GPT-6.1 Sol vs GPT-6 Astra

The two side by side on the four things we rate, using public benchmark data. Every score links to its source on each model's page.

Ratings for GPT-6.1 Sol and GPT-6 Astra
What we rate	GPT-6.1 Sol	GPT-6 Astra
Writing writing votes	Middle 54th of 77 listed	Middle 57th of 77 listed
Coding coding votes	Strong 37th of 77 listed	Strong 33rd of 77 listed
Maths hard maths problems	Top tier 1st of 43 listed	Top tier 1st of 43 listed
Knowledge short factual questions	Top tier 3rd of 43 listed	Top tier 2nd of 43 listed

GPT-6.1 Sol ranks higher on writing. GPT-6 Astra ranks higher on coding and knowledge. They rank level on maths. A few places apart can sit inside the margin of error, so open the full comparison to see the ranges. We do not pick an overall winner: the better choice depends on the job.

Open the full interactive comparison Find my AI

GPT-6.1 Sol

By OpenAI. Full profile and sources

Good at

Coding: Strong (37th of 77 listed models)
Knowledge: Top tier (3rd of 43 listed models)
Maths: Top tier (1st of 43 listed models)
Relatively stronger on Expert-level prompts: 26th of 77, against 53rd overall

Not so good at

Writing: Middle (54th of 77 listed models)
Closed weights: only its maker and chosen partners can offer it

Can't tell yet

Fixing real software bugs: Not enough data

Where it is one of our picks

Homework and maths: best-supported choice.
Research and checking facts: good-enough alternative.

Price: Verified: ChatGPT Plus GBP 20.00 a month (checked 29 Oct 2026); ChatGPT Pro (from) GBP 89.00 a month (checked 29 Oct 2026)

GPT-6 Astra