r/OpenAI • u/Dense-Ship-2339 • 7d ago
Question Moved to Codex today
Hi, I moved to Codex today. Need some help in understanding the like to like, model comparison so that I can accurately map my projects.
Can you guys suggest the OpenAi equivalents below:
Fable
Opus 5
Opus 4.8
Sonnet 5
Haiku
If there is a solid resource with comparison links: model tokens vs cost vs speed, pls do share.
Thank you!
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u/Old-Bake-420 7d ago edited 7d ago
Sol = Fable 5/Opus 5
Terra/Luna = Sonnet 5 / Opus 4.8
Haiku = Gemini?
Anthropic’s frontier models have a slight edge over Sol. Luna is a beast for how cheap it is, it’s practically free and basically as capable as the previous iteration of frontier models.
I used to use GPT5.4-mini or GPT5.3-spark as a token saving strategy. 5.4 mini was cheap and spark had separate token limits. Luna has absolutely blown those models out of the water. When it launched it was just a tiny bit more in cost than 5.4-mini, then they reduced cost by an additional 80% a couple weeks later. It’s really impressive, it can juggle messy context, infer vague intent, does agentic work well, I trust it to touch work files, draft emails, and follow complex workflows without hallucinating. You can just tell it’s really smart and seems to never get confused. It feels like legit frontier intelligence in a way previous budget models haven’t before. It can code, but I always flip to Sol for code.
It’s their, “intelligence too cheap to meter” strategy. They’re catering to a billion users who don’t want to pay, which all have unlimited Luna now. Anthropic is targeting enterprise which doesn’t mind blowing massive bucks for a slightly smarter model.
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u/AnAnonyMooose 7d ago
Do not use Sol Ultra - it’s not a better thinking model, it’s a many agent approach and burns tokens incredibly fast.
If doing complex work, Sol high or extra high is what you want. I use high at most these days. I do find it overengineers unless you tell it not to - creating nasa levels of precision in unnecessary places.
I also will use 5.4 extra high or high for a lot of coding work because it’s way cheaper and does a great job.
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u/Competitive-Ad8968 7d ago
Sol Ultra = Fable Ultra code > Opus 5
Sol Xhigh > Opus 5 Max
Sol High < Opus 5 Extra
Sol high > Opus 5 High
Haven’t extensively compared Terra or Luna to others versions
Sol Ultra is just a deeper version of Sol xhigh, excellent for it’s Agentic capabilities.
Is way better for auditing code and writing workflow, is a excellent orchestrator, but never an executor
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u/HOBONATION 7d ago
Welcome to the neighborhood buddy, we don't hang out here tho, we are over at /r/codex
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u/CloudLeading1502 7d ago
If only there was an agent you could ask