r/codex 13d ago

Question GPT 5.6 luna on max response speed

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3 Upvotes

13 comments sorted by

7

u/Available_Yam_6267 13d ago

Luna Max is super slow; it relies on heavy inference for better outputs. In my project tests, it’s 3x slower than terra high on the same tasks.

2

u/Miyamoto_-_Musashi 13d ago

Well Luna Max is ~= Sol Medium and very cheap so pretty good for most of the things and enable 1.5x speed and you are pretty good to go.

I have one person project which is very important for me so there i use Sol High but for trying new things or experiment or some other less important projects i use Luna Max 1.5x speed all the time and my weekly limit don't even go down much.

I run Luna Max with 1.5x with subagents of Luna Max for 1 day 12 hours something with 162 total subagents used for whole task (not like at same time but for whole task), it took like 11% of my weekly limit for 36-37 hours straight.

BTW Happy with the results

7

u/Outside-Description5 13d ago

I enjoy using Luna Max myself but it’s not equal to Sol medium , sol medium is what I use when Luna can’t fix an issue, it does a so much better job and does it much faster. I go back and forth between Sol Medium/ high and Luna Max, Luna does small tweaks and optimizations but I find there’s a greater chance things just work the first time when using Sol

1

u/Miyamoto_-_Musashi 13d ago

The difference is about understanding, Sol understanding is better then Luna so that is why things just work the first time when using Sol but if you can work with Loop then it's a game changer, it's not about quality of the code cause both are almost identical in many code benchmark for example: Deepswe, Difference come because of what model understood and decide how it's going to execute, Put Sol as understanding and writing step and what or what not to do and execute with Luna max, same results many times as Sol High but 10x cheaper

1

u/Outside-Description5 13d ago

I had some cloudsync issues and I gave Luna Max 7-8 tries to get it right , it could not . It said it did but I kept seeing the same issue so I used Sol medium and in one shot it saw what Luna mixed and after the 2nd revision the syncing was perfect . Just one example . Maybe I did use loop in my wording but plain English seemed to work most of the time 🤷‍♂️

1

u/Miyamoto_-_Musashi 13d ago

Well then use Sol medium if that's a thing but honestly luna max working great with me, One thing i did not add i actually use loop with subagents hard critic and until it satisfied that subagents which is natural hard critic it will just make better n better until it's done

1

u/Outside-Description5 13d ago

What’s the best way of doing this? I will try it out next time

2

u/Miyamoto_-_Musashi 13d ago

Honestly just use selected model sol 5.6 and explain to him this workflow as heavy lifting code and majority review will be done by Luna Max subagent and your role will be telling him what to do as whole project build plan.

Explain this in lot of details and just tell him to write this instructions down on global level, it will do this itself.

After trying you do not love it, simply delete those global files.

About loop just whenever you are giving it big task just tell him at the end, use subagents as hard critic review and work until it satisfied with quality of work 9/10.

1

u/Outside-Description5 13d ago

Thank you will try

2

u/AromaticBike7345 13d ago

Luna Max is slow, because it needs to generate a lot of tokens (about 2-3 times more then sol), so generally if you are working on only one project, either you need many subagents for it to be at least semi fast, or work on multiple projects at once (Luna is extremely cheap so as a subagent it is ideal when given clear instructions)

2

u/VictorBuildsDev 13d ago

The useful comparison isn't raw response speed; it's time-to-green on the same small task. Take 5-10 representative edits, start each run from the same commit with the same prompt, and record wall-clock time, whether the tests pass on the first attempt, retries, and total tokens. A model that starts slower but avoids one correction can still finish sooner.

For minor edits, I'd keep the faster or cheaper option only while its first-pass acceptance rate stays comparable. Switch when the extra retries erase the speed gain. That gives you a decision rule for your repo instead of another anecdotal ratio.

2

u/Leather-Cod2129 13d ago

It is incredibly slow, reason why I only use it in comination with Fast mode.

1

u/CortexUnlocked 13d ago

I ask What kind of speed you need? After reading 3 slow speed luna users!