| ▲ | Step 5 Preview: Advancing the Pareto Frontier(stepfun.com) |
| 49 points by nateb2022 4 hours ago | 15 comments |
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| ▲ | nh43215rgb 2 hours ago | parent | next [-] |
| > Built on a sparse Mixture-of-Experts architecture, Step 5 Preview has 600B total parameters, with 27B active per token, and supports a 1M-token context window and vision input.
> Step 5 Preview scores 44 on the Artificial Analysis Intelligence Index.
> The model will be released with open weights on October 15.
I guess being Chinese company they decided to skip version 4, while also giving impression to be on the similar iteration with leading companies (claude opus 5).
I wonder if other Chinese labs like Kimi/Moonshot will follow suit. |
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| ▲ | JohnsonZou a few seconds ago | parent | next [-] | | Another possible reason is that the number 4 is considered unlucky in traditional Chinese culture. | |
| ▲ | Bolwin an hour ago | parent | prev [-] | | Moonshot has already teased K3.1 so not likely | | |
| ▲ | dannyw 44 minutes ago | parent [-] | | K3.1 would likely be a deeper/longer post-train from K3, so that’d make sense. It’s all marketing anyways, but that’s at least how a lot of labs have been naming things (sometimes). |
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| ▲ | bethekind 2 hours ago | parent | prev | next [-] |
| > Without any Pokémon-specific optimization, Step 5 Preview has so far sustained progress for more than 3,000 turns and 6 million tokens of interaction. By turn 3,082, it had unlocked Cut, earned three Gym Badges, and defeated Lt. Surge. The run is now roughly one-third of the way through the main story. Finally FireRed is being used as a benchmark again! I believe Astra can beat it in 18 hours. Not sure how that compares. |
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| ▲ | ghoshbishakh an hour ago | parent | prev | next [-] |
| Their posisitoning is nice. Instead of saying they are cheaper and a bit less performant (in terms of intelligence), they say they are best among the cheaper and a bit less performant ones. |
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| ▲ | derliebej 10 minutes ago | parent | prev | next [-] |
| How about adding a contested historical facts benchmark? |
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| ▲ | Jacques2Marais 3 hours ago | parent | prev | next [-] |
| For anyone else looking for the pricing: https://platform.stepfun.ai/docs/en/guides/pricing/details#p... |
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| ▲ | sieve 3 hours ago | parent [-] | | I regularly hit 200-300M cached reads every day on some of the models I use. It has exceeded 7-800M on a couple of occasions. At $0.04/M, that is $8-12 per day only for cached reads. | | |
| ▲ | ignoramous an hour ago | parent [-] | | > At $0.04/M Unless you meant step-3.7-flash, the input cache hits are $0.05 per mil for step-5-preview. > $8-12 per day only for cached reads Pretty decent "API" rates for ~500M+ tokens on Step Fun 5, a Kimi K3 / GLM 5.3 level model? Their "Step Plan" is ridiculous, by comparison: ~$60 usage on $6.99/mo; ~$220 on $9.99/mo. https://platform.stepfun.ai/docs/en/step-plan/overview | | |
| ▲ | sieve 3 minutes ago | parent [-] | | Yes, I meant the Flash version. I have used Kimi 2.5 and GLM 5.3 (& 5.3 Flash). Do not need them for what I do outside of spec hardening (basically, a lot of chatting). I tend to know exactly what I want and most of the weaker models are enough to get me there. I have mainly been using MiMo, DeepSeek V4 Flash and MuseSpark Contributor over the last month or so. |
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| ▲ | conception 3 hours ago | parent | prev [-] |
| Huh wonder why they skipped 4? |
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