Compare / head-to-head
DeepSeek V4.1 FlashvsGrok 4.20 Reasoning
DeepSeek V4.1 Flash leads 1 of 1 shared benchmark. DeepSeek V4.1 Flash is 8.9x cheaper per token. Both offer a 1M-token context window.
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
1 – 0
DeepSeek V4.1 Flash leads
Cheaper per token
DeepSeek V4.1 Flash
8.9x cheaper, input + output
Larger context
Tie
both 1M tokens
Provider uptime (30d)
100% · —
DeepSeek · xAI
DeepSeek V4.1 Flash
DeepSeek · released 2026-09-10
textvision
Grok 4.20 Reasoning
xAI · released 2026-03-09
textvision
Quality
Benchmark matrix
1 shared · 2 only DeepSeek V4.1 Flash · 4 only Grok 4.20 Reasoning| Benchmark | DeepSeek V4.1 Flash | Grok 4.20 Reasoning | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 1 | ||||
| GPQA Diamond | 90.9% ↗ | 89.3% ↗epoch | +1.6 pt | DeepSeek V4.1 Flash |
| Only DeepSeek V4.1 Flash reports · 2 | ||||
| DeepSWE v1.1 | 74.2% ↗ | not reported | — | — |
| Terminal-Bench 2.1 | 90.6% ↗ | not reported | — | — |
| Only Grok 4.20 Reasoning reports · 4 | ||||
| FrontierMath Tier 4 v2 (Epoch AI run) | not reported | 17.1% ↗epoch | — | — |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | not reported | 44.9% ↗epoch | — | — |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | not reported | 92.2% ↗epoch | — | — |
| SimpleQA Verified | not reported | 30.2% ↗epoch | — | — |
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is DeepSeek V4.1 Flash minus Grok 4.20 Reasoning in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing
Side by side
Official pricing pages and model cards| Spec | DeepSeek V4.1 Flash | Grok 4.20 Reasoning | Edge |
|---|---|---|---|
| Context window | 1M tokens | 1M tokens | Tie |
| Max output | 384K tokens | — | — |
| Input price / 1M | $0.14 ↗ | $1.25 ↗ | DeepSeek V4.1 Flash |
| Output price / 1M | $0.28 ↗ | $2.5 ↗ | DeepSeek V4.1 Flash |
| Cached input / 1M | $0.003 ↗ | $0.2 ↗ | DeepSeek V4.1 Flash |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $0.42 | $3.75 | DeepSeek V4.1 Flash |
| Modalities | text · vision | text · vision | Tie |
| Released | 2026-09-10 | 2026-03-09 | — |
| Cited benchmark scores | 3 | 5 | — |
Reliability
Provider status
Last 60 days · refreshed daily on this page · live on /statusMore matchups
DeepSeek V4.1 Flash vs …
Models sharing the most benchmarksMore matchups
Grok 4.20 Reasoning vs …
Models sharing the most benchmarksBuilt by Respan
Which one wins on your data?
Public benchmarks are a starting point. Run DeepSeek V4.1 Flash and Grok 4.20 Reasoning on your own prompts with Respan evals, or route to either through one gateway key with automatic failover.