Side-by-side sourced facts
Both columns quote the same reviewed Epoch AI catalog artifact. The LMArena row quotes the separately pinned snapshot published July 12, 2026 and appears only for an exact source model match. Missing values stay missing.
| Field |  DeepSeek-V4-Pro |  Grok 4.1 |
|---|---|---|
| Developer | DeepSeek | xAI |
| Released | April 24, 2026 | November 17, 2025 |
| Domains | Language | Language |
| Tasks | Language modeling/generation, Question answering | Language modeling/generation, Question answering, Mathematical reasoning, Quantitative reasoning, Code generation |
| Access | Open weights (unrestricted) | API access |
| Weights | Open weights | Closed weights |
| LMArena rating | 1457.1 (95% interval 1452.6 to 1461.6, 41,800 battles) | No exact model match in this snapshot |
| Context window | Not reported by this source | Not reported by this source |
| Price | Not reported by this source | Not reported by this source |
Common questions
Is DeepSeek-V4-Pro better than Grok 4.1?
No published ranking covers both models in Model Gauntlet's approved sources: the LMArena snapshot published July 12, 2026 has no exact match for Grok 4.1. The Epoch catalog documents what each model is for; it does not measure which is better.
Which is newer, DeepSeek-V4-Pro or Grok 4.1?
According to Epoch AI's model catalog (retrieved July 14, 2026), DeepSeek-V4-Pro is newer: it was released April 24, 2026, while Grok 4.1 was released November 17, 2025.
Can you self-host DeepSeek-V4-Pro or Grok 4.1?
Only DeepSeek-V4-Pro, according to the Epoch records: it ships unrestricted open weights, while Grok 4.1 is a closed-weight model with API access only.
Evidence boundary
This page declares no winner beyond what a named source's numbers say. Where the sources do not overlap, the page says so plainly. Task quality, price, context window, latency, and reliability are not reported by these sources, so no claim about them appears here. Both models still require hands-on evaluation on your own workload.