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. GLM 5.3 PrimevsGrok Code Fast 1
Updated Sep 2026

GLM 5.3 PrimevsGrok Code Fast 1

Grok Code Fast 1 is cheaper than GLM 5.3 Prime at $0.2/M vs $2.8/M input tokens.

GLM 5.3 Prime and Grok Code Fast 1 compared across 16 shared prompts
SpecGLM 5.3 PrimeGrok Code Fast 1
Input price$2.8/M tokens$0.2/M tokens
Output price$8.8/M tokens$1.5/M tokens
Context window1.0M tokens256K tokens
Free API (OpenRouter)NoNo
ReleasedSep 2026Aug 2025
Side by side

Same prompt, both answers

Opening lines from 6 of the 16 prompts both answered. Formatting stripped, words untouched.

Mini LBO Underwrite

You are underwriting a 5-year LBO for a private equity investment committee. Company (fictional): HarborTech Services (HTS) –…

GLM 5.3 Prime510 words
HarborTech Services – LBO Underwriting Summary Entry Economics EV = 12.0x × $120m = $1,440m; fees = 2% × 1,440 = $28.8m; total uses = $1,468.8m Debt: Term Loan = 4.0x × 120 = $480m (9% cash, 1%/yr amort); Mezz = 1.5x × 120 = $180m (12% cash + 2% PIK) Sponsor equity = 1,468.8 − 660 = $808.8m (~55% of cap) Annual Model…
Read the full answer
Grok Code Fast 1835 words
Year-by-Year Table (FY2026–FY2030) Assumptions: Revenue growth: FY2026: 8% on $900m = $972m; FY2027: 7% on $972m ≈ $1,040m; FY2028: 6% on $1,040m ≈ $1,102m; FY2029: 5% on $1,102m ≈ $1,158m; FY2030: 5% on $1,158m ≈ $1,215m. EBITDA: Revenue × margin (FY2026: 14%; FY2027: 15%; FY2028: 16%; FY2029: 16.5%; FY2030: 17%).
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…

GLM 5.3 Prime232 words
3-Month Advanced Longevity Optimization Protocol Disclaimer: This is educational content, not medical advice. Consult a physician before starting supplements, fasting, or intense exercise—especially if you take medications (e.g., statins, blood thinners, diabetes meds) or have chronic conditions.
Read the full answer
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.
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…

GLM 5.3 Prime1,397 words
Architecture Review: Real-Time Collaborative Editor Critical Issues Client-clock timestamps for last-write-wins (LWR) Problem: Client clocks are unreliable (skew, manual changes, timezone bugs). A user with a fast clock always wins; a slow clock's edits are silently dropped.
Read the full answer
Grok Code Fast 11,742 words
Below is a comprehensive analysis of the provided architecture for a real-time collaborative document editor. I'll identify potential failure modes (events or conditions that could lead to system unavailability, data loss, or incorrect behavior), race conditions (situations where concurrent operations lead to…
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…

GLM 5.3 Prime212 words
Golden Comfort Garlic Butter Pasta A cozy, restaurant-worthy dish made from everyday pantry staples! Ingredients (7 total) Spaghetti (or any pasta) Butter Garlic (3–4 cloves) Olive oil Parmesan cheese (grated) Red pepper flakes Salt Instructions Boil the pasta – Bring a large pot of salted water to a boil.
Read the full answer
Grok Code Fast 1170 words
Speedy Garlic Bliss Bites A savory, cheesy treat that's quick to whip up from basic staples—perfect for snacking or as a side. Ingredients (7 common pantry items): 4 slices of bread (any type) 2 tbsp butter 2 cloves garlic, minced 1/2 cup shredded cheese (like cheddar or mozzarella) 1 tbsp chopped parsley (fresh or…
Read the full answer

Beginner's Longevity Plan

Outline a simple, actionable 1-month plan for someone starting their journey towards better health and longevity. Focus on 3 key areas…

GLM 5.3 Prime419 words
1-Month Health & Longevity Starter Plan The 3 Pillars: Movement, Nourishment, Sleep Week 1: Foundation (Build Awareness) Exercise Walk 15 minutes daily (any time that fits your schedule) Do a 5-minute stretch routine each morning Goal: consistency, not intensity Diet Track what you eat (apps like MyFitnessPal or just…
Read the full answer
Grok Code Fast 1628 words
1-Month Plan for Better Health and Longevity This plan focuses on three key areas: Diet, Exercise, and Sleep. It's designed for beginners, emphasizing small, sustainable changes to build habits without overwhelm. Aim to track your progress in a journal or app, and remember: consistency beats perfection.
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…

GLM 5.3 Prime1,847 words
48-Hour Action Plan First, the governing principle One number matters more than all others: 4 million patients × 1/8,000 = ~500 patients at risk of liver failure over 5 years — some may already be experiencing it right now. Every decision below flows from this.
Read the full answer
Grok Code Fast 11,235 words
Below is a specific, hour-by-hour action plan for the next 48 hours as the CEO of this pharmaceutical company. The plan prioritizes patient safety and ethical obligations above all else, as the core duty of a pharmaceutical leader is to protect patients, even at short-term cost.
Read the full answer
Our Verdict
GLM 5.3 Prime
GLM 5.3 Prime
Grok Code Fast 1
Grok Code Fast 1Runner-up

Not enough votes to call it. On the specs, GLM 5.3 Prime has the edge: bigger model tier, newer, bigger context window.

Grok Code Fast 1 costs 5.9x less per token.

Too close to call
API pricing

Cost per 1M tokens

GLM 5.3 Prime
Input
$2.80
Output
$8.80
Grok Code Fast 1
Input
$0.20
14× cheaper
Output
$1.50
5.9× cheaper

Grok Code Fast 1 is cheaper on both: 14× input, 5.9× output.

Where to run it

1 host

GLM 5.3 Prime1 host
HostInOutContextUptime
Alibaba Cloud$2.80 in·$8.80 out·1M·99.9% up
Grok Code Fast 1

No hosts listed on OpenRouter.

Per million tokens. Prices and uptime via OpenRouter, checked 25 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

GLM 5.3 Prime is developed by Z.ai while Grok Code Fast 1 is developed by xAI. GLM 5.3 Prime has a 1.0M token context window vs Grok Code Fast 1's 256K. You can compare their actual outputs across 16 challenges on Rival to see how they differ in practice.

It depends on your use case. GLM 5.3 Prime and Grok Code Fast 1 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 16 challenges so you can judge which fits your needs best.

GLM 5.3 Prime costs $2.8/M input tokens and Grok Code Fast 1 costs $0.2/M input tokens. Grok Code Fast 1 is $2.60/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 GLM 5.3 Prime 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.

Keep exploring

More comparisons

Against the newest arrivals

GLM 5.3 Prime logoSolar Mini 4 logo
GLM 5.3 Prime vs Solar Mini 4Landed Sep 2026
Grok Code Fast 1 logoQwen3.8 Max Prime logo
Grok Code Fast 1 vs Qwen3.8 Max PrimeLanded Sep 2026
GLM 5.3 Prime logoQwen3.8 Omni Flash logo
GLM 5.3 Prime vs Qwen3.8 Omni FlashLanded Sep 2026
Grok Code Fast 1 logoCommand A+ logo
Grok Code Fast 1 vs Command A+Landed Sep 2026
GLM 5.3 Prime logoClaude Opus 5.5 logo
GLM 5.3 Prime vs Claude Opus 5.5Landed Sep 2026
Grok Code Fast 1 logoGPT-6 Luna Pro logo
Grok Code Fast 1 vs GPT-6 Luna ProLanded Sep 2026
GLM 5.3 Prime logoGPT-6 Sol Pro logo
GLM 5.3 Prime vs GPT-6 Sol ProLanded Sep 2026
Grok Code Fast 1 logoGPT-6 Luna logo
Grok Code Fast 1 vs GPT-6 LunaLanded Sep 2026

Same lab, same size, long tail

GLM 5.3 Prime logoGLM 5.1 logo
GLM 5.3 Prime vs GLM 5.1Same lab
GLM 5.3 Prime logoGLM 5 Turbo logo
GLM 5.3 Prime vs GLM 5 TurboSame lab
Grok Code Fast 1 logoGrok 4.7 logo
Grok Code Fast 1 vs Grok 4.7Same lab
Grok Code Fast 1 logoGrok 4.6 logo
Grok Code Fast 1 vs Grok 4.6Version compare
Grok Code Fast 1 logoQwen3.5 27B logo
Grok Code Fast 1 vs Qwen3.5 27BSame size
Grok Code Fast 1 logoQwen3.5 35B A3B logo
Grok Code Fast 1 vs Qwen3.5 35B A3BSame size
Grok Code Fast 1 logoQwen3.5 397B A17B logo
Grok Code Fast 1 vs Qwen3.5 397B A17BNew provider
GLM 5.3 Prime logoQwen3.5 9B logo
GLM 5.3 Prime vs Qwen3.5 9BNew provider

Model pages

GLM 5.3 Prime logo
GLM 5.3 Prime16 outputs, specs and price
Grok Code Fast 1 logo
Grok Code Fast 160 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