Model comparison
DeepSeek V4 Flash (High) vs Gemini 2.5 Pro
Head-to-head evidence from 19 shared benchmark results across 6 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: DeepSeek V4 Flash (High) #92 (Estimated); Gemini 2.5 Pro #70 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. DeepSeek V4 Flash (High) and Gemini 2.5 Pro share 19 comparable benchmark results. 3 of 8 categories are comparable. 19 results are unique to DeepSeek V4 Flash (High); 5 to Gemini 2.5 Pro.
Updated July 23, 2026- Shared results
- 19
- DeepSeek V4 Flash (High) only
- 19
- Gemini 2.5 Pro only
- 5
- Comparable categories
- 3 / 8
Pick Gemini 2.5 Pro if you want the stronger benchmark profile. DeepSeek V4 Flash (High) only becomes the better choice if mathematics is the priority or you want the cheaper token bill.
Confidence note. This is a partial-evidence comparison with 19 shared benchmark results across 6 evidence categories; 3 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Gemini 2.5 Pro is clearly ahead on the BenchAlign aggregate, 57.25 to 53.95. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Gemini 2.5 Pro is also the more expensive model on tokens at $1.25 input / $10.00 output per 1M tokens, versus $0.14 input / $0.28 output per 1M tokens for DeepSeek V4 Flash (High). That is roughly 35.7x on output cost alone. DeepSeek V4 Flash (High) is the reasoning model in the pair, while Gemini 2.5 Pro 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.
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 (High) | Δ | Gemini 2.5 Pro |
|---|---|---|---|
| Math | DeepSeek V4 Flash (High)91.9 | Margin← 80.3 | Gemini 2.5 Pro11.6 |
| Knowledge | DeepSeek V4 Flash (High)52.1 | Margin← 24.7 | Gemini 2.5 Pro27.4 |
| Coding | DeepSeek V4 Flash (High)68.5 | Margin← 4.7 | Gemini 2.5 Pro63.8 |
| Agentic | DeepSeek V4 Flash (High)55.3 | MarginNo overlap | Gemini 2.5 ProNot measured |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
SWE-bench Verified
CodingA 78.6%B 63.8%Winner: DeepSeek V4 Flash (High)Δ 14.8SWE-bench Verified: DeepSeek V4 Flash (High) scored 78.6%; Gemini 2.5 Pro scored 63.8%. DeepSeek V4 Flash (High) wins this benchmark. - Source ↗
HLE
KnowledgeA 29.4%B 18.8%Winner: DeepSeek V4 Flash (High)Δ 10.6HLE: DeepSeek V4 Flash (High) scored 29.4%; Gemini 2.5 Pro scored 18.8%. DeepSeek V4 Flash (High) wins this benchmark. - Source ↗
GPQA
KnowledgeA 87.4%B 83%Winner: DeepSeek V4 Flash (High)Δ 4.4GPQA: DeepSeek V4 Flash (High) scored 87.4%; Gemini 2.5 Pro scored 83%. DeepSeek V4 Flash (High) wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | DeepSeek V4 Flash (High) | Gemini 2.5 Pro | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | DeepSeek V4 Flash (High)$0.14 input / $0.28 output | Gemini 2.5 Pro$1.25 input / $10 output | DeepSeek V4 Flash (High) has the lower combined listed price. |
| Generation speedtokens per second | DeepSeek V4 Flash (High)Not available | Gemini 2.5 Pro117 tok/s | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | DeepSeek V4 Flash (High)Not available | Gemini 2.5 Pro21.19 s | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | DeepSeek V4 Flash (High)1M | Gemini 2.5 Pro1M | Listed context windows are equal. |
Benchmark Deep Dive
Agentic10 benchmarks
| Benchmark | DeepSeek V4 Flash (High) | Gemini 2.5 Pro | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 56.6% | — | Not comparable |
| BrowseCompSource | 53.5% | — | Not comparable |
| HLE w/ toolsSource | 40.3% | — | Not comparable |
| MCP AtlasSource | 67.4% | — | Not comparable |
| ToolathlonSource | 43.5% | — | Not comparable |
| τ²-bench resultsSource | 95.6% | 54.1% | DeepSeek V4 Flash (High) leads |
| AA Agentic IndexSource | 28.2% | 7.1% | DeepSeek V4 Flash (High) leads |
| GDPval-AASource | 32.4% | 8.3% | DeepSeek V4 Flash (High) leads |
| GDPval-AASource | 1147 | 665 | DeepSeek V4 Flash (High) leads |
| Gert LabsSource | — | 42.01% | Not comparable |
CodingDeepSeek V4 Flash (High) wins8 benchmarks
| Benchmark | DeepSeek V4 Flash (High) | Gemini 2.5 Pro | Result |
|---|---|---|---|
| CodeforcesSource | 2816.0 | — | Not comparable |
| SWE-bench VerifiedSource | 78.6% | 63.8% | DeepSeek V4 Flash (High) leads |
| SWE-bench ProSource | 52.3% | — | Not comparable |
| SWE MultilingualSource | 70.2% | — | Not comparable |
| Terminal-Bench 2.0Source | 56.6% | — | Not comparable |
| AA-SciCodeSource | 42.0% | 42.8% | Gemini 2.5 Pro leads |
| AA Coding IndexSource | 52.0% | 33.3% | DeepSeek V4 Flash (High) leads |
| Vibe Code BenchSource | — | 0.40% | Not comparable |
Reasoning4 benchmarks
KnowledgeDeepSeek V4 Flash (High) wins12 benchmarks
| Benchmark | DeepSeek V4 Flash (High) | Gemini 2.5 Pro | Result |
|---|---|---|---|
| MMLU-ProSource | 86.4% | — | Not comparable |
| SimpleQASource | 28.9% | — | Not comparable |
| Chinese-SimpleQASource | 73.2% | — | Not comparable |
| GPQASource | 87.4% | 83% | DeepSeek V4 Flash (High) leads |
| GPQA-DSource | 87.4% | — | Not comparable |
| HLESource | 29.4% | 18.8% | DeepSeek V4 Flash (High) leads |
| Artificial Analysis Intelligence IndexSource | 37.5% | 25.8% | DeepSeek V4 Flash (High) leads |
| AA-GPQA DiamondSource | 86.7% | 84.4% | DeepSeek V4 Flash (High) leads |
| AA-HLESource | 27.8% | 21.1% | DeepSeek V4 Flash (High) leads |
| AA-Omniscience IndexSource | -22.3% | -14.3% | Gemini 2.5 Pro leads |
| AA-Omniscience AccuracySource | 35.5% | 39.0% | Gemini 2.5 Pro leads |
| AA-Omniscience Hallucination RateSource | 89.7% | 87.4% | Gemini 2.5 Pro leads |
MathDeepSeek V4 Flash (High) wins6 benchmarks
| Benchmark | DeepSeek V4 Flash (High) | Gemini 2.5 Pro | Result |
|---|---|---|---|
| HMMT Feb 2026Source | 91.9% | — | Not comparable |
| IMOAnswerBenchSource | 85.1% | — | Not comparable |
| ApexSource | 19.1% | — | Not comparable |
| Apex ShortlistSource | 72.1% | — | Not comparable |
| FrontierMath v2 (Tiers 1-3)Source | — | 14.138% | Not comparable |
| FrontierMath v2 (Tier 4)Source | — | 4.167% | Not comparable |
Multimodal2 benchmarks
Inst. Following1 benchmarks
| Benchmark | DeepSeek V4 Flash (High) | Gemini 2.5 Pro | Result |
|---|---|---|---|
| AA-IFBenchSource | 73.5% | 48.7% | DeepSeek V4 Flash (High) leads |
Frequently Asked Questions (4)
Which is better, DeepSeek V4 Flash (High) or Gemini 2.5 Pro?
Gemini 2.5 Pro is ahead on BenchLM's BenchAlign leaderboard, 57.25 to 53.95. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 78.6% and 63.8%.
Which is better for knowledge tasks, DeepSeek V4 Flash (High) or Gemini 2.5 Pro?
DeepSeek V4 Flash (High) has the edge for knowledge tasks in this comparison, averaging 52.1 versus 27.4. Inside this category, Artificial Analysis Intelligence Index is the benchmark that creates the most daylight between them.
Which is better for coding, DeepSeek V4 Flash (High) or Gemini 2.5 Pro?
DeepSeek V4 Flash (High) has the edge for coding in this comparison, averaging 68.5 versus 63.8. Inside this category, AA Coding Index is the benchmark that creates the most daylight between them.
Which is better for math, DeepSeek V4 Flash (High) or Gemini 2.5 Pro?
DeepSeek V4 Flash (High) has the edge for math in this comparison, averaging 91.9 versus 11.6. Gemini 2.5 Pro stays close enough that the answer can still flip depending on your workload.
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