What can OpenAI: gpt-oss-20b (free) do?

OpenAI: gpt-oss-20b (free) is a multimodal AI model with a 131.072K token context window.

How much does OpenAI: gpt-oss-20b (free) cost?

Input pricing starts at $0.00 per million tokens. Output is $0.00 per million tokens. Cached input is $0.00 per million tokens. 0 provider(s) currently offer this model.

Where can I access OpenAI: gpt-oss-20b (free)?

OpenAI: gpt-oss-20b (free) is developed by OpenAI and available through 0 provider(s). The model has closed weights. Verified: Source-linked

How fast is OpenAI: gpt-oss-20b (free)?

OpenAI: gpt-oss-20b (free) has a reported throughput of 34.0 tokens per second. Context length: 131072 tokens.

Models / OpenAI

OpenAI: gpt-oss-20b (free)

openai/gpt-oss-20b:free

gpt-oss-20b is an open-weight 21B parameter model released by OpenAI under the Apache 2.0 license. It uses a Mixture-of-Experts (MoE) architecture with 3.6B active parameters per forward pass, optimized for...

Input modalitiesT

Output modalitiesT

Source-linkedClosed weights

Report data

Context window131.072K

Maximum output32.768K

Provider offers0

Knowledge cutoffUndisclosed

Capabilities

What this model supports

ReasoningNo

Tool callingNo

Structured outputNo

AttachmentsNo

Temperature controlNo

Open weightsNo

Creator: OpenAI
Family: Not documented
Modalities: Text
License: Not documented
Release date: Not documented
Model ID: openai/gpt-oss-20b:free

Market availability

Provider pricing

Report price →

No known providers available.

Evidence

Published benchmark results

Agentic Index vs top 8 models

GPT-5.6 Sol

54.0

Claude Fable 5

52.8

GPT-5.6 Terra

47.4

Anthropic: Claude Opus 4.8

47.2

Claude Sonnet 5

46.7

xAI: Grok 4.5

45.7

GPT-5.6 Luna

45.6

OpenAI: gpt-oss-20b (free)

3.1

Coding Index vs top 8 models

GPT-5.6 Sol

77.4

GPT-5.6 Terra

76.7

Claude Fable 5

76.5

GPT-5.5

74.9

Anthropic: Claude Opus 4.8

74.3

Anthropic: Claude Opus 4.7

73.6

xAI: Grok 4.5

72.4

OpenAI: gpt-oss-20b (free)

20.7

Design Arena: dataviz vs top 8 models

Z.ai: GLM 5.1

1366.0

Claude Fable 5

1363.0

xAI: Grok 4.5

1330.0

Anthropic: Claude Opus 4.6

1322.0

Anthropic: Claude Opus 4.7

1322.0

Z.ai: GLM 5.2

1316.0

Anthropic: Claude Sonnet 4.6

1316.0

OpenAI: gpt-oss-20b (free)

974.0

Design Arena: website vs top 8 models

Z.ai: GLM 5.2

1346.0

Claude Fable 5

1338.0

Anthropic: Claude Opus 4.6

1331.0

Anthropic: Claude Opus 4.7

1329.0

xAI: Grok 4.5

1325.0

Anthropic: Claude Sonnet 4.6

1320.0

Claude Sonnet 5

1314.0

OpenAI: gpt-oss-20b (free)

888.0

Intelligence Index vs top 8 models

Claude Fable 5

59.9

GPT-5.6 Sol

58.9

Anthropic: Claude Opus 4.8

55.7

GPT-5.6 Terra

55.0

GPT-5.5

54.8

xAI: Grok 4.5

53.8

Anthropic: Claude Opus 4.7

53.5

OpenAI: gpt-oss-20b (free)

14.9