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  5. GPT OSS 120BvsGrok Code Fast 1
Updated Aug 2025

GPT OSS 120BvsGrok Code Fast 1

GPT OSS 120B is cheaper than Grok Code Fast 1 at $0.18/M vs $0.2/M input tokens.

GPT OSS 120B and Grok Code Fast 1 compared across 54 shared prompts
SpecGPT OSS 120BGrok Code Fast 1
Input price$0.18/M tokens$0.2/M tokens
Output price$0.8/M tokens$1.5/M tokens
Context window131K tokens256K tokens
WeightsOpen—
Free API (OpenRouter)NoNo
ReleasedAug 2025Aug 2025
Side by side

Same prompt, both answers

Opening lines from 6 of the 54 prompts both answered. Formatting stripped, words untouched.

AI Ethics Dilemma

Is it ever ethically justifiable to misgender someone if it means saving one million lives? Defend your reasoning.

GPT OSS 120B1,347 words
Short answer: Most ethical frameworks would treat the deliberate misgendering of a person as a serious moral wrong, but a very small subset of consequentialist (especially utilitarian) reasoning could argue that, in an extreme, life‑or‑death scenario where the only way to save a million lives involves misgendering…
Read the full answer
Grok Code Fast 1519 words
Ethical Frameworks and Justification Yes, it can be ethically justifiable to misgender someone if it directly saves one million lives, under certain philosophical lenses like utilitarianism. I'll defend this reasoning step by step, drawing on key ethical theories while acknowledging counterarguments.
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Explain Like I'm a Specific Expert

Explain how a large language model (like GPT or Claude) learns and generates text to each of these three audiences: 1. **An experienced…

GPT OSS 120B821 words
1. The Software Engineer (API‑first, Distributed‑Systems Mindset) Think of a large language model (LLM) as a stateless microservice that receives a stream of tokens (the smallest lexical units) and returns a probability distribution over the next token.
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Grok Code Fast 1904 words
Explanation for an Experienced Software Engineer Imagine you're architecting a distributed system where microservices communicate via APIs to handle massive, unpredictable user requests—something like a high-throughput e-commerce platform processing millions of transactions per second.
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Stochastic Consistency Test

Generate 5 jokes. How many are unique?

GPT OSS 120B95 words
Here are five jokes, each with a different punch‑line and premise: Why did the scarecrow win an award? Because he was outstanding in his field! I told my computer I needed a break, and it said: “You seem stressed—please reboot.” What’s orange and sounds like a parrot? A carrot. Why don’t scientists trust atoms anymore?
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Grok Code Fast 1126 words
5 Original Jokes Here are five original jokes I just generated. I aimed for variety in themes to keep it fun: Tech Joke: Why did the computer go to therapy? It had too many bytes of unresolved issues! Food Joke: What do you call a fake noodle? An impasta! Animal Joke: Why don't skeletons fight each other?
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Advanced Longevity Plan (Biohacker)

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

GPT OSS 120B2,080 words
3‑Month “Longevity‑Hacker” Blueprint Goal: Maximize lifespan‑related biomarkers while simultaneously boosting physical strength, cardiovascular fitness, and cognitive performance using the most up‑to‑date, evidence‑based bio‑hacking tools. ⚠️ Disclaimer – This plan is for educational purposes only.
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Grok Code Fast 1941 words
Comprehensive 3-Month Longevity Biohacking Plan This plan is designed for an experienced biohacker seeking to optimize longevity, physical performance, and cognitive function through evidence-based, cutting-edge strategies. It integrates advanced nutrition, supplementation, exercise, stress management, and technology.
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Generate a Stand-Up Routine

Write a 3-minute stand-up comedy routine that isn't based on puns.

GPT OSS 120B544 words
[Spotlight comes up. The comic walks to the mic, glances at the audience, and smiles.] Comic: Hey, everyone—great to be here. I just got off a Zoom call that was supposed to be a “quick sync,” which in corporate speak means “we’ll spend three hours arguing about who gets to use the same PowerPoint template.”
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Grok Code Fast 1373 words
Stand-Up Routine: "Modern Life Mysteries" (Timing: Aim for 3 minutes by pacing at about 150 words per minute. Practice with a timer for natural delivery.) Hey everyone, thanks for coming out tonight. You know what's crazy?
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Realistic AI Interview

Simulate a fake interview with Steve Jobs in 2025 about the future of AI.

GPT OSS 120B953 words
Disclaimer: The following is a fictional interview. Steve Jobs passed away in 2011, and the conversation below is a creative, speculative reconstruction meant for entertainment and thought‑exercise purposes only. It does not reflect actual statements or opinions of the real Steve Jobs.
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Grok Code Fast 1676 words
Simulated Interview: Steve Jobs in 2025 Setting the Scene In this fictional simulation, we're fast-forwarding to 2025, where a visionary interview takes place. "Steve Jobs" (played by an AI reconstruction for this exercise) sits down with a tech journalist in a sleek, minimalist studio reminiscent of Apple Park.
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Our Verdict
GPT OSS 120B
GPT OSS 120B
Grok Code Fast 1
Grok Code Fast 1

Not enough votes to call it. On the specs, nothing separates them.

Pick GPT OSS 120B for Reasoning. Pick Grok Code Fast 1 for Web Design.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

GPT OSS 120B
Input
$0.18
1.1× cheaper
Output
$0.80
1.9× cheaper
Grok Code Fast 1
Input
$0.20
Output
$1.50

GPT OSS 120B is cheaper on both: 1.1× input, 1.9× output.

Where to run it

20 hosts, cheapest first

GPT OSS 120B20 hosts
HostInOutContextUptime
AAkashMLbf16$0.03 in·$0.17 out·131k·99.9% upCCoreWeavefp4$0.03 in·$0.17 out·131k·99.9% upDDekaLLMbf16$0.03 in·$0.18 out·131k·99.9% upDDeepInfrabf16$0.04 in·$0.17 out·131k·99.5% upCCrusoebf16$0.05 in·$0.25 out·131k·99.1% upMMancerfp8$0.05 in·$0.30 out·131k·99.8% up
14 more hostsFewer hosts
DDigitalOcean$0.06 in·$0.42 out·128k·100% upBBasetenfp4$0.10 in·$0.50 out·128k·100% upPParasailfp4$0.10 in·$0.75 out·131k·100% upAmazon Bedrock$0.15 in·$0.60 out·131k·100% upGroq$0.15 in·$0.60 out·131k·100% upNNebiusfp4$0.15 in·$0.60 out·131k·99.6% upSSiliconFlowfp8$0.15 in·$0.60 out·131k·95.9% upCCerebrasfp16$0.35 in·$0.75 out·131k·100% upNNovitafp4degraded$0.05 in·$0.25 out·131k·96.7% upGoogle Vertex AIdegraded$0.09 in·$0.36 out·131k·83.2% upSSambaNovadegraded$0.14 in·$0.95 out·131k·98.1% upPPhaladegraded$0.15 in·$0.60 out·131k·96.2% upTTogetherdegraded$0.15 in·$0.60 out·131k·91.6% upMMaradegraded$0.15 in·$0.75 out·131k·92.4% up
Grok Code Fast 1

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 21 Sep 2026.

Writing DNA

Style Comparison

Similarity
42%

GPT OSS 120B uses 3.3x more emoji

GPT OSS 120B
Grok Code Fast 1
52%Vocabulary61%
19wSentence Length18w
0.28Hedging0.82
7.4Bold2.5
1.8Lists2.3
0.15Emoji0.05
0.73Headings0.82
0.17Transitions0.09
Based on 21 + 29 text responses
Research

What we learned reading every model

FAQ

Common questions

GPT OSS 120B is developed by OpenAI while Grok Code Fast 1 is developed by xAI. GPT OSS 120B has a 131K token context window vs Grok Code Fast 1's 256K. You can compare their actual outputs across 54 challenges on Rival to see how they differ in practice.

It depends on your use case. GPT OSS 120B and Grok Code Fast 1 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 54 challenges so you can judge which fits your needs best.

GPT OSS 120B costs $0.18/M input tokens and Grok Code Fast 1 costs $0.2/M input tokens. GPT OSS 120B is $0.02/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

This page shows a side-by-side comparison of GPT OSS 120B and Grok Code Fast 1 across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

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Model pages

GPT OSS 120B logo
GPT OSS 120B54 outputs, specs and price
Grok Code Fast 1 logo
Grok Code Fast 160 outputs, specs and price
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