Apex Matches Frontier Scores at Lower Cost but Overthinks, Says Aiden Bai
aidenybai · x · 2026-10-14
Aiden Bai says Apex scores comparably with frontier models but is slightly prone to overthinking, and recommends it for frontend developers who find Claude/Codex too expensive. The attached Arena ReactBench scatter chart shows Apex at roughly 36% score at $1.3 average rollout cost, alongside Opus 5, Fable 5.1, and GPT 5.6 variants.
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