DeepSeek V4.1 Flash 1017 vs Gemini 4 Hydrogen
Gemini 4 Hydrogen leads DeepSeek V4.1 Flash 1017 on coding, 77.9 to 66.9 on the Vibe Coding Index, and DeepSeek V4.1 Flash 1017 costs 12.5x less per output token ($0.60 vs $7.50 per million). Updated November 14, 2026; 26 benchmarks have a result for both.
DeepSeek V4.1 Flash 1017 or Gemini 4 Hydrogen: which to pick
Pick Gemini 4 Hydrogen for coding: it scores 77.9 on the Vibe Coding Index against 66.9 for DeepSeek V4.1 Flash 1017.
Pick DeepSeek V4.1 Flash 1017 for output tokens 12.5x cheaper ($0.60 vs $7.50 per million) and work measured by LiveBench coding or Harvey's Legal Agent Benchmark (Vals AI), where it leads.
- Shared results
- 26
- DeepSeek V4.1 Flash 1017 only
- 34
- Gemini 4 Hydrogen only
- 24
- Like-for-like categories
- 6 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 66.9.
4 benchmarks behind each score
Intelligence
AA Intelligence Index
No call
Only DeepSeek V4.1 Flash 1017 has a AA Intelligence Index result, 28.6.
Directional only
Web design
Design Arena: websites
Gemini 4 Hydrogen
Gemini 4 Hydrogen leads, 1320 against 1294.
Same board, both measured
General
Vals Index
Gemini 4 Hydrogen
Gemini 4 Hydrogen leads, 68.5% against 61.3%.
Same board, both measured
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 1017
DeepSeek V4.1 Flash 1017 $0.0004, Gemini 4 Hydrogen $0.0053 per turn.
List prices
At a glance
- Coding index
- DeepSeek V4.1 Flash 1017 66.9 from 4 benchmarks, Gemini 4 Hydrogen 77.9 from 4 benchmarks.
- Widest category
- Reasoning, 24.2 points apart on average over 3 shared benchmarks.
- Widest single gap
- CritPt v2, hard subset (Artificial Analysis run): DeepSeek V4.1 Flash 1017 27.5% against Gemini 4 Hydrogen 66.0%, 38.5 points apart on a 0 to 100 scale.
- Output price
- DeepSeek V4.1 Flash 1017 $0.60 against Gemini 4 Hydrogen $7.50 per million output tokens, 12.5x 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 1017 | Bars | Gemini 4 Hydrogen | Ties |
|---|---|---|---|---|
| Coding | 1 | 8 | ||
| Agentic work | 1 | 5 | ||
| Reasoning | 1 | 2 | ||
| Knowledge | 0 | 1 | ||
| Web design | 1 | 4 | ||
| General | 0 | 2 | ||
| All shared boards | 4 | 22 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index18
| Benchmark | DeepSeek V4.1 Flash 1017 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| LiveBench coding | 80.4% | 78.5% | DeepSeek V4.1 Flash 1017 |
| LMArena WebDev | 1664 | 1704 | Gemini 4 Hydrogen |
| Terminal-Bench 4 (Vals AI) | 31.8% | 54.0% | Gemini 4 Hydrogen |
| Vibe Code Bench (Vals AI) | 87.7% | 87.8% | Gemini 4 Hydrogen |
| Code migration (Vals AI) | 44.2% | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| SciCode | 55.9% | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| Terminal-Bench 4.0 (Artificial Analysis run) | 33.8% | 54.0% | Gemini 4 Hydrogen |
| FrontierCode 2.0 | 28.5% | 39.0% | Gemini 4 Hydrogen |
| ALE-Bench | 1622.0 | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| LMArena Text: coding | Not measured | 1516 | Only Gemini 4 Hydrogen measured |
| LMArena Text: software and IT | Not measured | 1513 | Only Gemini 4 Hydrogen measured |
| LMArena WebDev: React | 1675 | 1724 | Gemini 4 Hydrogen |
| LMArena WebDev: HTML | 1696 | 1743 | Gemini 4 Hydrogen |
| LMArena WebDev: from an image | 1609 | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| GameBench 2 | 69.9 | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| Terminal-Bench 4.0 | 40.0% | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| CursorBench 4.0 | 47.7% | 57.8% | Gemini 4 Hydrogen |
| Neither model has a result on the other 35 boards here | |||
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index2 boards, none shared
| Benchmark | DeepSeek V4.1 Flash 1017 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| AA Intelligence Index | 28.6 | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| Epoch Capabilities Index | 159.4 | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index15
| Benchmark | DeepSeek V4.1 Flash 1017 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| Design Arena: spreadsheets | 1263 | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| LiveBench research | 78.6% | 86.8% | Gemini 4 Hydrogen |
| LiveBench browser | 67.2% | 77.1% | Gemini 4 Hydrogen |
| LiveBench long agentic | 38.8% | 61.8% | Gemini 4 Hydrogen |
| Finance Agent (Vals AI) | 57.0% | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| Tax Agent Bench (Vals AI) | 44.4% | 52.3% | Gemini 4 Hydrogen |
| Legal Research Bench (Vals AI) | 45.2% | 53.8% | Gemini 4 Hydrogen |
| Harvey's Legal Agent Benchmark (Vals AI) | 14.2% | 11.3% | DeepSeek V4.1 Flash 1017 |
| Excel Modeling Benchmark (Vals AI) | 61.8% | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| APEX-Agents | 69.8% | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| Neither model has a result on the other 34 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index12
| Benchmark | DeepSeek V4.1 Flash 1017 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| LiveBench reasoning | 89.1% | 88.6% | DeepSeek V4.1 Flash 1017 |
| Humanity's Last Exam (Artificial Analysis run) | 43.3% | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| HLE-Diamond (Artificial Analysis run) | 25.3% | 58.8% | Gemini 4 Hydrogen |
| CritPt v2, hard subset (Artificial Analysis run) | 27.5% | 66.0% | Gemini 4 Hydrogen |
| GPQA Diamond (Epoch AI run) | 93.2% | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| ARC-AGI | 94.5% | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| ARC-AGI-2 | 78.1% | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| Chess puzzles | 46.0% | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| Mystery game puzzles | 49.0% | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| LMArena Text: hard prompts | Not measured | 1520 | Only Gemini 4 Hydrogen measured |
| LMArena Text: expert | Not measured | 1558 | Only Gemini 4 Hydrogen measured |
| LMArena Text: hard prompts in English | Not measured | 1514 | Only Gemini 4 Hydrogen measured |
| Humanity's Last Exam (Scale run) | 20.5% | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| GoBench | 1633 | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| Neither model has a result on the other 12 boards here | |||
MathDirectional onlyPublic boards, shown as published, kept out of the index6 boards, none shared
| Benchmark | DeepSeek V4.1 Flash 1017 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| OTIS Mock AIME | 99.4% | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| FrontierMath, tiers 1 to 3 | 71.2% | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| FrontierMath, tier 4 | 46.3% | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| LMArena Text: math | Not measured | 1507 | Only Gemini 4 Hydrogen measured |
| LMArena Text: mathematical work | Not measured | 1534 | Only Gemini 4 Hydrogen measured |
| MathArena | 46.7% | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| Neither model has a result on the other 8 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index01
| Benchmark | DeepSeek V4.1 Flash 1017 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| AA-Omniscience | 2.1 | 46.3 | Gemini 4 Hydrogen |
| SimpleQA Verified | 42.5% | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| LMArena Text: science | Not measured | 1519 | Only Gemini 4 Hydrogen measured |
| LMArena Text: medicine and healthcare | Not measured | 1488 | Only Gemini 4 Hydrogen measured |
| LMArena Text: legal and government | Not measured | 1532 | Only Gemini 4 Hydrogen measured |
| LMArena Text: business and finance | Not measured | 1486 | Only Gemini 4 Hydrogen measured |
| PRBench Finance | 47.1% | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| PRBench Legal | 47.3% | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| Neither model has a result on the other 13 boards here | |||
Web designLike-for-likePublic boards, shown as published, kept out of the index14
| Benchmark | DeepSeek V4.1 Flash 1017 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| Design Arena: websites | 1294 | 1320 | Gemini 4 Hydrogen |
| Design Arena: UI components | 1283 | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| Design Arena: game dev | 1250 | 1369 | Gemini 4 Hydrogen |
| Design Arena: data viz | 1264 | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| Design Arena: 3D | 1342 | 1415 | Gemini 4 Hydrogen |
| Design Arena: all code categories | 1286 | 1333 | Gemini 4 Hydrogen |
| Design Arena: SVG | 1246 | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| Design Arena: ASCII art | 1231 | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| LiveBench design | 79.8% | 77.3% | DeepSeek V4.1 Flash 1017 |
GeneralLike-for-likePublic boards, shown as published, kept out of the index02
| Benchmark | DeepSeek V4.1 Flash 1017 | Gemini 4 Hydrogen | Leader |
|---|---|---|---|
| Vals Index | 61.3% | 68.5% | Gemini 4 Hydrogen |
| LiveBench data analysis | 79.5% | 83.2% | Gemini 4 Hydrogen |
| Long context reasoning (AA-LCR) | 82.7% | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| GDPval-AA | 1746 | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| LMArena Text | Not measured | 1502 | Only Gemini 4 Hydrogen measured |
| LMArena Text: instruction following | Not measured | 1519 | Only Gemini 4 Hydrogen measured |
| LMArena Text: creative writing | Not measured | 1509 | Only Gemini 4 Hydrogen measured |
| LMArena Text: English | Not measured | 1499 | Only Gemini 4 Hydrogen measured |
| LMArena Text: non-English | Not measured | 1495 | Only Gemini 4 Hydrogen measured |
| LMArena Text: Chinese | Not measured | 1631 | Only Gemini 4 Hydrogen measured |
| LMArena Text: French | Not measured | 1512 | Only Gemini 4 Hydrogen measured |
| LMArena Text: Spanish | Not measured | 1494 | Only Gemini 4 Hydrogen measured |
| LMArena Text: Russian | Not measured | 1492 | Only Gemini 4 Hydrogen measured |
| LMArena Text: multi-turn | Not measured | 1485 | Only Gemini 4 Hydrogen measured |
| LMArena Text: longer queries | Not measured | 1524 | Only Gemini 4 Hydrogen measured |
| LMArena Text: writing and language | Not measured | 1500 | Only Gemini 4 Hydrogen measured |
| LMArena Text: entertainment and media | Not measured | 1503 | Only Gemini 4 Hydrogen measured |
| MultiChallenge | 74.9% | Not measured | Only DeepSeek V4.1 Flash 1017 measured |
| Neither model has a result on the other 31 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | DeepSeek V4.1 Flash 1017 | 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 1017 costs less
Repository review
50K input + 3K output tokens
DeepSeek V4.1 Flash 1017 costs less
Agent loop
200K input + 10K output tokens
DeepSeek V4.1 Flash 1017 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 1017 | Google Gemini 4 Hydrogen |
|---|---|---|
| Maker | DeepSeek | |
| Weights | Open weights | No public weights listed |
| Released | October 17, 2026 | November 12, 2026 |
| Context window | 1.05M | 1.05M |
| Input $/Mtok | $0.15 | $1.50 |
| Output $/Mtok | $0.60 | $7.50 |
| Coding index | 66.9 | 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 1017 better than Gemini 4 Hydrogen for coding?
Pick Gemini 4 Hydrogen for coding: it scores 77.9 on the Vibe Coding Index against 66.9 for DeepSeek V4.1 Flash 1017. Pick DeepSeek V4.1 Flash 1017 for output tokens 12.5x cheaper ($0.60 vs $7.50 per million) and work measured by LiveBench coding or Harvey's Legal Agent Benchmark (Vals AI), where it leads.
Which is cheaper, DeepSeek V4.1 Flash 1017 or Gemini 4 Hydrogen?
DeepSeek V4.1 Flash 1017 costs $0.15 per million input tokens and $0.60 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 1017 or Gemini 4 Hydrogen?
Neither: both take 1.05M tokens.
How many benchmarks is the DeepSeek V4.1 Flash 1017 vs Gemini 4 Hydrogen comparison based on?
26 benchmarks have a result for both models as of November 14, 2026. DeepSeek V4.1 Flash 1017'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.