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GPT-OSS 20B

OpenAIOpen weightsNon-reasoningVerifiedReleased Aug 5, 2025Input: text
Compare with Granite 4.2 8BSource scores ↗OpenRouter ↗
Overall score
33.3
Rank 171 of 222 · 19.9–46.6
Context window
128K
128,000 tokens
Price per 1M tokens
$0.018 in · $0.090 out
Source: OpenRouter
Blended price
$0.036
3:1 input:output tokens
Output speed
—
Not measured yet

Category scores

Scores per capability area with the model's rank among ranked models in that category.

  1. 1Instruction following#6079.2
  2. 2Reasoning48.8
  3. 3Coding43.1
  4. 4Knowledge27.4
Higher is better. #N is the model's rank in that category, where it is eligible to be ranked.

Benchmark results (8)

As reported in system cards, papers and public evaluations. Position compares this model with every other model reporting the same benchmark.

Knowledge

GPQA71.5#77 of 117
HLE10.9#65 of 69
MMLU85.3#14 of 28

Coding

SWE-bench Verified60.7#75 of 98
React Native Evals71.0#15 of 15

Math

AIME 202591.7#11 of 38
AIME 202492.1#3 of 19

Multimodal

Design Arena Website854#89 of 91

Pricing by source

USD per 1M tokens.

SourceInputOutputCached in
List price (OpenRouter)$0.018$0.090—
OpenRouter openai/gpt-oss-20b$0.018$0.090$0.009

Open-weight model. Self-hosted or third-party hosted costs vary by provider and infrastructure.

Arena ratings

Human-preference ratings from LMArena. Best-rated variant shown.

Text1287#260 · 10.4K votes

Open weights

From the Hugging Face repository.

Parameters
21B
Licence
apache-2.0
Downloads (30 days)
5.9M

Speed

Measured by us through OpenRouter (median of trials).

Not measured yet.

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