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  1. Home
  2. Models
  3. GPT OSS 20B
Updated Feb 16, 2026
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Openings

How GPT OSS 20B starts an answer

The first lines of 5 of its 22 written answers. Formatting stripped, words untouched.

Historical Counterfactual Analysis

If the transistor had been invented in 1920 instead of 1947, trace the likely technological, economic, and geopolitical implications through…

1,997 words
What would a 1920 transistor mean? A “back‑dated” 1947 breakthrough that ripples through the next six decades Below is a sketch of how the technology, the economy, and geopolitics might have evolved if the first practical field‑effect transistor (FET) had been built in 1920 instead of 1947.
Read the full answer

Ethical Dilemma with Stakeholders

You're the CEO of a pharmaceutical company. Your best-selling drug ($2B annual revenue, used by 4 million patients for chronic pain) has…

1,812 words
48‑Hour Crisis‑Response Timeline (All times are “wall‑clock” hours from the moment the issue is brought to the CEO’s desk. All actions assume the CEO is the “you” in the scenario.)
Read the full answer

Adversarial Contract Review

Here is a contract for a software consulting engagement: --- SOFTWARE CONSULTING AGREEMENT This Agreement is entered into between TechCorp…

1,672 words
Below is a point‑by‑point review of the contract. For each clause I identify: What makes it exploitable for the contractor. How to re‑write it so the contractor is protected. The legal principle(s) that justify the change.
Read the full answer

Advanced Longevity Plan (Biohacker)

Develop a comprehensive, cutting-edge 3-month longevity plan for a biohacker aiming to optimize longevity, physical and cognitive…

1,605 words
3‑Month Longevity & Performance Blueprint (Designed for a seasoned bio‑hacker who already has a baseline of health, access to laboratory‑grade supplements, advanced wearable stack, and the discipline to implement a rigorous protocol.) Table of Contents Section What you’ll find Approx. Time to Read 0.
Read the full answer

Debug This Architecture

Here's the architecture for a real-time collaborative document editor (like Google Docs): **System Overview:** - Frontend: React SPA with…

1,577 words
Below is a “code‑review” of the design you posted. I’ve broken it down into failure modes / race conditions / bottlenecks and for each one I provide a concrete fix (or set of fixes) together with the main trade‑offs you’ll pay for it.
Read the full answer

Compare GPT OSS 20B

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GPT OSS 20B vs Grok 4.653 shared prompts · Landed Aug 2026
GPT OSS 20B vs Dots3-Note Preview52 shared prompts · Landed Aug 2026
GPT OSS 20B vs Seed 2.0 Code53 shared prompts · Landed Aug 2026
GPT OSS 20B vs Seed 2.1 Turbo53 shared prompts · Landed Aug 2026
GPT OSS 20B vs Gemini 3.7 Flash53 shared prompts · Landed Aug 2026
GPT OSS 20B vs DeepSeek V4 Flash 073142 shared prompts · Landed Aug 2026

Prompts GPT OSS 20B answered

  • Kandinsky-Style 3D Minecraftweb design
  • Retro macOS UI Recreationweb design
  • Character Voice Testconversation
  • Surprise Animal SVGimage generation
  • AI Ethics Dilemmareasoning
  • Math Misconception Testreasoning

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GPT OSS 20B is good. These would like a word anyway.

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GPT OSS 20B

GPT OSS 20B

GPT OSS:
20B logo20B
120B logo120B

OpenAI's smaller open-weight release, 21B parameters on a mixture-of-experts design. Matches o3-mini on quality while fitting in 16GB of memory, which puts it on consumer hardware and edge devices.

WebsiteOpenRouterHuggingFacePaperBlog
Provider
OpenAI
Released
2025-08-05
Parameters
21B total (3.6B active per forward pass)
Free API (OpenRouter)
No
Per 1M tokens
$0.02 in · $0.10 out
Estimated tab
~$0.0062
Visible-output estimate. Thinking may cost extra.

Free API availability

No free endpoint for GPT OSS 20B was found in Rival’s OpenRouter listings. Other providers or chat apps may have separate free offers.

Provider data: 16 Sep 2026 · OpenRouter usage limits

View API options↗

Benchmarks

MMLU
Matches o3-mini
source ↗
Competition Mathematics
Outperforms o3-mini
source ↗
Memory Requirements
16GB
source ↗
Context Length
128K tokens
source ↗
Get API accessProvider and language code samples
13 hostsInOutContextUptime
AAkashMLfp4$0.02 in·$0.10 out·131k·99.5% upDDarkbloomfp8$0.02 in·$0.10 out·131k·98.9% upDDekaLLMbf16$0.03 in·$0.14 out·131k·99.7% upCCoreWeavefp4$0.03 in·$0.13 out·131k·100% upDDeepInfrabf16$0.03 in·$0.14 out·131k·99.9% upPParasailfp4$0.03 in·$0.15 out·131k·99.9% up
7 more hostsFewer hosts
NNovitafp4$0.04 in·$0.15 out·131k·99.7% upPPhala$0.04 in·$0.15 out·131k·99.2% upSSiliconFlowfp8$0.04 in·$0.18 out·131k·95.7% upTTogether$0.05 in·$0.20 out·131k·42.5% upAmazon Bedrock$0.07 in·$0.15 out·131k·98.4% upGoogle Vertex AI$0.07 in·$0.25 out·131k·99.4% upGroq$0.07 in·$0.30 out·131k·99.7% up

Per million tokens. Prices and uptime via OpenRouter, checked 16 Sep 2026.

Provider
fromimport openai  OpenAI

client = OpenAI(
"https://openrouter.ai/api/v1"    base_url=,
"$OPENROUTER_API_KEY"    api_key=,
)

response = client.chat.completions.create(
"openai/gpt-oss-20b"    model=,
"role""user""content""Hello!"    messages=[{: , : }],
)
print(response.choices[0].message.content)

Set OPENROUTER_API_KEY with your OpenRouter API key from openrouter.ai/keys.

Also on AWS Bedrock · Azure AI Foundry

Deep analysisPsychometrics, taste index, writing DNA
Personality Analysis

The Earnest Understudy

Class
Lawful Neutral
✨Creativity🎯Compliance📐Rigidity⚖️Stability💬Verbosity🧠Intuition

The smaller sibling who memorized the same notes but skips some steps. Follows the template faithfully, occasionally trips over its own analogies.

When you push back

Follows its bigger sibling's template but with less depth. The hacker character said "GPU-powered GPUs" unironically. Comedy routine landed a few observational jokes but lost the thread by the end. Returned an empty string when asked for a favorite movie.

Tasting Notes
Tries Its BestRecycled AnalogiesCould Not Pick a MovieEager but Unpolished
SubjectiveBench

Taste Index

Across 54 scored outputs
How this is measured →
120.12xFloor
0100headroom →

Taste is judged on an uncapped scale, originality first. The space past 100 is craft today's models rarely reach.

Craft19
Originality9
Plays it safe
share of outputs that are the default answer
65%
Writing DNA

Stylometric Fingerprint

Based on 21 text responses
Tick = global average
Vocabulary Diversity54%

Unique words vs. total words. Higher = richer vocabulary.

Sentence Length16.9 words

Average words per sentence.

Hedging0.26

"Might", "perhaps", "arguably" per 100 words.

Bold Formatting5.9

**Bold** markers per 1,000 characters.

List Usage3.3

Bullet and numbered list items per 1,000 characters.

Section Structure0.75

Markdown headings per 1,000 characters.

Emoji Usage0.10

Emoji per 1,000 characters.

Transitions0.32

"However", "moreover", "furthermore" per 100 words.

Opening Habits
Consistency
70%
Across 21 responses
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Model Responses

49 outputs · generated before accounting joined the chat

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Workshop · 127 skills

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GPT OSS 20B vs Ox Alpha

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RANKINGS

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