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  5. Gemma 4 26B A4BvsGPT-6 Luna Pro
Updated Sep 2026

Gemma 4 26B A4BvsGPT-6 Luna Pro

GPT-6 Luna Pro is cheaper than Gemma 4 26B A4B at $0.1/M vs $0.13/M input tokens.

Gemma 4 26B A4B and GPT-6 Luna Pro compared across 20 shared prompts
SpecGemma 4 26B A4BGPT-6 Luna Pro
Input price$0.13/M tokens$0.1/M tokens
Output price$0.4/M tokens$0.5/M tokens
Context window262K tokens1.1M tokens
WeightsOpenClosed
Free API (OpenRouter)Yes (1 provider)No
ReleasedApr 2026Sep 2026
Side by side

Same prompt, both answers

Opening lines from 6 of the 20 prompts both answered. Formatting stripped, words untouched.

Advanced Longevity Plan (Biohacker)

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

Gemma 4 26B A4B757 words
Disclaimer: I am an AI, not a doctor. The following plan involves potent physiological interventions, pharmacological agents, and extreme dietary shifts. Consult with a medical professional and perform baseline blood work (including ApoB, HbA1c, hs-CRP, Vitamin D, and Testosterone/Estradiol) before implementation.
Read the full answer
GPT-6 Luna Pro2,057 words
12-week longevity and performance plan This is a structured starting plan for a generally healthy adult—not a diagnosis or a substitute for medical care. The best longevity interventions are still the unglamorous ones: not smoking, regular exercise, adequate sleep, a high-quality diet, healthy blood pressure and…
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…

Gemma 4 26B A4B545 words
To avoid burnout, the secret to longevity is consistency over intensity. This plan follows a "progressive loading" model: you start with small wins in Week 1 and gradually build complexity. Here is your 1-month roadmap focusing on Nutrition, Movement, and Sleep.
Read the full answer
GPT-6 Luna Pro327 words
A simple 1-month plan for better health and longevity Choose three foundations: eating well, moving regularly, and sleeping consistently. Aim for steady habits, not perfection. Diet: Make nourishing choices easier Week 1: Add one serving of fruit or vegetables to one meal each day.
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.…

Gemma 4 26B A4B558 words
This is a high-ambition pitch that falls into a common trap for deep-tech startups: the "Science Fiction Gap." While the vision is compelling, several claims lack the scientific and operational credibility required to justify a $15M Series A.
Read the full answer
GPT-6 Luna Pro401 words
“94% accuracy” and “works with any language, any device” Why it’s weak: “Accuracy” is undefined. It could mean classifying a small set of prompted words in a controlled lab—not reliably generating free-form text.
Read the full answer

Mini LBO Underwrite

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

Gemma 4 26B A4B435 words
Financial Model (FY2026–FY2030) Entry Calculations (End of FY2025): Purchase Price (EV): $120\text{m} \times 12.0\text{x} = \$1,440\text{m}$ Transaction Fees: $1,440\text{m} \times 2\% = \$28.8\text{m}$ Total Uses: $\$1,440\text{m} + \$28.8\text{m} = \$1,468.8\text{m}$ Debt (Total 5.5x): $\$120\text{m} \times 5.5 =…
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GPT-6 Luna Pro434 words
Operating and debt schedule Conventions: Interest is calculated on beginning-of-year debt; the 1% Term Loan amortization is 1% of its original $480m principal ($4.8m annually). Mezzanine PIK accrues at 2% annually.
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Adversarial Contract Review

Here is a contract for a software consulting engagement: --- SOFTWARE CONSULTING AGREEMENT This Agreement is entered into between TechCorp…

Gemma 4 26B A4B894 words
Disclaimer: I am an AI, not an attorney. This analysis is for informational purposes only and does not constitute legal advice. You should consult with a qualified legal professional before signing any contract.
Read the full answer
GPT-6 Luna Pro2,116 words
This agreement is heavily one-sided. Several terms let the Client expand the work, delay or deny payment, claim ownership of the Contractor’s existing materials, and expose the Contractor to potentially unlimited liability.
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…

Gemma 4 26B A4B751 words
This architecture contains several critical flaws that would lead to data loss, massive synchronization delays, and "split-brain" scenarios in a production environment. Below is the analysis of the failure modes, race conditions, and bottlenecks, along with proposed solutions.
Read the full answer
GPT-6 Luna Pro1,906 words
The main architectural risk is that this design treats collaborative editing as ordinary “last write wins” data storage. It is not: edits need a well-defined order, reliable propagation, and a conflict model that preserves concurrent work.
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Our Verdict
GPT-6 Luna Pro
GPT-6 Luna Pro
Gemma 4 26B A4B
Gemma 4 26B A4BRunner-up

Not enough votes to call it. On the specs, GPT-6 Luna Pro has the edge: newer, bigger context window.

Too close to call

Reviewing agent-written code?See a Brief PR report

API pricing

Cost per 1M tokens

Gemma 4 26B A4B
Input
$0.13
Output
$0.40
1.3× cheaper
GPT-6 Luna Pro
Input
$0.10
1.3× cheaper
Output
$0.50

GPT-6 Luna Pro wins input (1.3× cheaper)·Gemma 4 26B A4B wins output (1.3× cheaper)

Where to run it

14 hosts, cheapest first

Gemma 4 26B A4B12 hosts
HostInOutContextUptime
DDarkbloom$0.04 in·$0.22 out·131k·99.9% upDDekaLLMbf16$0.06 in·$0.33 out·262k·99.9% upDDeepInfrafp8$0.07 in·$0.34 out·262k·99.7% upNNextBitbf16$0.09 in·$0.30 out·262k·99.9% upCloudflare Workers AI$0.10 in·$0.30 out·256k·99.9% upCCoreWeavebf16$0.10 in·$0.30 out·262k·99.7% up
6 more hostsFewer hosts
MMakora$0.10 in·$0.34 out·256k·99.3% upNNovitabf16$0.13 in·$0.40 out·262k·99.8% upPParasailbf16$0.13 in·$0.40 out·262k·99.6% upVVenicebf16$0.13 in·$0.40 out·256k·99.5% upSSiliconFlowfp8$0.14 in·$0.40 out·262k·98.1% upGoogle Vertex AI$0.15 in·$0.60 out·262k·96.9% up
GPT-6 Luna Pro2 hosts
HostInOutContextUptime
Azure AI Foundry$0.10 in·$0.50 out·1.1M·98.6% upOpenAI$0.10 in·$0.50 out·1.1M·99.9% up

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

Research

What we learned reading every model

FAQ

Common questions

Gemma 4 26B A4B is developed by Google AI while GPT-6 Luna Pro is developed by OpenAI. Gemma 4 26B A4B has a 262K token context window vs GPT-6 Luna Pro's 1.1M. You can compare their actual outputs across 20 challenges on Rival to see how they differ in practice.

It depends on your use case. Gemma 4 26B A4B and GPT-6 Luna Pro each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 20 challenges so you can judge which fits your needs best.

Gemma 4 26B A4B costs $0.13/M input tokens and GPT-6 Luna Pro costs $0.1/M input tokens. GPT-6 Luna Pro is $0.03/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 Gemma 4 26B A4B and GPT-6 Luna Pro 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

Gemma 4 26B A4B logo
Gemma 4 26B A4B58 outputs, specs and price
GPT-6 Luna Pro logo
GPT-6 Luna Pro20 outputs, specs and price
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