Model comparison
DeepSeek V4 Flash vs DeepSeek V4 Flash Base
Head-to-head evidence from 2 shared benchmark results across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.
Sibling matchup inside the DeepSeek V4 family.
Public leaderboard positions: DeepSeek V4 Flash #61 (Estimated); DeepSeek V4 Flash Base unranked (Not scored). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. DeepSeek V4 Flash and DeepSeek V4 Flash Base share 2 comparable benchmark results. 1 of 8 categories are comparable. 20 results are unique to DeepSeek V4 Flash; 22 to DeepSeek V4 Flash Base.
Updated July 23, 2026- Shared results
- 2
- DeepSeek V4 Flash only
- 20
- DeepSeek V4 Flash Base only
- 22
- Comparable categories
- 1 / 8
DeepSeek V4 Flash makes more sense if you want this variant’s specific profile, while DeepSeek V4 Flash Base is the cleaner fit if knowledge is the priority.
Confidence note. This is a partial-evidence comparison with 2 shared benchmark results across 1 evidence category; 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 and DeepSeek V4 Flash 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 and DeepSeek V4 Flash 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 | Δ | DeepSeek V4 Flash Base |
|---|---|---|---|
| Knowledge | DeepSeek V4 Flash38.8 | Margin→ 17.6 | DeepSeek V4 Flash Base56.4 |
| Agentic | DeepSeek V4 Flash49.1 | MarginNo overlap | DeepSeek V4 Flash BaseNot measured |
| Coding | DeepSeek V4 Flash64.2 | MarginNo overlap | DeepSeek V4 Flash BaseNot measured |
| Reasoning | DeepSeek V4 FlashNot measured | MarginNo overlap | DeepSeek V4 Flash Base44.7 |
| Math | DeepSeek V4 Flash40.8 | MarginNo overlap | DeepSeek V4 Flash BaseNot measured |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
MMLU-Pro
KnowledgeA 83%B 68.3%Winner: DeepSeek V4 FlashΔ 14.7MMLU-Pro: DeepSeek V4 Flash scored 83%; DeepSeek V4 Flash Base scored 68.3%. DeepSeek V4 Flash wins this benchmark. - Source ↗
SimpleQA
KnowledgeA 23.1%B 30.1%Winner: DeepSeek V4 Flash BaseΔ 7SimpleQA: DeepSeek V4 Flash scored 23.1%; DeepSeek V4 Flash Base scored 30.1%. DeepSeek V4 Flash 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 | DeepSeek V4 Flash Base | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | DeepSeek V4 Flash$0.14 input / $0.28 output | DeepSeek V4 Flash BaseNot available | A complete price comparison is not available. |
| Generation speedtokens per second | DeepSeek V4 FlashNot available | DeepSeek V4 Flash BaseNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | DeepSeek V4 FlashNot available | DeepSeek V4 Flash BaseNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | DeepSeek V4 Flash1M | DeepSeek V4 Flash Base1M | Listed context windows are equal. |
Benchmark Deep Dive
Agentic5 benchmarks
Coding6 benchmarks
| Benchmark | DeepSeek V4 Flash | DeepSeek V4 Flash Base | Result |
|---|---|---|---|
| SWE-bench VerifiedSource | 73.7% | — | Not comparable |
| SWE-bench ProSource | 49.1% | — | Not comparable |
| SWE MultilingualSource | 69.7% | — | Not comparable |
| Terminal-Bench 2.0Source | 49.1% | — | Not comparable |
| BigCodeBenchSource | — | 56.8% | Not comparable |
| HumanEvalSource | — | 69.5% | Not comparable |
Reasoning8 benchmarks
| Benchmark | DeepSeek V4 Flash | DeepSeek V4 Flash Base | Result |
|---|---|---|---|
| MRCR 1MSource | 37.5% | — | Not comparable |
| CorpusQA 1MSource | 15.5% | — | Not comparable |
| BBHSource | — | 86.9% | Not comparable |
| DROPSource | — | 88.6% | Not comparable |
| HellaSwagSource | — | 85.7% | Not comparable |
| WinoGrandeSource | — | 79.5% | Not comparable |
| CLUEWSCSource | — | 82.2% | Not comparable |
| LongBench v2Source | — | 44.7% | Not comparable |
KnowledgeDeepSeek V4 Flash Base wins16 benchmarks
| Benchmark | DeepSeek V4 Flash | DeepSeek V4 Flash Base | Result |
|---|---|---|---|
| MMLU-ProSource | 83% | 68.3% | DeepSeek V4 Flash leads |
| SimpleQASource | 23.1% | 30.1% | DeepSeek V4 Flash Base leads |
| Chinese-SimpleQASource | 71.5% | — | Not comparable |
| GPQASource | 71.2% | — | Not comparable |
| GPQA-DSource | 71.2% | — | Not comparable |
| HLESource | 8.1% | — | Not comparable |
| AGIEvalSource | — | 82.6% | Not comparable |
| MMLUSource | — | 88.7% | Not comparable |
| MMLU-ReduxSource | — | 89.4% | Not comparable |
| MMMLUSource | — | 88.8% | Not comparable |
| C-EvalSource | — | 92.1% | Not comparable |
| CMMLUSource | — | 90.4% | Not comparable |
| MultiLoKoSource | — | 42.2% | Not comparable |
| SuperGPQASource | — | 46.5% | Not comparable |
| FACTS ParametricSource | — | 33.9% | Not comparable |
| TriviaQASource | — | 82.8% | Not comparable |
Math7 benchmarks
| Benchmark | DeepSeek V4 Flash | DeepSeek V4 Flash Base | Result |
|---|---|---|---|
| HMMT Feb 2026Source | 40.8% | — | Not comparable |
| IMOAnswerBenchSource | 41.9% | — | Not comparable |
| ApexSource | 1.0% | — | Not comparable |
| Apex ShortlistSource | 9.3% | — | Not comparable |
| GSM8KSource | — | 90.8% | Not comparable |
| MATHSource | — | 57.4% | Not comparable |
| CMathSource | — | 93.6% | Not comparable |
Multilingual1 benchmarks
| Benchmark | DeepSeek V4 Flash | DeepSeek V4 Flash Base | Result |
|---|---|---|---|
| MGSMSource | — | 85.7% | Not comparable |
Multimodal1 benchmarks
| Benchmark | DeepSeek V4 Flash | DeepSeek V4 Flash Base | Result |
|---|---|---|---|
| Design Arena WebsiteSource | 1238 | — | Not comparable |
Frequently Asked Questions (2)
Which is better, DeepSeek V4 Flash or DeepSeek V4 Flash Base?
DeepSeek V4 Flash and DeepSeek V4 Flash 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 or DeepSeek V4 Flash Base?
DeepSeek V4 Flash Base has the edge for knowledge tasks in this comparison, averaging 56.4 versus 38.8. Inside this category, MMLU-Pro is the benchmark that creates the most daylight between them.
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