Model comparison
DeepSeek V4 Flash Base vs Grok 4.20
Head-to-head evidence from 0 shared benchmark results across 0 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: DeepSeek V4 Flash Base unranked (Not scored); Grok 4.20 #88 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. DeepSeek V4 Flash Base and Grok 4.20 share 0 comparable benchmark results. 1 of 8 categories are comparable. 24 results are unique to DeepSeek V4 Flash Base; 18 to Grok 4.20.
Updated July 23, 2026- Shared results
- 0
- DeepSeek V4 Flash Base only
- 24
- Grok 4.20 only
- 18
- Comparable categories
- 1 / 8
Treat this as a split decision. DeepSeek V4 Flash Base makes more sense if you would rather avoid the extra latency and token burn of a reasoning model; Grok 4.20 is the better fit if reasoning is the priority or you need the larger 2M context window.
Confidence note. This is a partial-evidence comparison with 0 shared benchmark results across 0 evidence categories; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
DeepSeek V4 Flash Base and Grok 4.20 finish on the same BenchAlign overall score, so this is less about a single winner and more about where the edge shows up. The BenchAlign headline says tie; the benchmark table is where the real choice happens.
Grok 4.20 is the reasoning model in the pair, while DeepSeek V4 Flash Base is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. Grok 4.20 gives you the larger context window at 2M, compared with 1M for DeepSeek V4 Flash Base.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | DeepSeek V4 Flash Base | Grok 4.20 | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | DeepSeek V4 Flash BaseNot available | Grok 4.20$2 input / $6 output | A complete price comparison is not available. |
| Generation speedtokens per second | DeepSeek V4 Flash BaseNot available | Grok 4.20233 tok/s | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | DeepSeek V4 Flash BaseNot available | Grok 4.2010.33 s | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | DeepSeek V4 Flash Base1M | Grok 4.202M | Grok 4.20 lists the larger context window. |
Benchmark Deep Dive
Agentic3 benchmarks
Coding6 benchmarks
ReasoningGrok 4.20 wins7 benchmarks
Knowledge16 benchmarks
| Benchmark | DeepSeek V4 Flash Base | Grok 4.20 | Result |
|---|---|---|---|
| AGIEvalSource | 82.6% | — | Not comparable |
| MMLUSource | 88.7% | — | Not comparable |
| MMLU-ReduxSource | 89.4% | — | Not comparable |
| MMLU-ProSource | 68.3% | — | Not comparable |
| MMMLUSource | 88.8% | — | Not comparable |
| C-EvalSource | 92.1% | — | Not comparable |
| CMMLUSource | 90.4% | — | Not comparable |
| MultiLoKoSource | 42.2% | — | Not comparable |
| SimpleQASource | 30.1% | — | Not comparable |
| SuperGPQASource | 46.5% | — | Not comparable |
| FACTS ParametricSource | 33.9% | — | Not comparable |
| TriviaQASource | 82.8% | — | Not comparable |
| GPQA-DSource | — | 88.5% | Not comparable |
| HLE w/o toolsSource | — | 31.6% | Not comparable |
| HealthBench HardSource | — | 20.3% | Not comparable |
| MedXpertQA (Text)Source | — | 50.2% | Not comparable |
Math3 benchmarks
Multilingual1 benchmarks
| Benchmark | DeepSeek V4 Flash Base | Grok 4.20 | Result |
|---|---|---|---|
| MGSMSource | 85.7% | — | Not comparable |
Frequently Asked Questions (2)
Which is better, DeepSeek V4 Flash Base or Grok 4.20?
DeepSeek V4 Flash Base and Grok 4.20 are tied on the BenchAlign overall score, so the right pick depends on which category matters most for your use case.
Which is better for reasoning, DeepSeek V4 Flash Base or Grok 4.20?
Grok 4.20 has the edge for reasoning in this comparison, averaging 53.3 versus 44.7. DeepSeek V4 Flash Base stays close enough that the answer can still flip depending on your workload.
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