DeepSeek Chat (R1-based) and Grok‑1.5 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Grok‑1.5 shipped 297 days before DeepSeek Chat (R1-based), so benchmark comparisons should account for the intervening progress.

DeepSeek Chat (R1-based) is open weight, while Grok‑1.5 is proprietary.

Direct benchmark comparisons are unavailable — DeepSeek Chat (R1-based) and Grok‑1.5 don't publish scores on any of the same benchmarks.