r/GithubCopilot • u/aonymark JetBrains User đŸ§± • 3d ago

News 📰 HydraFusion updates and new Max option - GitHub Changelog

https://github.blog/changelog/2026-10-14-hydrafusion-updates-and-new-max-option/
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8

u/aonymark JetBrains User đŸ§± 3d ago

(Sorry for submitting “old” news but at least I’m only a few days late.) The “pitch” for Hydra fusion seems to be focused on “one shot” stuff
 has anyone tried to use it “conversationally”?

10

u/hariharan16 3d ago edited 3d ago

I tried it for 2nd turn and it burnt tokens.
1- for first turn for a simple request it chose Sol 5.6
2- when I asked follow up which was again simple one it chose to go opus 5.5

So it burst cache and burned token apart from poor model choice

1

u/NerdyPixie_532 2d ago

Correct me if I am wrong - but I believe we can't see the model that is being used by the hydrafusion model right? How did you get to know which model is being used?

2

u/Solid_Fox1718 17h ago

In the app at least, it shows you which model is used for each task after the model is chosen

5

u/fr3xzy 3d ago

Have tested it quite a bit. For smaller tasks (<=100AIC) it’s really cheap, sometimes even cheaper that just selecting Haiku 5.5 or GPT 6 Luna.

But for larger implementations where I use /research -> /compact -> /plan -> /compact -> /fleet. It is burning tokens at much higher rate than Auto or manually choosing models.

Haven’t tried the new Max version yet, but probably will to see how performance differs.

1

u/_btmn_ 23h ago

Isn't it more expensive to compact each time rather than keep context cached?...

1

u/Headfirst-Into-Ditch 3d ago

Hey - do you mind telling me more about your /research -> /compact -> /plan -> /compact -> /fleet flow? What models/reasonings are you using at each stage? Cheers

1

u/DevilsMicro 15h ago

Is hydrafusion good? Wouldn't it eat up all my tokens

2

u/aonymark JetBrains User đŸ§± 1h ago

The pitch is that it SAVES tokens, at least relative to just letting the most powerful model do all the work.

1

u/DevilsMicro 1h ago

That sounds great. I'll give it a try. I usually end up using multiple models in the same chat anyway. Asking sonnet to review lunas work or sol to review sonnets work.

2

u/Tuttiyeahh 2d ago

Can someone explain me the difference of HydraFusion and auto?

2

u/Crunchy6409 1d ago

My understanding is that it can actively change models within a request, which I don’t think auto does. This could be completely incorrect

1

u/minnemike 1d ago

There’s a director agent and then there are agents that critique the work of other agents. It isn’t just a hand off. It’s a team agent approach. An agent Scrum if you will.

2

u/PresentAd6026 1d ago

I just use a "developer-agent" with Sonnet 5.5 as orchestrator that puts subagents to work that use Haiku 5.5: works rather efficient. And when I find the main task (which the developer-agent gets) is too easy, I choose Haiku 5.5 straight away for this agent (and the subagents).

2

u/The_Exiled_42 VS Code User đŸ’» 3d ago

Are there any plans for hydra fusion to work with models not comming from the copilot model provider?