Working Notes on Agent Systems/Brad Zhang

@teach_fireworks / X longform

Grok4 is free! Just a few days after GPT5 went online, this was a direct business showdown between Musk and

Grok4 is free! Just a few days after GPT5 went online, this was a direct business showdown between Musk and Ultraman. The business war has always been so unpretentious....

August 11, 2025 · 2 min read

Grok4 is free! Just a few days after GPT5 went online, this was a direct business showdown between Musk and Ultraman. The business war has always been so unpretentious. Your opponent will not invest resources in a war of attrition when your momentum is strong. A surprise attack is the most advantageous strategy. When will the raid take place? GPT5 was not as good as expected, and GPT 4.5 and 4o had to return. At this time, both the outside and the inside of GPT were confused and confused. Musk's choice of Grok4 for free at this time is equivalent to doing a wave of free marketing on GPT. After all, Grok will be forgotten if it loses its voice. At the same time, I discovered an interesting thing: Nowadays, if a large model does not have any action or big news within three months, it will be quickly forgotten by users spoiled by various AIs. Regardless of whether you use a certain large model or AI product, you have to have something new every week like a short video, and then different new things provide a short-term dopamine, and then proceed to the next round. I don’t know what this counts. It’s not a good thing, but that’s how it is now. Anyway, Grok4 is free, and some excellent open source models such as Qwen3 and GLM4.5 are getting stronger and stronger. I believe that the price of large model APIs will continue to decrease. I don’t know if the scaling low of large models has peaked, but the price of large model APIs has continued to decline visibly to the naked eye. This has laid the foundation for a new stage in which AI agent usage is now hundreds of times greater than in the past, and is a signal of the AI ​​​​agent 2.0 era.

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FORMATTOPICCAPABILITYMARKETcoverscoverssignalssignalssignalssignalsFORMATlongform noteTOPICagentsTOPICtoolingCAPABILITYagent workflowCAPABILITYdeveloper toolingCAPABILITYproduct surfaceMARKETopen-source builders
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Grok4 is free! Just a few days after GPT5 went online, this was a direct business sho...THESISGrok4 is free! Just afew days after GPT5went online, this wasa direct businessSIGNALGrok4 is free! Just afew days after GPT5went online, this wasa direct businessOPERATORGrok4 is free! Just afew days after GPT5went online, this wasa direct businessIMPLICATIONGrok4 is free! Just afew days after GPT5went online, this wasa direct business
Mermaid outline
flowchart LR
  thesis["Grok4 is free! Just a few days after GPT5 went online, this was a direct business showdown between Musk and..."]
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  operator["Grok4 is free! Just a few days after GPT5 went online, this was a direct business showdown between Musk and..."]
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  thesis -->|frames| signal
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