DeepSeek V4.1 Flash vs Gemini 4 Hydrogen
Gemini 4 Hydrogen leads DeepSeek V4.1 Flash on coding, 77.9 to 56.6 on the Vibe Coding Index, and DeepSeek V4.1 Flash costs 9.5x less per output token ($0.79 vs $7.50 per million). Updated November 14, 2026; 37 benchmarks have a result for both.
vs boards won of 37 shared
DeepSeek V4.1 Flash or Gemini 4 Hydrogen: which to pick
Pick Gemini 4 Hydrogen for coding: it scores 77.9 on the Vibe Coding Index against 56.6 for DeepSeek V4.1 Flash.
Pick DeepSeek V4.1 Flash for output tokens 9.5x cheaper ($0.79 vs $7.50 per million) and work measured by LMArena Text: medicine and healthcare, where it leads.
Model ADeepSeek V4.1 FlashDeepSeek56.6/1004 independent benchmarksNo cost per solved taskModel BGemini 4 HydrogenGoogle77.9/1004 independent benchmarksNo cost per solved task
- Shared results
- 37
- DeepSeek V4.1 Flash only
- 64
- Gemini 4 Hydrogen only
- 13
- Like-for-like categories
- 7 of 9
Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.
Which one for your work
Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.
Coding
Vibe Coding Index, six public coding benchmarks
Gemini 4 Hydrogen
Gemini 4 Hydrogen scores 77.9 against 56.6.
4 benchmarks behind each score
Web design
Design Arena: websites
Gemini 4 Hydrogen
Gemini 4 Hydrogen leads, 1320 against 1298.
Same board, both measured
General
Vals Index
No call
Only Gemini 4 Hydrogen has a Vals Index result, 68.5%.
Directional only
Long documents
Listed context window
No call
Both take 1.05M tokens.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
DeepSeek V4.1 Flash
DeepSeek V4.1 Flash $0.0006, Gemini 4 Hydrogen $0.0053 per turn.
List prices
At a glance
- Coding index
- DeepSeek V4.1 Flash 56.6 from 4 benchmarks, Gemini 4 Hydrogen 77.9 from 4 benchmarks.
- Widest category
- Agentic work, 19.1 points apart on average over 2 shared benchmarks.
- Widest single gap
- Terminal-Bench 4 (Vals AI): DeepSeek V4.1 Flash 19.7% against Gemini 4 Hydrogen 54.0%, 45.8 points apart on a 0 to 100 scale.
- Output price
- DeepSeek V4.1 Flash $0.79 against Gemini 4 Hydrogen $7.50 per million output tokens, 9.5x apart.
- Context window
- Both take 1.05M tokens.
Benchmark by benchmark
First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.
| Category | DeepSeek V4.1 Flash | Bars | Gemini 4 Hydrogen | Ties |
|---|---|---|---|---|
| Coding | 0 | 8 | ||
| Agentic work | 0 | 2 | ||
| Reasoning | 0 | 4 | ||
| Math | 0 | 2 | ||
| Knowledge | 1 | 3 | ||
| Web design | 0 | 4 | ||
| General | 0 | 13 | ||
| All shared boards | 1 | 36 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index08
| Benchmark | DeepSeek V4.1 Flash | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| LiveBench coding | Not measured | 78.5% | Only Gemini 4 Hydrogen measured |
| LMArena WebDev | 1621 | 1704 | Gemini 4 Hydrogen |
| Terminal-Bench 4 (Vals AI) | 19.7% | 54.0% | Gemini 4 Hydrogen |
| Vibe Code Bench (Vals AI) | 84.7% | 87.8% | Gemini 4 Hydrogen |
| Code migration (Vals AI) | 45.6% | Not measured | Only DeepSeek V4.1 Flash measured |
| ProgramBench (Vals AI) | 0.5% | Not measured | Only DeepSeek V4.1 Flash measured |
| IOI (Vals AI) | 40.3% | Not measured | Only DeepSeek V4.1 Flash measured |
| Terminal-Bench 2.1 (Vals AI) | 74.5% | Not measured | Only DeepSeek V4.1 Flash measured |
| SWE-bench Multimodal (Vals AI) | 46.5% | Not measured | Only DeepSeek V4.1 Flash measured |
| Vibe Code Bench 1-100 (Vals AI) | 16.4% | Not measured | Only DeepSeek V4.1 Flash measured |
| SkillsBench (Vals AI) | 69.8% | Not measured | Only DeepSeek V4.1 Flash measured |
| CyberBench (Vals AI) | 73.7% | Not measured | Only DeepSeek V4.1 Flash measured |
| SciCode | 51.9% | Not measured | Only DeepSeek V4.1 Flash measured |
| Terminal-Bench 4.0 (Artificial Analysis run) | 26.8% | 54.0% | Gemini 4 Hydrogen |
| FrontierCode 2.0 | Not measured | 39.0% | Only Gemini 4 Hydrogen measured |
| FrontierCode | 43.9% | Not measured | Only DeepSeek V4.1 Flash measured |
| MirrorCode | 64.4% | Not measured | Only DeepSeek V4.1 Flash measured |
| ALE-Bench | 1092.3 | Not measured | Only DeepSeek V4.1 Flash measured |
| LMArena Text: coding | 1504 | 1516 | Gemini 4 Hydrogen |
| LMArena Text: software and IT | 1496 | 1513 | Gemini 4 Hydrogen |
| LMArena WebDev: React | 1630 | 1724 | Gemini 4 Hydrogen |
| LMArena WebDev: HTML | 1618 | 1743 | Gemini 4 Hydrogen |
| LMArena WebDev: from an image | 1610 | Not measured | Only DeepSeek V4.1 Flash measured |
| GameBench 2 | 68.4 | Not measured | Only DeepSeek V4.1 Flash measured |
| CursorBench 4.0 | Not measured | 57.8% | Only Gemini 4 Hydrogen measured |
| Neither model has a result on the other 27 boards here | |||
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index1 board, none shared
| Benchmark | DeepSeek V4.1 Flash | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| Epoch Capabilities Index | 156.7 | Not measured | Only DeepSeek V4.1 Flash measured |
| Neither model has a result on the other 1 board here | |||
Agentic workLike-for-likePublic boards, shown as published, kept out of the index02
| Benchmark | DeepSeek V4.1 Flash | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| LiveBench research | Not measured | 86.8% | Only Gemini 4 Hydrogen measured |
| LiveBench browser | Not measured | 77.1% | Only Gemini 4 Hydrogen measured |
| LiveBench long agentic | Not measured | 61.8% | Only Gemini 4 Hydrogen measured |
| SREBench (Vals AI) | 0.8% | Not measured | Only DeepSeek V4.1 Flash measured |
| Finance Agent (Vals AI) | 53.5% | Not measured | Only DeepSeek V4.1 Flash measured |
| Tax Agent Bench (Vals AI) | 26.6% | 52.3% | Gemini 4 Hydrogen |
| Legal Research Bench (Vals AI) | 41.4% | 53.8% | Gemini 4 Hydrogen |
| Harvey's Legal Agent Benchmark (Vals AI) | Not measured | 11.3% | Only Gemini 4 Hydrogen measured |
| Excel Modeling Benchmark (Vals AI) | 57.2% | Not measured | Only DeepSeek V4.1 Flash measured |
| BioMysteryBench (Vals AI) | 67.8% | Not measured | Only DeepSeek V4.1 Flash measured |
| Terminal-Bench-Science (Vals AI) | 0.0% | Not measured | Only DeepSeek V4.1 Flash measured |
| Vals Science Index | 29.6% | Not measured | Only DeepSeek V4.1 Flash measured |
| APEX-Agents | 39.5% | Not measured | Only DeepSeek V4.1 Flash measured |
| Neither model has a result on the other 31 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index04
| Benchmark | DeepSeek V4.1 Flash | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| LiveBench reasoning | Not measured | 88.6% | Only Gemini 4 Hydrogen measured |
| MysteryMechanism (Vals AI) | 21.2% | Not measured | Only DeepSeek V4.1 Flash measured |
| Humanity's Last Exam (Artificial Analysis run) | 39.2% | Not measured | Only DeepSeek V4.1 Flash measured |
| HLE-Diamond (Artificial Analysis run) | 19.1% | 58.8% | Gemini 4 Hydrogen |
| CritPt v2, hard subset (Artificial Analysis run) | Not measured | 66.0% | Only Gemini 4 Hydrogen measured |
| GPQA Diamond (Epoch AI run) | 89.8% | Not measured | Only DeepSeek V4.1 Flash measured |
| ARC-AGI | 94.5% | Not measured | Only DeepSeek V4.1 Flash measured |
| ARC-AGI-2 | 72.9% | Not measured | Only DeepSeek V4.1 Flash measured |
| SimpleBench | 66.7% | Not measured | Only DeepSeek V4.1 Flash measured |
| Chess puzzles | 48.0% | Not measured | Only DeepSeek V4.1 Flash measured |
| Mystery game puzzles | 43.0% | Not measured | Only DeepSeek V4.1 Flash measured |
| LMArena Text: hard prompts | 1483 | 1520 | Gemini 4 Hydrogen |
| LMArena Text: expert | 1503 | 1558 | Gemini 4 Hydrogen |
| LMArena Text: hard prompts in English | 1488 | 1514 | Gemini 4 Hydrogen |
| LMArena Vision: diagrams | 1299 | Not measured | Only DeepSeek V4.1 Flash measured |
| LMArena Vision: homework | 1307 | Not measured | Only DeepSeek V4.1 Flash measured |
| GoBench | 1706 | Not measured | Only DeepSeek V4.1 Flash measured |
| Neither model has a result on the other 9 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index02
| Benchmark | DeepSeek V4.1 Flash | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| OTIS Mock AIME | 98.3% | Not measured | Only DeepSeek V4.1 Flash measured |
| FrontierMath, tiers 1 to 3 | 67.4% | Not measured | Only DeepSeek V4.1 Flash measured |
| FrontierMath, tier 4 | 26.8% | Not measured | Only DeepSeek V4.1 Flash measured |
| ProofBench | 54.0% | Not measured | Only DeepSeek V4.1 Flash measured |
| LMArena Text: math | 1479 | 1507 | Gemini 4 Hydrogen |
| LMArena Text: mathematical work | 1479 | 1534 | Gemini 4 Hydrogen |
| MathArena | 39.3% | Not measured | Only DeepSeek V4.1 Flash measured |
| Neither model has a result on the other 7 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index13
| Benchmark | DeepSeek V4.1 Flash | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| LegalBench (Vals AI) | 83.3% | Not measured | Only DeepSeek V4.1 Flash measured |
| MedCode (Vals AI) | 41.2% | Not measured | Only DeepSeek V4.1 Flash measured |
| AA-Omniscience | Not measured | 46.3 | Only Gemini 4 Hydrogen measured |
| SimpleQA Verified | 42.9% | Not measured | Only DeepSeek V4.1 Flash measured |
| LMArena Text: science | 1468 | 1519 | Gemini 4 Hydrogen |
| LMArena Text: medicine and healthcare | 1490 | 1488 | DeepSeek V4.1 Flash |
| LMArena Text: legal and government | 1447 | 1532 | Gemini 4 Hydrogen |
| LMArena Text: business and finance | 1463 | 1486 | Gemini 4 Hydrogen |
| Neither model has a result on the other 13 boards here | |||
Web designLike-for-likePublic boards, shown as published, kept out of the index04
| Benchmark | DeepSeek V4.1 Flash | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| Design Arena: websites | 1298 | 1320 | Gemini 4 Hydrogen |
| Design Arena: UI components | 1303 | Not measured | Only DeepSeek V4.1 Flash measured |
| Design Arena: game dev | 1324 | 1369 | Gemini 4 Hydrogen |
| Design Arena: data viz | 1285 | Not measured | Only DeepSeek V4.1 Flash measured |
| Design Arena: 3D | 1338 | 1415 | Gemini 4 Hydrogen |
| Design Arena: all code categories | 1309 | 1333 | Gemini 4 Hydrogen |
| Design Arena: SVG | 1231 | Not measured | Only DeepSeek V4.1 Flash measured |
| Design Arena: ASCII art | 1259 | Not measured | Only DeepSeek V4.1 Flash measured |
| LiveBench design | Not measured | 77.3% | Only Gemini 4 Hydrogen measured |
GeneralLike-for-likePublic boards, shown as published, kept out of the index013
| Benchmark | DeepSeek V4.1 Flash | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| Vals Index | Not measured | 68.5% | Only Gemini 4 Hydrogen measured |
| LiveBench data analysis | Not measured | 83.2% | Only Gemini 4 Hydrogen measured |
| Public Benefits Bench (Vals AI) | 64.3% | Not measured | Only DeepSeek V4.1 Flash measured |
| SAGE (Vals AI) | 85.4% | Not measured | Only DeepSeek V4.1 Flash measured |
| MedScribe (Vals AI) | 85.5% | Not measured | Only DeepSeek V4.1 Flash measured |
| Long context reasoning (AA-LCR) | 84.0% | Not measured | Only DeepSeek V4.1 Flash measured |
| GDPval-AA | 1600 | Not measured | Only DeepSeek V4.1 Flash measured |
| DTBench | 89.9% | Not measured | Only DeepSeek V4.1 Flash measured |
| LMCA | 47.0% | Not measured | Only DeepSeek V4.1 Flash measured |
| Surface Evolver Bench | 46.3% | Not measured | Only DeepSeek V4.1 Flash measured |
| Furniture assembly | 34.2% | Not measured | Only DeepSeek V4.1 Flash measured |
| LMArena Text | 1464 | 1502 | Gemini 4 Hydrogen |
| LMArena Text: instruction following | 1473 | 1519 | Gemini 4 Hydrogen |
| LMArena Text: creative writing | 1438 | 1509 | Gemini 4 Hydrogen |
| LMArena Vision | 1279 | Not measured | Only DeepSeek V4.1 Flash measured |
| LMArena Text: English | 1474 | 1499 | Gemini 4 Hydrogen |
| LMArena Text: non-English | 1450 | 1495 | Gemini 4 Hydrogen |
| LMArena Text: Chinese | 1505 | 1631 | Gemini 4 Hydrogen |
| LMArena Text: German | 1460 | Not measured | Only DeepSeek V4.1 Flash measured |
| LMArena Text: Japanese | 1430 | Not measured | Only DeepSeek V4.1 Flash measured |
| LMArena Text: Korean | 1423 | Not measured | Only DeepSeek V4.1 Flash measured |
| LMArena Text: French | 1470 | 1512 | Gemini 4 Hydrogen |
| LMArena Text: Spanish | 1456 | 1494 | Gemini 4 Hydrogen |
| LMArena Text: Russian | 1469 | 1492 | Gemini 4 Hydrogen |
| LMArena Text: Polish | 1453 | Not measured | Only DeepSeek V4.1 Flash measured |
| LMArena Text: multi-turn | 1462 | 1485 | Gemini 4 Hydrogen |
| LMArena Text: longer queries | 1474 | 1524 | Gemini 4 Hydrogen |
| LMArena Text: writing and language | 1449 | 1500 | Gemini 4 Hydrogen |
| LMArena Text: entertainment and media | 1444 | 1503 | Gemini 4 Hydrogen |
| LMArena Vision: English | 1290 | Not measured | Only DeepSeek V4.1 Flash measured |
| LMArena Vision: Chinese | 1345 | Not measured | Only DeepSeek V4.1 Flash measured |
| LMArena Vision: reading text | 1284 | Not measured | Only DeepSeek V4.1 Flash measured |
| LMArena Vision: humor | 1279 | Not measured | Only DeepSeek V4.1 Flash measured |
| LMArena Vision: creative writing | 1283 | Not measured | Only DeepSeek V4.1 Flash measured |
| Neither model has a result on the other 15 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | DeepSeek V4.1 Flash | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| Neither model has a result on 5 boards here | |||
What each workload costs
Three fixed token mixes at each model's listed price, so per-token rates become a bill.
Chat turn
1K input + 500 output tokens
DeepSeek V4.1 Flash$0.0006Fits in one request
Gemini 4 Hydrogen$0.0053Fits in one request
DeepSeek V4.1 Flash costs less
Repository review
50K input + 3K output tokens
DeepSeek V4.1 Flash$0.012Fits in one request
Gemini 4 Hydrogen$0.098Fits in one request
DeepSeek V4.1 Flash costs less
Agent loop
200K input + 10K output tokens
DeepSeek V4.1 Flash$0.048Fits in one request
Gemini 4 Hydrogen$0.375Fits in one request
DeepSeek V4.1 Flash costs less
Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.
Specification differences
The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.
| Specification | DeepSeek V4.1 Flash | Google Gemini 4 Hydrogen |
|---|---|---|
| Maker | DeepSeek | |
| Weights | Open weights | No public weights listed |
| Released | September 10, 2026 | November 12, 2026 |
| Context window | 1.05M | 1.05M |
| Input $/Mtok | $0.2025 | $1.50 |
| Output $/Mtok | $0.79 | $7.50 |
| Coding index | 56.6 | 77.9 |
| Independent measurements behind it | 4 | 4 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is DeepSeek V4.1 Flash better than Gemini 4 Hydrogen for coding?
Pick Gemini 4 Hydrogen for coding: it scores 77.9 on the Vibe Coding Index against 56.6 for DeepSeek V4.1 Flash. Pick DeepSeek V4.1 Flash for output tokens 9.5x cheaper ($0.79 vs $7.50 per million) and work measured by LMArena Text: medicine and healthcare, where it leads.
Which is cheaper, DeepSeek V4.1 Flash or Gemini 4 Hydrogen?
DeepSeek V4.1 Flash costs $0.2025 per million input tokens and $0.79 per million output tokens; Gemini 4 Hydrogen costs $1.50 and $7.50. Cost per solved task is known for neither of them.
Which has the bigger context window, DeepSeek V4.1 Flash or Gemini 4 Hydrogen?
Neither: both take 1.05M tokens.
How many benchmarks is the DeepSeek V4.1 Flash vs Gemini 4 Hydrogen comparison based on?
37 benchmarks have a result for both models as of November 14, 2026. DeepSeek V4.1 Flash's coding index rests on 4 independent benchmarks and Gemini 4 Hydrogen's on 4. Where only one model has a result, the page says so instead of naming a winner.