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

What context window does GPT OSS 20B support?

The listed context window is 131K tokens with up to 66K output tokens.

Related Models

Related free models similar to GPT OSS 20B

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Moonshot Kimi K2 Groq · 131K · Free tier Moonshot Kimi K2 0905 Groq · 131K · Free tier groq/compound Groq · 131K · Free tier groq/compound-mini Groq · 131K · Free tier llama-4-scout-17b-16e-instruct Groq · 131K · Check provider qwen3-32b Groq · 131K · Check provider

More about GPT OSS 20B

GPT-OSS 20B is OpenAI's open-weight 21B-parameter Mixture-of-Experts model with 3.6B active per forward pass, available free on OpenRouter (also on Groq, Cerebras, and Cloudflare). Supports reasoning level configuration, fine-tuning, and agentic capabilities — function calling, tool use, and structured outputs. Trained in OpenAI's Harmony response format. Released under Apache 2.0. The low active parameter count enables lower-latency inference on consumer or single-GPU hardware. 131K context window. Text-only. OpenAI-compatible. Free tier: 200 RPD on OpenRouter.

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