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  • For anyone else looking for the pricing: https://platform.stepfun.ai/docs/en/guides/pricing/details#p...
    by Jacques2Marais
  • GLM-5.3 and Kimi K3 are just below where I can use them to completely replace frontier models. Oddly,* SWE-2 is there for me.

    If this performs similarly in the real world, we're approaching a level of capability where for most devs, it only makes sense to pay for Anthropic or OpenAI subscriptions if they are heavily subsidized and actually cheaper than these alternative options.

    * Oddly, because I perceived Devin as being kind of a joke before trying SWE-2.

    by InsideOutSanta
  • The previous Step models were pretty decent, but unfortunately for them, their model reasons too much and too long and the Qwen/Kimi/DeepSeek/GLM have been stronger. Hopefully this doesn't reason too long to get to the answer. I welcome any open model, the more the merrier.
    by segmondy
  • 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.
    by ghoshbishakh
  • IT's Artificial Analysis Index is the same as Kimi K3, which is about 4.6x bigger, and GLM 5.3, which is about 1.25x bigger. Pricing is $1/$2.70 i/o. Openweights on October 15.
    by garo-pro
  • > 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.

    by bethekind

  •   > 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.
    by nh43215rgb
  • In their first demo video, to make a 3D render of the photo, the thinking trace gives away the game:

    > Interesting! It turns out there's already an existing project here [...] The project is fully built [...]

    I'm always astounded how little effort is put into checking the AI answers displayed in these announcements. Back when I paid more attention, I remember OpenAI's and Google's demos constantly showed their AIs giving wrong answers.

    by BoppreH

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