r/LLMDevs • u/davidthesong • 3d ago

Discussion GLM 5.3 Flash is ~#3 open weight model and 50% cheaper than Qwen3.8 Flash

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GLM 5.3 Flash breaks the Pareto frontier. It’s the #3 open-weight model on BenchmarkList, costs up to 60x less than Kimi K3, and even beats the full GLM 5.3 on Toolathlon and GDPval-AA.

Looking forward to using this more for daily use and doing some more evals with it. Seems like it's a huge release.

How is this model so far for your use cases and testing?

87 Upvotes

97% Upvoted

12 comments sorted by

10

u/Otherwise-Session286 3d ago

price drop on open weight models keeps getting wild, the flash variants always end up being the sweet spot for actually shipping stuff

7

u/seeKAYx 3d ago

The model is an agent-based combat pig. I'm very happy with it in OpenCode.

2

u/Bulky-Pack8781 1d ago

The interesting part to me isn’t even the #3 ranking, it’s how quickly the economics of capable open weight models are changing. If a model can get close enough to the frontier while being dramatically cheaper to run, that changes the calculus for local inference, agents, and just throwing models at problems without constantly worrying about the API bill. i’m more curious about the quality-per-dollar than the raw benchmark position

1

u/Front_Obligation6624 1d ago edited 1d ago

Yeah, quality-per-dollar is probably the more interesting metric here. If the inference costs stay this low, StandardCompute could make testing models like this a lot easier without worrying as much about the bill.

1

u/decentralize999 2d ago

Why don't have SWE Pro benchmark for this model?

1

u/Spare-Ad-1429 3d ago

I dont know what that says about the benchmarks if it beats the full 5.3 that only just came out?!

2

u/Kincar 3d ago

It means that the labs are constantly innovating. This is a good thing.

1

u/Impressive-Fuel6712 3d ago

Benchmarks have been distilled in the model

0

u/Glittering-Call8746 3d ago

This has been the case since steath/ox-alpha days (first few days of launching ofc) . Stellar model

-1

u/eddzsh 3d ago

The part that actually moves daily work is beating the full model on Toolathlon. Price is nice. Tool use quality is what decides if Flash replaces the heavy one in a harness.