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  5. Gemini 1.5 ProvsGPT-6 Luna
Updated Sep 2026

Gemini 1.5 ProvsGPT-6 Luna

GPT-6 Luna is cheaper than Gemini 1.5 Pro at $0.1/M vs $3.5/M input tokens.

Gemini 1.5 Pro and GPT-6 Luna compared across 1 shared prompts
SpecGemini 1.5 ProGPT-6 Luna
Input price$3.5/M tokens$0.1/M tokens
Output price$10.5/M tokens$0.5/M tokens
Context window1.0M tokens1.1M tokens
Weights—Closed
Free API (OpenRouter)NoNo
ReleasedFeb 2024Sep 2026
Our Verdict
Gemini 1.5 Pro
Gemini 1.5 Pro
GPT-6 Luna
GPT-6 Luna

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

GPT-6 Luna costs 21x less per token.

Too close to call
API pricing

Cost per 1M tokens

Gemini 1.5 Pro
Input
$3.50
Output
$10.50
GPT-6 Luna
Input
$0.10
35× cheaper
Output
$0.50
21× cheaper

GPT-6 Luna is cheaper on both: 35× input, 21× output.

Where to run it

3 hosts, cheapest first

Gemini 1.5 Pro

No hosts listed on OpenRouter.

GPT-6 Luna3 hosts
HostInOutContextUptime
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.

Research

What we learned reading every model

FAQ

Common questions

Gemini 1.5 Pro is developed by Google AI while GPT-6 Luna is developed by OpenAI. Gemini 1.5 Pro has a 1.0M token context window vs GPT-6 Luna's 1.1M. You can compare their actual outputs across 1 challenges on Rival to see how they differ in practice.

It depends on your use case. Gemini 1.5 Pro and GPT-6 Luna each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 1 challenges so you can judge which fits your needs best.

Gemini 1.5 Pro costs $3.5/M input tokens and GPT-6 Luna costs $0.1/M input tokens. GPT-6 Luna is $3.40/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 Gemini 1.5 Pro and GPT-6 Luna 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

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Model pages

Gemini 1.5 Pro logo
Gemini 1.5 Pro20 outputs, specs and price
GPT-6 Luna logo
GPT-6 Luna20 outputs, specs and price
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