[gertlabs]

In our coding evaluations, we found Sonnet 5 is more capable than Sonnet 4.6 (which was an underrated model itself), but is now faster and slightly cheaper.

Sonnet 5's performance is comparable to GLM 5.2 in both one-shot coding and agentic ability. However, it's about ~20% less verbose than GLM 5.2 in average code submission sizes, and uses fewer reasoning tokens, which reduces the cost gap and suggests it writes cleaner code. In practice, Sonnet 5 ends up being 40% more expensive and ~2x faster than GLM 5.2 in our evaluations (not 300% more expensive as the per-token pricing would suggest). Granted, GLM 5.2 is an extremely reasoning heavy model.

Overall, it's a solid release that gives Anthropic some standing in the price-conscious inference market.

Data at https://gertlabs.com/rankings

[Zababa]

Artificial analysis shows Sonnet 5 as ~2 times more verbose than GLM 5.2. I wouldn't call Sonnet 4.6 underrated, it's in "chinese open source model territory" and unless you rely only on subscriptions it has alternatives.