ReactBench v1 ranks GPT-5.6 at about 53% and Opus 5 at 49% on realistic React tasks

aidenybai · x · 2026-07-28

ReactBench v1 is presented as an evaluation for coding agents on realistic React work. Its authors argue that models can pass standard benchmarks yet still ship React code that fails in production because those tests miss performance, accessibility, and quality issues.

The benchmark ranks several providers and models by pass@1. The screenshot shows GPT-5.6 Terra/Sol leading around 53%, followed by Anthropic Opus 5 at 49%, then Fable 5, Grok 4.5, Kimi K3, GLM 5.2, and others. The page also plots score against rollout cost, highlighting the trade-off between quality and compute spend.

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