RTL-BenchLS - Round-Trip NL Spec (r=1.0): leaderboard
Metric: Functional pass rate (%) on round-trip reasoning on 420 designs (slice 1 of RTL-BenchLS): the model compresses a Verilog design into an intermediate abstract, then regenerates the RTL from its own abstract, the abstract a natural-language specification at most as long as the design; functional pass rate (%; output formally equivalent to the golden design, Cadence Conformal LEC for combinational and JasperGold SEC for sequential designs), temperature 0.2; higher is better. Source: arxiv.org. Saturation forecast: Around 2029. 8 models tracked.
Top models
| # | Model | Score |
|---|---|---|
| 1 | Claude Sonnet 4.5 | 23.1 |
| 2 | DeepSeek V3.2 | 19.5 |
| 3 | Claude Haiku 4.5 | 18.6 |
| 4 | GPT-4o | 16 |
| 5 | GPT-4o Mini | 14 |
| 6 | Qwen 3.5 397B A17B | 5.2 |
| 7 | Llama 3.3 70B Instruct | 2.6 |
Interactive version: theaggregate.ai/benchmark?slug=rtl-benchls-round-trip-nl-spec-r-1-0 · How It Works · Data refreshed daily, snapshot 2026-09-29.