Model comparison
DeepSeek V4 Flash Base vs DeepSeek V4 Pro Base
Head-to-head evidence from 24 shared benchmark results across 5 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Sibling matchup inside the DeepSeek V4 family.
Evidence parity. DeepSeek V4 Flash Base and DeepSeek V4 Pro Base share 24 comparable benchmark results. 2 of 8 categories are comparable. 0 results are unique to DeepSeek V4 Flash Base; 0 to DeepSeek V4 Pro Base.
Updated July 23, 2026- Shared results
- 24
- DeepSeek V4 Flash Base only
- 0
- DeepSeek V4 Pro Base only
- 0
- Comparable categories
- 2 / 8
DeepSeek V4 Flash Base makes more sense if you want this variant’s specific profile, while DeepSeek V4 Pro Base is the cleaner fit if knowledge is the priority.
Confidence note. This is a partial-evidence comparison with 24 shared benchmark results across 5 evidence categories; 2 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 DeepSeek V4 Pro Base sit in the same DeepSeek V4 family. This page is less about two unrelated model lineages and more about how the siblings trade off on benchmark shape, token costs, and practical limits like context window.
DeepSeek V4 Flash Base and DeepSeek V4 Pro Base 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.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | DeepSeek V4 Flash Base | Δ | DeepSeek V4 Pro Base |
|---|---|---|---|
| Knowledge | DeepSeek V4 Flash Base56.4 | Margin→ 10.0 | DeepSeek V4 Pro Base66.4 |
| Reasoning | DeepSeek V4 Flash Base44.7 | Margin→ 6.8 | DeepSeek V4 Pro Base51.5 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
SimpleQA
KnowledgeA 30.1%B 55.2%Winner: DeepSeek V4 Pro BaseΔ 25.1SimpleQA: DeepSeek V4 Flash Base scored 30.1%; DeepSeek V4 Pro Base scored 55.2%. DeepSeek V4 Pro Base wins this benchmark. - Source ↗
SuperGPQA
KnowledgeA 46.5%B 53.9%Winner: DeepSeek V4 Pro BaseΔ 7.4SuperGPQA: DeepSeek V4 Flash Base scored 46.5%; DeepSeek V4 Pro Base scored 53.9%. DeepSeek V4 Pro Base wins this benchmark. - Source ↗
LongBench v2
ReasoningA 44.7%B 51.5%Winner: DeepSeek V4 Pro BaseΔ 6.8LongBench v2: DeepSeek V4 Flash Base scored 44.7%; DeepSeek V4 Pro Base scored 51.5%. DeepSeek V4 Pro Base wins this benchmark. - Source ↗
MMLU-Pro
KnowledgeA 68.3%B 73.5%Winner: DeepSeek V4 Pro BaseΔ 5.2MMLU-Pro: DeepSeek V4 Flash Base scored 68.3%; DeepSeek V4 Pro Base scored 73.5%. DeepSeek V4 Pro Base wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | DeepSeek V4 Flash Base | DeepSeek V4 Pro Base | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | DeepSeek V4 Flash BaseNot available | DeepSeek V4 Pro BaseNot available | A complete price comparison is not available. |
| Generation speedtokens per second | DeepSeek V4 Flash BaseNot available | DeepSeek V4 Pro BaseNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | DeepSeek V4 Flash BaseNot available | DeepSeek V4 Pro BaseNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | DeepSeek V4 Flash Base1M | DeepSeek V4 Pro Base1M | Listed context windows are equal. |
Benchmark Deep Dive
Coding2 benchmarks
ReasoningDeepSeek V4 Pro Base wins6 benchmarks
| Benchmark | DeepSeek V4 Flash Base | DeepSeek V4 Pro Base | Result |
|---|---|---|---|
| BBHSource | 86.9% | 87.5% | DeepSeek V4 Pro Base leads |
| DROPSource | 88.6% | 88.7% | DeepSeek V4 Pro Base leads |
| HellaSwagSource | 85.7% | 88.0% | DeepSeek V4 Pro Base leads |
| WinoGrandeSource | 79.5% | 81.5% | DeepSeek V4 Pro Base leads |
| CLUEWSCSource | 82.2% | 85.2% | DeepSeek V4 Pro Base leads |
| LongBench v2Source | 44.7% | 51.5% | DeepSeek V4 Pro Base leads |
KnowledgeDeepSeek V4 Pro Base wins12 benchmarks
| Benchmark | DeepSeek V4 Flash Base | DeepSeek V4 Pro Base | Result |
|---|---|---|---|
| AGIEvalSource | 82.6% | 83.1% | DeepSeek V4 Pro Base leads |
| MMLUSource | 88.7% | 90.1% | DeepSeek V4 Pro Base leads |
| MMLU-ReduxSource | 89.4% | 90.8% | DeepSeek V4 Pro Base leads |
| MMLU-ProSource | 68.3% | 73.5% | DeepSeek V4 Pro Base leads |
| MMMLUSource | 88.8% | 90.3% | DeepSeek V4 Pro Base leads |
| C-EvalSource | 92.1% | 93.1% | DeepSeek V4 Pro Base leads |
| CMMLUSource | 90.4% | 90.8% | DeepSeek V4 Pro Base leads |
| MultiLoKoSource | 42.2% | 51.1% | DeepSeek V4 Pro Base leads |
| SimpleQASource | 30.1% | 55.2% | DeepSeek V4 Pro Base leads |
| SuperGPQASource | 46.5% | 53.9% | DeepSeek V4 Pro Base leads |
| FACTS ParametricSource | 33.9% | 62.6% | DeepSeek V4 Pro Base leads |
| TriviaQASource | 82.8% | 85.6% | DeepSeek V4 Pro Base leads |
Math3 benchmarks
Multilingual1 benchmarks
| Benchmark | DeepSeek V4 Flash Base | DeepSeek V4 Pro Base | Result |
|---|---|---|---|
| MGSMSource | 85.7% | 84.4% | DeepSeek V4 Flash Base leads |
Frequently Asked Questions (3)
Which is better, DeepSeek V4 Flash Base or DeepSeek V4 Pro Base?
DeepSeek V4 Flash Base and DeepSeek V4 Pro Base are sibling variants in the DeepSeek V4 family, so the right pick depends on whether you value the better benchmark line, cheaper tokens, or the larger context window. They are tied on the BenchAlign leaderboard on the current data.
Which is better for knowledge tasks, DeepSeek V4 Flash Base or DeepSeek V4 Pro Base?
DeepSeek V4 Pro Base has the edge for knowledge tasks in this comparison, averaging 66.4 versus 56.4. Inside this category, FACTS Parametric is the benchmark that creates the most daylight between them.
Which is better for reasoning, DeepSeek V4 Flash Base or DeepSeek V4 Pro Base?
DeepSeek V4 Pro Base has the edge for reasoning in this comparison, averaging 51.5 versus 44.7. Inside this category, LongBench v2 is the benchmark that creates the most daylight between them.
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