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  1. Home
  2. Models
  3. GPT-6 Luna
Updated Sep 25, 2026
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Openings

How GPT-6 Luna starts an answer

The first lines of 5 of its 12 written answers. Formatting stripped, words untouched.

Adversarial Contract Review

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

2,040 words
This agreement is strongly one-sided. The enforceability of particular terms—especially the non-compete, liability provisions, and arbitration clause—depends on the governing law and the facts. The agreement does not identify a governing law, which is itself a significant gap.
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…

1,979 words
The main architectural risk is that the system treats collaborative editing as “write a value, then broadcast it.” That works poorly under concurrency, server failures, reconnects, and scale.
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…

1,930 words
I would not wait six months for more data. A potentially fatal signal affecting a drug used by millions requires immediate safety assessment, prompt engagement with regulators, and a plan to inform patients and clinicians.
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…

1,874 words
12-week longevity and performance plan This plan is for a generally healthy adult who wants to improve fitness, metabolic health, sleep, and cognitive performance—not a substitute for medical care or a promise to slow aging.
Read the full answer

Historical Counterfactual Analysis

If the transistor had been invented in 1920 instead of 1947, trace the likely technological, economic, and geopolitical implications through…

1,472 words
The most important caveat is that inventing a transistor is not the same as inventing the modern semiconductor industry. A device demonstrated in 1920 might be a crude, low-power, unreliable point-contact transistor.
Read the full answer

Compare GPT-6 Luna

GPT-6 Luna vs Ox Alpha20 shared prompts · Landed Aug 2026
GPT-6 Luna vs MiniMax M320 shared prompts · Landed Jun 2026
GPT-6 Luna vs GPT-6 Luna Pro20 shared prompts · Landed Sep 2026
GPT-6 Luna vs GPT-6 Sol Pro20 shared prompts · Landed Sep 2026
GPT-6 Luna vs GPT-6 Sol20 shared prompts · Landed Sep 2026
GPT-6 Luna vs Mercury 2.520 shared prompts · Landed Sep 2026
GPT-6 Luna vs Ling 3.0 Flash Fin (free)20 shared prompts · Landed Sep 2026
GPT-6 Luna vs Muse Spark 1.320 shared prompts · Landed Sep 2026
GPT-6 Luna vs Gemini 3.8 Flash20 shared prompts · Landed Sep 2026
GPT-6 Luna vs Muse Spark 1.3 Contributor20 shared prompts · Landed Sep 2026
GPT-6 Luna vs Grok 4.620 shared prompts · Landed Aug 2026
GPT-6 Luna vs Dots3-Note Preview20 shared prompts · Landed Aug 2026

Prompts GPT-6 Luna answered

  • Mini LBO Underwritefinancial modeling
  • Advanced Longevity Plan (Biohacker)reasoning
  • Debug This Architecturereasoning
  • Explain Like I'm a Specific Expertreasoning
  • Autonomous Drone Simulatorweb design
  • Retro macOS UI Recreationweb design

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GPT-6 Luna

GPT-6 Luna

The fast, lower-cost tier of GPT-6 for chat, classification, and lightweight agent workflows. Luna accepts text, images, and files with the same 1.05-million-token context as Sol.

Ranks#1Business Strategy#1Travel Planning#2Health & Longevity#2Recipes & Cooking#3Practical Tasks#3Summarization
OpenRouterDocs
Provider
OpenAI
Released
2026-09-22
Size
LARGE
Free API (OpenRouter)
No
Per 1M tokens
$0.10 in · $0.50 out
Rival’s tab
$0.02
20/20 receipts survived

Free API availability

No free endpoint for GPT-6 Luna was found in Rival’s OpenRouter listings. Other providers or chat apps may have separate free offers.

Provider data: 25 Sep 2026 · OpenRouter usage limits

View API options↗
Get API accessProvider and language code samples
3 hostsInOutContextUptime
Azure AI Foundry$0.10 in·$0.50 out·1.1M·88.4% upOpenAI$0.10 in·$0.50 out·1.1M·99.9% upAmazon Bedrock$0.11 in·$0.55 out·1.1M·99.8% up

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

Provider
fromimport openai  OpenAI

client = OpenAI(
"https://openrouter.ai/api/v1"    base_url=,
"$OPENROUTER_API_KEY"    api_key=,
)

response = client.chat.completions.create(
"openai/gpt-6-luna"    model=,
"role""user""content""Hello!"    messages=[{: , : }],
)
print(response.choices[0].message.content)

Set OPENROUTER_API_KEY with your OpenRouter API key from openrouter.ai/keys.

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Model Responses

15 outputs · $0.02 tracked across 15 receipts

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GPT-6 Luna vs Ox Alpha

Real outputs compared side by side

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Best AI for Creative Writing

A stand-up set with puns banned, a manifesto against CAPTCHA, an interview wi...