Claude Opus 4.8 vs Subconscious GLM-5.2

Main takeaways

• GLM-5.2 is open source, which makes this especially impressive. An openly available model going toe-to-toe with a frontier closed model on builds this demanding is a remarkable showing for open weights.
• Both produced similar impressive results. Both models took every prompt and handed back a single working HTML file on the first try, no hand-holding or follow-up edits. Both models show off visually the capabilities of frontier intelligence.
• The cost came out about even. Claude ran $5.15 across all seven, GLM $4.95, basically a wash. GLM was the cheaper pick on the five everyday builds, but was slightly more expensive on the more thought intensive processes.
• GLM was slower to complete the tasks. GLM took around 2-3x as long as Claude.