Grok 4.20 (Reasoning) vs DeepSeek V4 Pro
Side-by-side comparison across metrics, pricing, and overall score — every value traced to a source.
Verdict: DeepSeek V4 Pro ranks highest overall (#4) with a score of 51.8.
The best choice still depends on which metrics matter for your workload — per-metric winners are marked below.
What the numbers hide
Computed from the published values below — no estimates, no generated claims.
Fragile verdict
The overall winner flips to Grok 4.20 (Reasoning) if Context Window is weighted at 100% (it counts for 18% today). If context window drives your decision, the ranking above may not be your ranking.
What nobody reports
SWE-Bench Pro Score (1 of 2 missing) — the questions worth asking vendors directly.
AI hot take
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| Metric | Grok 4.20 (Reasoning)xAI | DeepSeek V4 ProDeepSeek |
|---|---|---|
| Overall OptiSift Score | 31.6#12 | 51.8#4 |
| Input Price | $1.25 | $0.44 |
| Output Price | $2.5 | $0.87 |
| Cache Read Price | $0.2 | $0 |
| Context Window | 1M | 1M |
| Max Output Tokens | 30K | 384K |
| SWE-Bench Pro Score | — | 18% |
| Tool Calling | Yes | Yes |
| Extended Reasoning | Yes | Yes |
About these models
#12Grok 4.20 (Reasoning)
xAI
Grok 4.20 (Reasoning) is xAI's reasoning-capable model: $1.25/$2.50 per 1M input/output tokens, 1M token context window.
#4DeepSeek V4 Pro
DeepSeek
DeepSeek V4 Pro is DeepSeek's reasoning-capable model: $0.43/$0.87 per 1M input/output tokens, 1M token context window, 18% on SWE-Bench Pro.