| 1. Claude Opus 5 (High) |
| 2. Claude Opus 5 (Max) |
| 3. Claude Fable 5 (High) |
| 4. GPT 5.6 Sol (xHigh) |
| 5. Claude Opus 4.8 (High) |
The BriefZ.ai released GLM-5.3-Flash, a top-tier AI model anyone can download free and use in commercial work under the MIT license, one of the most permissive licenses there is. It turned out to be 'Ox Alpha', the mystery model that quietly topped the free-model charts for a week before Bloomberg confirmed who made it. Why it matters: near-frontier AI is now close to free, so the price floor for every AI feature you buy or sell just dropped again.
Level UpThis week, take the hardest coding or summarizing prompt you actually use and run it on GLM-5.3-Flash next to your current model. If the cheap one clears your bar, that job just got about ten times cheaper. The launch analysis below has the spec sheet and prices side by side, and the half-off launch price runs through September 9. GLM-5.3-Flash launch analysis: specs, real pricing, and how it stacks up