In 30 seconds
Theo Browne says Ox Alpha, revealed as GLM-5.3-Flash, has become one of his most-used models. He praises its reported performance for its price, multimodal inputs and deployment on Chinese AI chips.
- 1Ox Alpha’s identityTheo says one of his most-used models turned out to be GLM-5.3-Flash.
- 2Performance and priceHe estimates performance comparable to Opus 4.8 at one tenth to one hundredth of the price; this is his assessment rather than a universal benchmark.
- 3Multimodality and chipsTheo highlights image, audio and video inputs and says the model runs on Chinese AI chips.
Takeaways
- Ox Alpha was revealed as GLM-5.3-Flash.
- Theo considers its performance competitive with Opus 4.8 at a much lower price, based on his experience.
- The model accepts image, audio and video inputs and was presented as running on Chinese AI chips.
Read the edited text by chapter
A fast, multimodal model
Theo shares his impressions of GLM-5.3-Flash, previously previewed as Ox Alpha. He discusses performance, pricing, inputs and the hardware used to run it.


Ox Alpha has quickly become one of my most-used models, and I really like using it. The surprise is that it is a Flash model: GLM-5.3-Flash.

In my experience, it behaves on par with models such as Opus 4.8 at one tenth to one hundredth of the price. That is my comparison, not a guarantee that the models perform equally on every task or at every provider’s prices.
The model can take images, audio and video. That stands out to me because I say the non-Flash GLM-5.3 could not even accept a screenshot. The final surprise: the announcement says the Ox Alpha preview ran entirely on Chinese AI chips.
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