Gemini 4 Argon vs GPT-6 Luna
Gemini 4 Argon scores higher on the Models at Work leaderboard (85 vs 66 out of 100). GPT-6 Luna is about 9.9× cheaper per blended million tokens ($0.20 vs $1.99, one figure an Artificial Analysis estimate). On Artificial Analysis' independent Intelligence Index, Gemini 4 Argon leads 53 to 38.
| Gemini 4 Argon · Google | GPT-6 Luna · OpenAI | |
|---|---|---|
| Leaderboard rank | #3 | #10 |
| Score (0–100) | 85 | 66 |
| Tier | Frontier | Fast and cheap |
| Price per 1M tokens | $1.99 blended (estimate) | $0.10 in · $0.50 out |
| Context window | 1M | 1M |
| Open weights | No | No |
| Artificial Analysis Intelligence Index | 53 | 38 |
| Arena text score | 1525 | — |
| Best for | Chat and assistant products, Google Cloud shops, Price-sensitive frontier work | ChatGPT Free and Go tier, Simple extraction, Cost floors |
Choose Gemini 4 Argon if…
- you need chat and assistant products
- you need google cloud shops
- you need price-sensitive frontier work
Wins the popularity contest: first on Arena, mid-pack on the index, and priced like a workhorse.
Caveats: Google's public pricing page did not list Argon when read; the blended figure is Artificial Analysis' estimate.
Choose GPT-6 Luna if…
- you need chatgpt free and go tier
- you need simple extraction
- you need cost floors
OpenAI's ten-cent model: the one every ChatGPT Free user now has, and the one Haiku users keep comparing themselves to.
What practitioners say
Gemini 4 Argon: The announcement thread ran to 1,190 comments; the independent analysis thread was smaller and more measured.
Questions people ask
Which is better, Gemini 4 Argon or GPT-6 Luna?
Gemini 4 Argon scores higher on the Models at Work leaderboard (85 vs 66 out of 100). GPT-6 Luna is about 9.9× cheaper per blended million tokens ($0.20 vs $1.99, one figure an Artificial Analysis estimate). On Artificial Analysis' independent Intelligence Index, Gemini 4 Argon leads 53 to 38.
When should I choose Gemini 4 Argon over GPT-6 Luna?
Choose Gemini 4 Argon for chat and assistant products, google cloud shops, price-sensitive frontier work. Wins the popularity contest: first on Arena, mid-pack on the index, and priced like a workhorse.
When should I choose GPT-6 Luna over Gemini 4 Argon?
Choose GPT-6 Luna for chatgpt free and go tier, simple extraction, cost floors. OpenAI's ten-cent model: the one every ChatGPT Free user now has, and the one Haiku users keep comparing themselves to.
Which is cheaper, Gemini 4 Argon or GPT-6 Luna?
Google does not publish a simple list price for Gemini 4 Argon; Artificial Analysis estimates a blended $1.99 per million tokens (three input to one output). GPT-6 Luna costs $0.10 per million input tokens and $0.50 per million output tokens on OpenAI's list price (OpenAI API pricing, read Oct 10, 2026).
Scores come from the Models at Work leaderboard: Score is 0 to 100: 50% independent evals normalised within this table, 20% price-performance, 15% practitioner sentiment from Signals and community threads, 15% operational fit (context, speed, availability, open weights). Models within three points are a tie in practice. Vendor-published figures are labelled as such and never counted as independent. Prices are vendor list prices where published; blended figures assume three input tokens per output token.