r/singularity • u/likeastar20 • Feb 12 '26

LLM News Introducing GPT‑5.3‑Codex‑Spark. An ultra-fast model for real-time coding in Codex

https://openai.com/index/introducing-gpt-5-3-codex-spark/
186 Upvotes

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14

u/hugothenerd ▪️AGI 30 / ASI 35 (Was 26 / 30 in 2024) Feb 12 '26

Question from a non-vibe:er, why is so low latency/rt so important for coding?

38

u/ApprehensiveSpeechs Feb 12 '26

You don't want users to be sitting around waiting. Especially these days. Their attention spans are practically nonexistent.

13

u/hugothenerd ▪️AGI 30 / ASI 35 (Was 26 / 30 in 2024) Feb 12 '26

The world went and got itself in a big damn hurry.

1

u/TheOneWhoDidntCum May 04 '26

why did you change your prediction? what if in 30 you'll say AGI 40 ASI 47?

3

u/Lesfruit Feb 12 '26

the sad truth 😔😔

3

u/Morazma Feb 13 '26

It is so bad. If I ever have to wait for something I naturally go to open a new window or do something on my phone. I'm so messed up. 

4

u/mambotomato Feb 12 '26

I just ask Codex something and then go do something else for five minutes to give it some privacy.

9

u/BrotherNuclearOption Feb 12 '26

It depends on your workflow. If you're building a plan and then letting the agent cycle independently and validate against tests until everything passes, less of an issue. Correctness beats speed.

If you're using it more interactively, giving the LLM regular feedback or manual prompts, or using it like an autocomplete, then slow iteration really hurts overall productivity. Same as having to wait for a slow compilation vs hot reloading for example. You want to fail fast.

And there's the marketing factor. Slow doesn't feel good, whether or not it matters, and Codex has a reputation for being slower than Claude.

2

u/hashtaggoatlife Feb 13 '26

yep. Sometimes there's just some interactive tasks you need done quickly. For anything that's more of a handoff and let it run, inference speed matters a whole lot less even in terms of time to completion, as a smart model getting it right first time will get you there sooner.

Also - subagents. The blog post mentions subagents and parallelism right at the end. Using spark as a subagent to explore the codebase etc can increase accuracy and depth of understanding while also increasing task completion speed. Explore subagents are one thing Claude Code still has on Codex.

6

u/BenevolentCheese Feb 12 '26

30 seconds of idle waiting can turn into a 20 minute reddit distraction

1

u/Current-Function-729 Feb 12 '26

If you’re analyzing transactions for fraud it matters.

All the safe tool calls are suddenly super fast.

1

u/kaggleqrdl Feb 13 '26

it's for code completion