Another week, another new model. This time it is GPT Sol 6.1 arriving, so I’ve put it to the test against the current champion GPT Astra 6 and found:

GPT Sol 6.1 beats Astra 6 – https://github.com/directorcia/general/blob/master/Copilot/Comparisons/20260930-Cowork-GPT61Sol-Grok-eval.md

but it is more expensive than Astra 6:

Opus 5.5 = 23,494 credits

GPTSol 6.1 = 10,173 Credits

GPT Astra 6 = 6,067 credits

Fable 5.1 = 3,453 credits

Fable 5 (Preview) = 3,387 credits [Model no longer shown]
Fable 5 (Copilot)(Preview) = 3,373.8 credits [Model no longer shown]

GPT 5.6 Sol = 2,800.50 credits [Model no longer shown]
Sonnet 5 = 2,509.3 credits [Model no longer shown]
Opus 4.8 = 2,487 credits [Model no longer shown]

GPT Sol 6 = 2,243 credits [Model no longer shown]

Opus 5 = 2,240 credits [Model no longer shown]

GPT 5.5 = 1,200 credits
GPT 5.6 Terra = 260 credits [Model no longer shown]

Interestingly, Sol 6.1 generated a 73 page report while Astra 6 was only 35! That’s 2 x the output. Stop and think about that, 73 detailed pages with a single prompt! Amazing!

I also compared it to its predecessor, GPT Sol 6 and found – https://github.com/directorcia/general/blob/master/Copilot/Comparisons/20260930-Cowork-GPT6-61Sol-Grok-eval.md

GPT 6.1 Sol is also the clear winner here as the results show. Again, an amazing improvement jump by my comparison from only Sol 6.0 to Sol 6.1! Where is this going to end?

The summary of the all the outputs produced is here:

https://github.com/directorcia/general/blob/master/Copilot/Comparisons/20260816-File-paramters.md

while the results, including outputs are here:

https://github.com/directorcia/general/tree/master/Copilot/Comparisons

How much better can these models get? We’ll know shortly, I’ll bet.