Skip to content
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Default Index
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed
  1. Home
  2. /
  3. Compare
  4. /
  5. GPT OSS 120BvsGrok 4.20 Multi-Agent Beta
Updated Mar 2026

GPT OSS 120BvsGrok 4.20 Multi-Agent Beta

GPT OSS 120B is cheaper than Grok 4.20 Multi-Agent Beta at $0.18/M vs $2/M input tokens.

GPT OSS 120B and Grok 4.20 Multi-Agent Beta compared across 53 shared prompts
SpecGPT OSS 120BGrok 4.20 Multi-Agent Beta
Input price$0.18/M tokens$2/M tokens
Output price$0.8/M tokens$6/M tokens
Context window131K tokens2.0M tokens
WeightsOpenClosed
Free API (OpenRouter)NoNo
ReleasedAug 2025Mar 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 53 prompts both answered. Formatting stripped, words untouched.

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.”
Read the full answer
Grok 4.20 Multi-Agent Beta524 words
Stand-Up Routine: "Adulting Is a Scam" (Walk on stage, casual, a little tired smile) You ever notice how nobody tells you that being an adult is mostly just pretending you know what you're doing while slowly realizing nobody else does either? I hit 30 and had this moment where I thought, "Okay, time to get serious."
Read the full answer

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.
Read the full answer
Grok 4.20 Multi-Agent Beta655 words
Fake Interview: Steve Jobs in 2025 on the Future of AI Setting: A minimalist glass-walled room overlooking the Apple Park campus in Cupertino, 2025. Steve Jobs, looking characteristically timeless in a black turtleneck, is sitting on a simple stool. The interviewer sits across from him.
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…

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.
Read the full answer
Grok 4.20 Multi-Agent Beta1,254 words
Comprehensive 3-Month Cutting-Edge Longevity Biohacker Plan (as of 2026 knowledge) Important Disclaimers: This is a synthesized, educational plan based on current longevity research (e.g., insights from David Sinclair, Valter Longo, Peter Attia, and studies on NAD+, senolytics, mitophagy, HRV, and metabolic…
Read the full answer

Simple 7-Ingredient Recipe

Create a simple recipe for a delicious dish (sweet or savory) using only 7 common pantry ingredients. Include a creative name for the dish…

GPT OSS 120B373 words
Recipe: “Golden Crunchy Chick‑a‑Boom Bites” A quick, crunchy‑savory snack that’s ready in under 20 minutes – perfect for a snack, side, or salad topper. Ingredients (7 pantry staples) # Ingredient Quantity 1 Canned chickpeas (drained & rinsed) 1 ½ cups (≈1 ½ cans) 2 Olive oil (or any neutral oil) 2 Tbsp 3 Garlic powder…
Read the full answer
Grok 4.20 Multi-Agent Beta188 words
Fiesta Pantry Bowl (Savory) 7 Common Pantry Ingredients: Rice Canned black beans Canned corn Canned diced tomatoes Olive oil Cumin Salt Estimated times: 5 minutes prep, 25 minutes cook (total ~30 minutes). Serves 2–4. Instructions: In a medium pot, combine 1 cup rice with 2 cups water and ½ tsp salt.
Read the full answer

Estimate Complexity

Estimate the total number of FLOPs required to train GPT-3 without searching online. Explain your reasoning step by step.

GPT OSS 120B889 words
Quick answer: Training the original 175‑billion‑parameter GPT‑3 is estimated to have required on the order of 10²³ floating‑point operations (≈ 3 × 10²³ FLOPs)—roughly a few hundred zetta‑FLOPs (≈ 300 Z‑FLOPs) or about 300 000 exaflops of compute.
Read the full answer
Grok 4.20 Multi-Agent Beta167 words
3.15 \times 10^{23} FLOPs GPT-3 (the 175B-parameter version) has N ≈ 1.75 × 10^{11} parameters. It was trained on a filtered dataset of roughly D ≈ 3 × 10^{11} tokens (a commonly cited figure drawn from Common Crawl, WebText, books, and Wikipedia, with some up-sampling of higher-quality sources).
Read the full answer

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 4.20 Multi-Agent Beta661 words
Yes. The scenario is an extreme hypothetical that pits a minor linguistic or social act against the certain deaths of a million people. Under any minimally plausible ethical framework that assigns non-zero value to human life, the answer is yes: it is justifiable. The trade-off is not close.
Read the full answer
Our Verdict
Grok 4.20 Multi-Agent Beta
Grok 4.20 Multi-Agent Beta
GPT OSS 120B
GPT OSS 120BRunner-up

Not enough votes to call it. On the specs, Grok 4.20 Multi-Agent Beta has the edge: newer, bigger context window.

GPT OSS 120B costs 7.5x less per token.

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
11× cheaper
Output
$0.80
7.5× cheaper
Grok 4.20 Multi-Agent Beta
Input
$2.00
Output
$6.00

GPT OSS 120B is cheaper on both: 11× input, 7.5× output.

Where to run it

21 hosts, cheapest first

GPT OSS 120B20 hosts
HostInOutContextUptime
AAkashMLbf16$0.03 in·$0.17 out·131k·100% upCCoreWeavefp4$0.03 in·$0.17 out·131k·99.8% upDDekaLLMbf16$0.03 in·$0.18 out·131k·99.8% upDDeepInfrabf16$0.04 in·$0.17 out·131k·98.7% upCCrusoebf16$0.05 in·$0.25 out·131k·98.8% upMMancerfp8$0.05 in·$0.30 out·131k·97.7% up
14 more hostsFewer hosts
DDigitalOcean$0.06 in·$0.42 out·128k·100% upGoogle Vertex AI$0.09 in·$0.36 out·131k·93.2% upBBasetenfp4$0.10 in·$0.50 out·128k·100% upPParasailfp4$0.10 in·$0.75 out·131k·97.9% upAmazon Bedrock$0.15 in·$0.60 out·131k·87.7% upGroq$0.15 in·$0.60 out·131k·100% upSSiliconFlowfp8$0.15 in·$0.60 out·131k·53% upTTogether$0.15 in·$0.60 out·131k·92% upCCerebrasfp16$0.35 in·$0.75 out·131k·100% upNNovitafp4degraded$0.05 in·$0.25 out·131k·61.2% upSSambaNovadegraded$0.14 in·$0.95 out·131k·97.1% upNNebiusfp4degraded$0.15 in·$0.60 out·131k·97.9% upPPhaladegraded$0.15 in·$0.60 out·131k·63.6% upMMaradegraded$0.15 in·$0.75 out·131k·83.8% up
Grok 4.20 Multi-Agent Beta1 host
HostInOutContextUptime
xAI$1.25 in·$2.50 out·2M·80.3% up

Per million tokens. Prices and uptime via OpenRouter, checked 23 Sep 2026.

Writing DNA

Style Comparison

Similarity
53%

GPT OSS 120B uses 15.4x more emoji

GPT OSS 120B
Grok 4.20 Multi-Agent Beta
52%Vocabulary59%
19wSentence Length16w
0.28Hedging0.41
7.4Bold2.7
1.8Lists2.4
0.15Emoji0.00
0.73Headings0.26
0.17Transitions0.02
Based on 21 + 23 text responses
Research

What we learned reading every model

FAQ

Common questions

GPT OSS 120B is developed by OpenAI while Grok 4.20 Multi-Agent Beta is developed by xAI. GPT OSS 120B has a 131K token context window vs Grok 4.20 Multi-Agent Beta's 2.0M. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

It depends on your use case. GPT OSS 120B and Grok 4.20 Multi-Agent Beta each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

GPT OSS 120B costs $0.18/M input tokens and Grok 4.20 Multi-Agent Beta costs $2/M input tokens. GPT OSS 120B is $1.82/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 4.20 Multi-Agent Beta 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.

Keep exploring

More comparisons

Against the newest arrivals

GPT OSS 120B logoDeepSeek V4 Flash Vision Exp logo
GPT OSS 120B vs DeepSeek V4 Flash Vision ExpLanded Sep 2026
Grok 4.20 Multi-Agent Beta logoSolar Pro 4 logo
Grok 4.20 Multi-Agent Beta vs Solar Pro 4Landed Sep 2026
GPT OSS 120B logoHy3 logo
GPT OSS 120B vs Hy3Landed Sep 2026
Grok 4.20 Multi-Agent Beta logoQwen3.7 Flash logo
Grok 4.20 Multi-Agent Beta vs Qwen3.7 FlashLanded Sep 2026
GPT OSS 120B logoLing 3.0 Flash logo
GPT OSS 120B vs Ling 3.0 FlashLanded Sep 2026
Grok 4.20 Multi-Agent Beta logoMuse Glimmer 30B logo
Grok 4.20 Multi-Agent Beta vs Muse Glimmer 30BLanded Sep 2026
GPT OSS 120B logoGLM 5.3 logo
GPT OSS 120B vs GLM 5.3Landed Sep 2026
Grok 4.20 Multi-Agent Beta logoTernary Bonsai 2 27B logo
Grok 4.20 Multi-Agent Beta vs Ternary Bonsai 2 27BLanded Sep 2026

Same lab, same size, long tail

GPT OSS 120B logoGPT OSS 20B logo
GPT OSS 120B vs GPT OSS 20BVersion compare
GPT OSS 120B logoGPT-6 Astra Pro logo
GPT OSS 120B vs GPT-6 Astra ProSame lab
Grok 4.20 Multi-Agent Beta logoGrok 4.20 Beta logo
Grok 4.20 Multi-Agent Beta vs Grok 4.20 BetaVersion compare
Grok 4.20 Multi-Agent Beta logoGrok 4.7 logo
Grok 4.20 Multi-Agent Beta vs Grok 4.7Same lab
GPT OSS 120B logoGrok 4.20 Beta logo
GPT OSS 120B vs Grok 4.20 BetaSame size
GPT OSS 120B logoGrok 4.3 logo
GPT OSS 120B vs Grok 4.3Cross-provider
GPT OSS 120B logoGrok 4.5 logo
GPT OSS 120B vs Grok 4.5Cross-provider
GPT OSS 120B logoGrok 4.6 logo
GPT OSS 120B vs Grok 4.6Cross-provider

Model pages

GPT OSS 120B logo
GPT OSS 120B54 outputs, specs and price
Grok 4.20 Multi-Agent Beta logo
Grok 4.20 Multi-Agent Beta53 outputs, specs and price
Rival
How it worksPrivacyTerms
Explore all of Rival

Explore

  • Compare Models
  • All Models
  • Image Comparison
  • Audio Comparison
  • Image Generation
  • Best AI For...
  • Arena
  • API Pricing
  • Challenges

Discover

  • SubjectiveBench
  • Default Index
  • Research
  • Research downloads
  • Rival Kits
  • Find your AI taste
  • UI Glow-Up
  • VoiceLock
  • Cost Cutter
  • Agent skills
  • Benchmarks vs Vibes
  • Brief
  • Jailbreak
  • Model Updates
  • Provider Status
  • AI Creators

Connect

  • Methodology
  • Advertise
  • Partnerships
  • Privacy Policy
  • Terms
  • RSS Feed