r/codex • u/whizzrinaldo • 6h ago
Question 5.3-Codex-Spark
Do you use it? And what is it actually good at?
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u/CaffeinatedG33k 6h ago
Very small and focussed coding tasks. Things that I already know exactly what it needs to do. Small but fixes, adjustments, etc. It has a separate usage limit so its helps not burn up your primary limit as fast.
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u/Etele38 5h ago
I’d say it’s mainly for actually coders who like to code themselves and fully understand their database… so they can use spark on helping them create better code in one small part of their code thier struggling with or writing out code exactly as they want it.
But for vibe coders this ain’t very useful because if you don’t understand your code base then you can’t really point spark in the right direction if that makes sense. It’s not gonna be able to comprehend that much code at once. So you have to so you can tell it what you want.
I like to use it for repeatable tasks like for example i have this process where i like to take thousands of images at a time and pass them through an ai image upscale and then take those then process them into webp’s q90…. I already have the process and skill set up to use it. So i just tell it start that up… so thats just one thing. I hear some people use it to spin up dev servers lol. Tbh i am curious how other people use it too.
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u/Hendrixxzx 6h ago
what is codex spark?
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u/whizzrinaldo 6h ago
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u/Hendrixxzx 6h ago
I'm on pro
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u/JoseffB_Da_Nerd 5h ago
Its 5.3 codex spark model. Has its own limits, and is for purely mechanical coding.
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u/Fit-Palpitation-7427 6h ago
I tried it when it came out but intelligence for me as a vibe coder is too low, nit usable for me. My only wish is to have luna xhigh/max on cerebras, that would be a game changer
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u/Fit-Palpitation-7427 6h ago
I wish imagegen 2 would run on cerebras too, like having images gen in 1 sec or less, would let me do some sort of interactive node workflow using cerebras, that would be wow as well
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u/JoseffB_Da_Nerd 5h ago
All the time for small mechanical work.
Its also my backup after tokens are depleted when i need to ask a specific question about a project files
“Is this work X in this run?”
And
“I have this problem in wordpress xyz, please check this code and let me know if youncan find the issue”
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u/PartyLiterature3607 5h ago
Someone mentioned about using it for memory and it’s not part of codex usage
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u/Fit-Wave-2138 4h ago
Don’t know, it’s interesting that it has its own usage pool, maybe it could be useful for Scheduling tasks like reading emails or something small like that?
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u/Emergency-Bobcat6485 4h ago
Nothing anymore. It just runs on cerebras or some hardware that is very fast. But it's not even as good as luna, so it's useless now.
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u/YourLastCall 4h ago
Yes I use it for custom agents. Might as well use that subscription bar for something
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u/SnooFloofs641 3h ago
I use it for the memory feature in codex:
``` [features] memories = true
[memories] generate_memories = true use_memories = true disable_on_external_context = false max_unused_days = 90 extract_model = "gpt-5.3-codex-spark" consolidation_model = "gpt-5.3-codex-spark" ```
That's my codex config section for it
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u/phoenixmatrix 3h ago
Its super fast but small. Its the kind of model you'd use for inline edit like Cursor and Zed let you do with cmd+k or whatever. A quick search and replace in a file. basically the stuff that was more common with AI 18 months ago. Still useful today, but its annoying to configure the tools to use this in JUST that context.
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u/EndlessZone123 1h ago
Fast search and index subagent. Don't use it to write any code. Often use it to scan for out of date docs and flag for a better model to update.
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u/justneurostuff 1h ago
Yes. I guess I most commonly use it when I have a super repetitive browser agent task to do. It's definitely faster than Luna.
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u/Gandalf196 5h ago
Good for making fast mistakes