OpenAI Luna

“For lightweight/daily driver tasks, Gemini Flash 3.8, DeepSeek Flash, and Luna are still up there as favorites.”

“Being able to directly distill their huge frontier models into Luna/Haiku-level models puts them a step ahead still.”

“Luna and in general, smaller models, will struggle to understand the intent and complexities behind human language.”

“if the task is simple enough that they do come out cheaper than Sol, I can switch to Luna and come in even cheaper”

“Luna 6 and now Haiku 5.5 are both very competitive if not better on all axes that we care about”

“Luna is not really the fastest. You need to use it in high/max to get the good output for what it is good for: summarizing.”

“You can get 99% of jobs and work done with Haiku/Luna in a collaberating working enviroment.”

“3 times more expensive at twice the latency with lower performance is a tough sell”

“Luna is SO MUCH cheaper that even if it spends 30K overhead in context its still much less costly”

“It imported the library and wrote spaghetti if-statement soup to get it to work.”

“Sol was a lot happier with what Terra produced and would find far fewer issues than what was implemented by Luna.”

“Narrowing down what a smaller model like Luna needs to look for / care about helps them do better work”

“An excellent model and still usually better value per dollar than Gemini if you pay for API tokens”

“Luna xhigh can achieve similar scores on the evals, but it takes noticeably longer.”

“Luna is that but worse so if you account for things like going down wrong paths”

“is ridiculously cheap @ $0.2/$1.2, easily accessible, and more than good enough for basic use cases”

“I've had Luna take shortcuts (like adding an overload to methods whose signature it changed”

“I moved over to luna since it's comparable speeds and cost for a lot more intelligence.”

“Luna saw a huge jump after the price cut and is one of the more competitive models at the new price on openrouter.”

“the electricity it costs to run on a 3090 is not negligible, so that it's cheaper to use Luna high via API”

“Having a great time with Luna lately, even on Low reasoning effort, which I wasn't expecting at all.”

“We've literally saved tens of millions already by switching to Luna for many workloads at my company.”

“Luna is very usable. I've plugged it into the slot I used to have GLM 5.2 in; I think it's just as good.”

“Both super fast, super cheap, and I have not felt need for anything more capable in few weeks.”

“Luna is cheap and is at DSV4F level, but it's not capable of advanced reasoning.”

“When I run a task across Sol, Terra, and Luna, I get variations of the same thing with diminishing quality.”

“Luna is so extremely cheap and cranked up to max it does anything I'd want Terra to do for a fraction of the cost”

“they’re quite slow (OAI seems to be really slow lately) and don’t have the reasoning traces”

“there are many models like deepseek v4 flash and luna that are both cheaper and way better than most other models”

“Luna has actually been my favorite coding model that predictably just works at boring dev tasks.”

“It's also pretty cheap if you're paying for it (for coding). But I don't quite trust it for anything complicated”

“I've been driving Luna xhigh in CoPilot CLI since it was released as my daily driver. Good reasoning, no problems with tool calls.”

“In my real world use Luna is as useful to me as Sonnet. And it gets stuff done faster and follows my instructions more closely.”

“Luna's now cheaper than 5.4-nano (for output tokens). That's a significant improvement.”

“Luna is good as an end user model for simple tasks like classification, but not as a coding model.”

“I use Luna a lot (over 1T tokens since it came out) and I'd rank Luna (high/xhigh) on par with Sonnet 5, without hesitation.”

“Luna is the most impressive model released so far by any provider. It's perfect for doing all the low-level tool calling and developing hypotheses.”

“Luna respect AGENTS.md and even refuse to mark a task slice completed without testing because i wrote this as rule.”

“Luna 5.6 xhigh scores within the margin of error the same as Opus 4.8 max on DeepSWE for 8x cheaper”

“Luna looks quite interesting though, happy to see OpenAI still serving the more budget-oriented side of the market”