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-5.1 Codex MaxvsTernary Bonsai 2 27B
Updated Sep 2026

GPT-5.1 Codex MaxvsTernary Bonsai 2 27B

Ternary Bonsai 2 27B is the newer model, released after GPT-5.1 Codex Max.

GPT-5.1 Codex Max and Ternary Bonsai 2 27B compared across 9 shared prompts
SpecGPT-5.1 Codex MaxTernary Bonsai 2 27B
Input price—$0.075/M tokens
Output price—$0.5/M tokens
Context window—262K tokens
WeightsClosed—
Free API (OpenRouter)NoNo
ReleasedDec 2025Sep 2026
Side by side

Same prompt, both answers

Opening lines from 2 of the 9 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-5.1 Codex Max175 words
Sunset Chickpea & Tomato Skillet A cozy, savory one-pan dish that comes together with staples you likely have on hand. Ingredients (7): 1 can (15 oz) chickpeas, drained and rinsed 1 can (14–15 oz) crushed tomatoes 1 medium onion, finely chopped 2 cloves garlic, minced (or 1 tsp garlic powder) 2 tbsp olive oil 1 tsp…
Read the full answer
Ternary Bonsai 2 27B358 words
🍫 Velvet Hour Skillet Cakes A one-pan, one-pan-pour, one-lick-the-spoon kind of dessert. Fluffy, deeply chocolate, and done before your coffee goes cold. Serves: 2–3 Prep: 10 min Cook: 12–15 min Total: ~25 min The 7 Ingredients # Ingredient Amount 1 All-purpose flour ¾ cup 2 Granulated sugar ⅓ cup 3 Unsweetened cocoa…
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-5.1 Codex Max386 words
Here's a simple four‑week framework to help you ease into healthier habits. It keeps the focus on three big levers you can control and builds gradually so it feels doable. Key areas: Nourishing food, regular movement, and rest/recovery.
Read the full answer
Ternary Bonsai 2 27B729 words
1-Month Foundation Plan: Health & Longevity How to Use This Plan Pick one area per week's focus while maintaining the other two at a baseline level. The point is consistency over intensity. You're building a habit identity, not a transformation.
Read the full answer
Our Verdict
GPT-5.1 Codex Max
GPT-5.1 Codex Max
Ternary Bonsai 2 27B
Ternary Bonsai 2 27BRunner-up

Not enough votes to call it. On the specs, GPT-5.1 Codex Max has the edge: bigger model tier, major provider backing.

Too close to call
API pricing

Cost per 1M tokens

GPT-5.1 Codex Max
Input
—
Output
—
Ternary Bonsai 2 27B
Input
$0.07
Output
$0.50
Where to run it

2 hosts

GPT-5.1 Codex Max1 host
HostInOutContextUptime
Azure AI Foundry$1.25 in·$10.00 out·400k·100% up
Ternary Bonsai 2 27B1 host
HostInOutContextUptime
DDarkbloomint4$0.07 in·$0.50 out·262k·100% up

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

Research

What we learned reading every model

FAQ

Common questions

GPT-5.1 Codex Max is developed by OpenAI while Ternary Bonsai 2 27B is developed by PrismML. You can compare their actual outputs across 9 challenges on Rival to see how they differ in practice.

It depends on your use case. GPT-5.1 Codex Max and Ternary Bonsai 2 27B each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 9 challenges so you can judge which fits your needs best.

This page shows a side-by-side comparison of GPT-5.1 Codex Max and Ternary Bonsai 2 27B 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-5.1 Codex Max logoDeepSeek V4 Flash Vision Exp logo
GPT-5.1 Codex Max vs DeepSeek V4 Flash Vision ExpLanded Sep 2026
Ternary Bonsai 2 27B logoSolar Pro 4 logo
Ternary Bonsai 2 27B vs Solar Pro 4Landed Sep 2026
GPT-5.1 Codex Max logoHy3 logo
GPT-5.1 Codex Max vs Hy3Landed Sep 2026
Ternary Bonsai 2 27B logoQwen3.7 Flash logo
Ternary Bonsai 2 27B vs Qwen3.7 FlashLanded Sep 2026
GPT-5.1 Codex Max logoLing 3.0 Flash logo
GPT-5.1 Codex Max vs Ling 3.0 FlashLanded Sep 2026
Ternary Bonsai 2 27B logoMuse Glimmer 30B logo
Ternary Bonsai 2 27B vs Muse Glimmer 30BLanded Sep 2026
GPT-5.1 Codex Max logoGLM 5.3 logo
GPT-5.1 Codex Max vs GLM 5.3Landed Sep 2026
Ternary Bonsai 2 27B logoGLM 5.3 Flash logo
Ternary Bonsai 2 27B vs GLM 5.3 FlashLanded Sep 2026

Same lab, same size, long tail

GPT-5.1 Codex Max logoGPT-6 Astra Pro logo
GPT-5.1 Codex Max vs GPT-6 Astra ProSame lab
GPT-5.1 Codex Max logoGPT-6 Astra logo
GPT-5.1 Codex Max vs GPT-6 AstraSame lab
Ternary Bonsai 2 27B logoMercury 2.5 Preview logo
Ternary Bonsai 2 27B vs Mercury 2.5 PreviewSame size
Ternary Bonsai 2 27B logoNemotron 3.5 Lightning logo
Ternary Bonsai 2 27B vs Nemotron 3.5 LightningSame size
GPT-5.1 Codex Max logoMiMo-V2.6-Pro logo
GPT-5.1 Codex Max vs MiMo-V2.6-ProNew provider
Ternary Bonsai 2 27B logoMiniMax M1 logo
Ternary Bonsai 2 27B vs MiniMax M1New provider
Ternary Bonsai 2 27B logoMiniMax M2 logo
Ternary Bonsai 2 27B vs MiniMax M2Same size
GPT-5.1 Codex Max logoMiniMax M2-her logo
GPT-5.1 Codex Max vs MiniMax M2-herNew provider

Model pages

GPT-5.1 Codex Max logo
GPT-5.1 Codex Max53 outputs, specs and price
Ternary Bonsai 2 27B logo
Ternary Bonsai 2 27B9 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