Head to head
GPT-6 Astra vs Gemini 4 Argon
Which is better, GPT-6 Astra or Gemini 4 Argon?
Gemini 4 Argon finishes ahead of GPT-6 Astra on the index, 90.6 to 84.9. It is the stronger of the two on Craft, Speed and Value, while GPT-6 Astra still leads on Control. Both are scored on the same rubric, in the same week, and neither placing is sponsored.
Updated
GPT-6 Astra
21 of 73
84.9
OpenAI's most capable model: a specialist for the hardest problems, priced like one.
Gemini 4 Argon
03 of 73
90.6
Top of the human-preference leaderboard, and almost nobody can use it yet.
The four scores, side by side
| Score | GPT-6 Astra | Gemini 4 Argon | Difference |
|---|---|---|---|
| Craft | 91 | 97 | +6 |
| Speed | 72 | 78 | +6 |
| Control | 91 | 84 | +7 |
| Value | 70 | 84 | +14 |
| Index score | 84.9 | 90.6 | +5.7 |
Which to pick
Pick Gemini 4 Argon unless Control is what decides it for you, which is exactly where GPT-6 Astra is the better answer.
GPT-6 Astra
Astra sits above the Sol and Luna tiers of GPT-6 and is the model OpenAI points at its most demanding work, with a million-token window and a long thinking budget. It ties for third on the Artificial Analysis index, but human voters rate it well below the cheaper GPT-6.1 Sol, and it shares the top price band in this index with Claude Fable 5.1. OpenAI rates its cyber capability as critical, which shapes what it will and will not do.
Where it shines
- OpenAI's strongest model on hard reasoning and mathematics
- Million-token context with a thinking budget you control
- Backed by the deepest tooling ecosystem of any lab
Gemini 4 Argon
Gemini 4 Argon is Google's new flagship, announced on 30 September and first on the arena leaderboard, though that rating is still marked preliminary. Google says it leads on real-world coding and enterprise automation. Access is rolling out to cyber-defence partners first, with paid API customers promised it as soon as possible, so it is listed here on the strength of independent results rather than anything you can build on today. The announced introductory price is aggressive for a model at this level.
Where it shines
- First on the arena leaderboard as of 8 October
- Leads Google's published coding and automation benchmarks
- An introductory price of two dollars in and ten out is low for this tier