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-5.3-CodexvsGrok 4.7
Updated Sep 2026

GPT-5.3-CodexvsGrok 4.7

Grok 4.7 is cheaper than GPT-5.3-Codex at $1.6/M vs $1.75/M input tokens.

GPT-5.3-Codex and Grok 4.7 compared across 10 shared prompts
SpecGPT-5.3-CodexGrok 4.7
Input price$1.75/M tokens$1.6/M tokens
Output price$14/M tokens$4.8/M tokens
Context window400K tokens500K tokens
WeightsClosedClosed
Free API (OpenRouter)NoNo
ReleasedFeb 2026Sep 2026
Side by side

Same prompt, both answers

Opening lines from 5 of the 10 prompts both answered. Formatting stripped, words untouched.

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-5.3-Codex203 words
Recipe: “Weeknight Volcano Pasta” 🌋🍝 A cozy, spicy-savory pasta made from pantry staples in about 25 minutes. Ingredients (7 pantry items) 8 oz dried pasta (any shape) 1 can (15 oz) cannellini or great northern beans, drained 1 can (14–15 oz) crushed tomatoes 2 tbsp olive oil 1 tsp garlic powder 1 tsp dried oregano…
Read the full answer
Grok 4.7129 words
Pantry Gold Honey Biscuits A sweet, buttery, slightly salty biscuit that tastes like it took more effort than it did. Ingredients (7) 2 cups all-purpose flour 1 tbsp baking powder ½ tsp salt ¼ cup sugar ½ cup butter (cold) ¾ cup milk 2 tbsp honey Time: about 10 minutes prep, 12–15 minutes bake Instructions Heat the…
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…

GPT-5.3-Codex1,188 words
Great prompt. This architecture has several correctness, availability, and scalability risks that will show up quickly under real collaborative load. Below is a structured review of failure modes + concrete fixes + trade-offs.
Read the full answer
Grok 4.71,399 words
This design will lose edits, split users into inconsistent views, and fall over under concurrent writing. The core problems are clock-based conflict resolution, per-server WebSocket fan-out, polling as the sync path, and treating documents as full HTML snapshots.
Read the full answer

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-5.3-Codex600 words
For the experienced software engineer Think of an LLM as a very large, probabilistic autocomplete service trained on a massive corpus of text and code. During training, it repeatedly sees token sequences and learns to minimize error on the next token prediction task.
Read the full answer
Grok 4.71,173 words
1. Experienced software engineer An LLM is a stateless function from a token sequence to a probability distribution over the next token. Training is a giant batch job: you stream text, run a forward pass, compare the predicted distribution to the actual next token with cross-entropy, and push gradients through billions…
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…

GPT-5.3-Codex470 words
Great goal. Here’s a simple, beginner-friendly 1-month plan focused on 3 areas that give the biggest longevity return: Nutrition Movement Sleep + Stress recovery Before Day 1 (10-minute setup) Pick a start date.
Read the full answer
Grok 4.7442 words
1-month beginner plan for better health and longevity Focus on three foundations: nutrition, movement, and sleep. Aim for consistency over perfection. If you have a medical condition, check with a clinician before big changes. Week-by-week rhythm Week 1: Build awareness and one easy habit in each area.
Read the full answer

Startup Pitch Teardown

Here's a pitch deck summary for a startup called "MindMeld AI": **Slide 1 - Vision:** "We're building the future of human-AI collaboration.…

GPT-5.3-Codex429 words
Great concept, but three claims stand out as especially weak from an investor diligence perspective: “MindMeld AI reads your brainwaves to predict what you want to type before you think it.” (Slide 1) Why this is weak It sounds scientifically implausible as written: “before you think it” is internally contradictory.
Read the full answer
Grok 4.7599 words
Three weakest claims 1. “Predict what you want to type before you think it” (Slide 1) This is scientifically incoherent, not just ambitious. Non-invasive EEG decodes neural activity that is already underway (motor imagery, attempted speech, attention).
Read the full answer
Our Verdict
GPT-5.3-Codex
GPT-5.3-Codex
Grok 4.7
Grok 4.7

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

Too close to call
API pricing

Cost per 1M tokens

GPT-5.3-Codex
Input
$1.75
Output
$14.00
Grok 4.7
Input
$1.60
1.1× cheaper
Output
$4.80
2.9× cheaper

Grok 4.7 is cheaper on both: 1.1× input, 2.9× output.

Where to run it

3 hosts

GPT-5.3-Codex2 hosts
HostInOutContextUptime
Azure AI Foundry$1.75 in·$14.00 out·400k·100% upOpenAI$1.75 in·$14.00 out·400k·100% up
Grok 4.71 host
HostInOutContextUptime
xAI$1.60 in·$4.80 out·500k·99% up

Per million tokens. Prices and uptime via OpenRouter, checked 22 Sep 2026.

Research

What we learned reading every model

FAQ

Common questions

GPT-5.3-Codex is developed by OpenAI while Grok 4.7 is developed by xAI. GPT-5.3-Codex has a 400K token context window vs Grok 4.7's 500K. You can compare their actual outputs across 10 challenges on Rival to see how they differ in practice.

It depends on your use case. GPT-5.3-Codex and Grok 4.7 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 10 challenges so you can judge which fits your needs best.

GPT-5.3-Codex costs $1.75/M input tokens and Grok 4.7 costs $1.6/M input tokens. Grok 4.7 is $0.15/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-5.3-Codex and Grok 4.7 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-5.3-Codex logoDeepSeek V4 Flash Vision Exp logo
GPT-5.3-Codex vs DeepSeek V4 Flash Vision ExpLanded Sep 2026
Grok 4.7 logoSolar Pro 4 logo
Grok 4.7 vs Solar Pro 4Landed Sep 2026
GPT-5.3-Codex logoHy3 logo
GPT-5.3-Codex vs Hy3Landed Sep 2026
Grok 4.7 logoQwen3.7 Flash logo
Grok 4.7 vs Qwen3.7 FlashLanded Sep 2026
GPT-5.3-Codex logoLing 3.0 Flash logo
GPT-5.3-Codex vs Ling 3.0 FlashLanded Sep 2026
Grok 4.7 logoMuse Glimmer 30B logo
Grok 4.7 vs Muse Glimmer 30BLanded Sep 2026
GPT-5.3-Codex logoGLM 5.3 logo
GPT-5.3-Codex vs GLM 5.3Landed Sep 2026
Grok 4.7 logoTernary Bonsai 2 27B logo
Grok 4.7 vs Ternary Bonsai 2 27BLanded Sep 2026

Same lab, same size, long tail

GPT-5.3-Codex logoGPT-6 Astra Pro logo
GPT-5.3-Codex vs GPT-6 Astra ProSame lab
GPT-5.3-Codex logoGPT-6 Astra logo
GPT-5.3-Codex vs GPT-6 AstraSame lab
Grok 4.7 logoGrok 4.6 logo
Grok 4.7 vs Grok 4.6Same lab
Grok 4.7 logoGrok 4.5 logo
Grok 4.7 vs Grok 4.5Same lab
Grok 4.7 logoGPT-5.6 Terra logo
Grok 4.7 vs GPT-5.6 TerraSame size
Grok 4.7 logoGPT-6 Astra logo
Grok 4.7 vs GPT-6 AstraCross-provider
Grok 4.7 logoGPT OSS 120B logo
Grok 4.7 vs GPT OSS 120BCross-provider
Grok 4.7 logoGPT OSS 20B logo
Grok 4.7 vs GPT OSS 20BSame size

Model pages

GPT-5.3-Codex logo
GPT-5.3-Codex53 outputs, specs and price
Grok 4.7 logo
Grok 4.710 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