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Gemini 4 Hydrogen vs Mistral Medium 3.5

Gemini 4 Hydrogen leads Mistral Medium 3.5 on coding, 77.9 to 25.4 on the Vibe Coding Index, at about the same output price ($7.50 vs $7.50 per million). Updated November 14, 2026; 39 benchmarks have a result for both.

Replace Gemini 4 Hydrogen Replace Mistral Medium 3.5
Gemini 4 HydrogenGoogle
Coding
77.9
Overall
77.1
Output $/M
$7.50
39
Mistral Medium 3.5Mistral AI
Coding
25.4
Overall
33.2
Output $/M
$7.50
0
vs boards won of 39 shared

Gemini 4 Hydrogen or Mistral Medium 3.5: which to pick

Pick Gemini 4 Hydrogen for coding: it scores 77.9 on the Vibe Coding Index against 25.4 for Mistral Medium 3.5.

Mistral Medium 3.5 is neither cheaper nor larger in context, and leads no benchmark both models were measured on.

Model AGemini 4 HydrogenGoogle77.9/1004 independent benchmarksNo cost per solved taskModel BMistral Medium 3.5Mistral AI25.4/1003 independent benchmarks$6.02 per solved task
Shared results
39
Gemini 4 Hydrogen only
11
Mistral Medium 3.5 only
50
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.

At a glance

Coding index
Gemini 4 Hydrogen 77.9 from 4 benchmarks, Mistral Medium 3.5 25.4 from 3 benchmarks.
Widest category
Agentic work, 46.3 points apart on average over 2 shared benchmarks.
Widest single gap
Vibe Code Bench (Vals AI): Gemini 4 Hydrogen 87.8% against Mistral Medium 3.5 2.9%, 84.9 points apart on a 0 to 100 scale.
Output price
Both cost $7.50 per million output tokens.
Context window
Gemini 4 Hydrogen takes 1.05M tokens, Mistral Medium 3.5 262K.

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.

Boards won, where both have a result
CategoryGemini 4 HydrogenBarsMistral Medium 3.5Ties
Coding80
Agentic work20
Reasoning50
Math20
Knowledge50
Web design40
General130
All shared boards390
CodingLike-for-likeSix of these boards feed the Vibe Coding Index80
Coding benchmarks for Gemini 4 Hydrogen and Mistral Medium 3.5
BenchmarkGemini 4 HydrogenMistral Medium 3.5Leader
LiveBench coding78.5%Not measuredOnly Gemini 4 Hydrogen measured
LMArena WebDev17041263Gemini 4 Hydrogen
AA Coding IndexNot measured46.9Only Mistral Medium 3.5 measured
SWE-bench Verified (Vals AI)Not measured66.4%Only Mistral Medium 3.5 measured
Terminal-Bench 4 (Vals AI)54.0%Not measuredOnly Gemini 4 Hydrogen measured
Vibe Code Bench (Vals AI)87.8%2.9%Gemini 4 Hydrogen
Code migration (Vals AI)Not measured5.1%Only Mistral Medium 3.5 measured
Terminal-Bench 2.1 (Vals AI)Not measured39.0%Only Mistral Medium 3.5 measured
SciCodeNot measured40.2%Only Mistral Medium 3.5 measured
Terminal-Bench Hard (Artificial Analysis run)Not measured33.3%Only Mistral Medium 3.5 measured
Terminal-Bench 4.0 (Artificial Analysis run)54.0%0.0%Gemini 4 Hydrogen
FrontierCode 2.039.0%1.8%Gemini 4 Hydrogen
ALE-BenchNot measured764.0Only Mistral Medium 3.5 measured
LMArena Text: coding15161461Gemini 4 Hydrogen
LMArena Text: software and IT15131458Gemini 4 Hydrogen
LMArena WebDev: React17241252Gemini 4 Hydrogen
LMArena WebDev: HTML17431309Gemini 4 Hydrogen
GameBench 2Not measured26.8Only Mistral Medium 3.5 measured
CursorBench 4.057.8%Not measuredOnly Gemini 4 Hydrogen measured
Neither model has a result on the other 33 boards here
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index2 boards, none shared
Intelligence benchmarks for Gemini 4 Hydrogen and Mistral Medium 3.5
BenchmarkGemini 4 HydrogenMistral Medium 3.5Leader
AA Intelligence IndexNot measured4.6Only Mistral Medium 3.5 measured
Epoch Capabilities IndexNot measured141.6Only Mistral Medium 3.5 measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index20
Agentic work benchmarks for Gemini 4 Hydrogen and Mistral Medium 3.5
BenchmarkGemini 4 HydrogenMistral Medium 3.5Leader
AA Agentic IndexNot measured7.0Only Mistral Medium 3.5 measured
LiveBench research86.8%Not measuredOnly Gemini 4 Hydrogen measured
LiveBench browser77.1%Not measuredOnly Gemini 4 Hydrogen measured
LiveBench long agentic61.8%Not measuredOnly Gemini 4 Hydrogen measured
Finance Agent (Vals AI)Not measured32.1%Only Mistral Medium 3.5 measured
Tax Agent Bench (Vals AI)52.3%4.5%Gemini 4 Hydrogen
Legal Research Bench (Vals AI)53.8%9.1%Gemini 4 Hydrogen
Harvey's Legal Agent Benchmark (Vals AI)11.3%Not measuredOnly Gemini 4 Hydrogen measured
Excel Modeling Benchmark (Vals AI)Not measured11.2%Only Mistral Medium 3.5 measured
τ²-Bench TelecomNot measured94.2%Only Mistral Medium 3.5 measured
Neither model has a result on the other 34 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index50
Reasoning benchmarks for Gemini 4 Hydrogen and Mistral Medium 3.5
BenchmarkGemini 4 HydrogenMistral Medium 3.5Leader
GPQA DiamondNot measured34.9%Only Mistral Medium 3.5 measured
LiveBench reasoning88.6%Not measuredOnly Gemini 4 Hydrogen measured
GPQA Diamond (Artificial Analysis run)Not measured74.8%Only Mistral Medium 3.5 measured
Humanity's Last Exam (Artificial Analysis run)Not measured13.8%Only Mistral Medium 3.5 measured
HLE-Diamond (Artificial Analysis run)58.8%4.7%Gemini 4 Hydrogen
CritPt v2, hard subset (Artificial Analysis run)66.0%0.5%Gemini 4 Hydrogen
LMArena Text: hard prompts15201436Gemini 4 Hydrogen
LMArena Text: expert15581431Gemini 4 Hydrogen
LMArena Text: hard prompts in English15141444Gemini 4 Hydrogen
LMArena Vision: diagramsNot measured1255Only Mistral Medium 3.5 measured
LMArena Vision: homeworkNot measured1229Only Mistral Medium 3.5 measured
Kagi LLM BenchmarkNot measured41.4%Only Mistral Medium 3.5 measured
Neither model has a result on the other 14 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index20
Math benchmarks for Gemini 4 Hydrogen and Mistral Medium 3.5
BenchmarkGemini 4 HydrogenMistral Medium 3.5Leader
ProofBenchNot measured9.0%Only Mistral Medium 3.5 measured
LMArena Text: math15071430Gemini 4 Hydrogen
LMArena Text: mathematical work15341440Gemini 4 Hydrogen
Neither model has a result on the other 11 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index50
Knowledge benchmarks for Gemini 4 Hydrogen and Mistral Medium 3.5
BenchmarkGemini 4 HydrogenMistral Medium 3.5Leader
MMLU ProNot measured75.3%Only Mistral Medium 3.5 measured
CaseLaw (Vals AI)Not measured44.2%Only Mistral Medium 3.5 measured
CorpFin (Vals AI)Not measured58.8%Only Mistral Medium 3.5 measured
TaxEval (Vals AI)Not measured68.0%Only Mistral Medium 3.5 measured
MortgageTax (Vals AI)Not measured28.9%Only Mistral Medium 3.5 measured
MedCode (Vals AI)Not measured33.8%Only Mistral Medium 3.5 measured
AA-Omniscience46.3-38.7Gemini 4 Hydrogen
LMArena Text: science15191428Gemini 4 Hydrogen
LMArena Text: medicine and healthcare14881407Gemini 4 Hydrogen
LMArena Text: legal and government15321437Gemini 4 Hydrogen
LMArena Text: business and finance14861426Gemini 4 Hydrogen
Neither model has a result on the other 10 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index40
Web design benchmarks for Gemini 4 Hydrogen and Mistral Medium 3.5
BenchmarkGemini 4 HydrogenMistral Medium 3.5Leader
Design Arena: websites13201134Gemini 4 Hydrogen
Design Arena: UI componentsNot measured1069Only Mistral Medium 3.5 measured
Design Arena: game dev13691069Gemini 4 Hydrogen
Design Arena: data vizNot measured1117Only Mistral Medium 3.5 measured
Design Arena: 3D14151040Gemini 4 Hydrogen
Design Arena: all code categories13331111Gemini 4 Hydrogen
Design Arena: SVGNot measured939Only Mistral Medium 3.5 measured
Design Arena: ASCII artNot measured1057Only Mistral Medium 3.5 measured
LiveBench design77.3%Not measuredOnly Gemini 4 Hydrogen measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index130
General benchmarks for Gemini 4 Hydrogen and Mistral Medium 3.5
BenchmarkGemini 4 HydrogenMistral Medium 3.5Leader
Vals Index68.5%Not measuredOnly Gemini 4 Hydrogen measured
LiveBench data analysis83.2%Not measuredOnly Gemini 4 Hydrogen measured
SAGE (Vals AI)Not measured72.0%Only Mistral Medium 3.5 measured
MedScribe (Vals AI)Not measured67.7%Only Mistral Medium 3.5 measured
Vals Multimodal IndexNot measured34.8%Only Mistral Medium 3.5 measured
IFBenchNot measured68.8%Only Mistral Medium 3.5 measured
Long context reasoning (AA-LCR)Not measured69.3%Only Mistral Medium 3.5 measured
GDPval-AANot measured769Only Mistral Medium 3.5 measured
DTBenchNot measured75.5%Only Mistral Medium 3.5 measured
LMCANot measured26.1%Only Mistral Medium 3.5 measured
Surface Evolver BenchNot measured26.9%Only Mistral Medium 3.5 measured
LMArena Text15021421Gemini 4 Hydrogen
LMArena Text: instruction following15191416Gemini 4 Hydrogen
LMArena Text: creative writing15091374Gemini 4 Hydrogen
LMArena VisionNot measured1222Only Mistral Medium 3.5 measured
LMArena Text: English14991433Gemini 4 Hydrogen
LMArena Text: non-English14951405Gemini 4 Hydrogen
LMArena Text: Chinese16311444Gemini 4 Hydrogen
LMArena Text: GermanNot measured1460Only Mistral Medium 3.5 measured
LMArena Text: KoreanNot measured1383Only Mistral Medium 3.5 measured
LMArena Text: French15121448Gemini 4 Hydrogen
LMArena Text: Spanish14941412Gemini 4 Hydrogen
LMArena Text: Russian14921397Gemini 4 Hydrogen
LMArena Text: PolishNot measured1429Only Mistral Medium 3.5 measured
LMArena Text: multi-turn14851424Gemini 4 Hydrogen
LMArena Text: longer queries15241415Gemini 4 Hydrogen
LMArena Text: writing and language15001383Gemini 4 Hydrogen
LMArena Text: entertainment and media15031383Gemini 4 Hydrogen
LMArena Vision: EnglishNot measured1242Only Mistral Medium 3.5 measured
LMArena Vision: ChineseNot measured1245Only Mistral Medium 3.5 measured
LMArena Vision: reading textNot measured1233Only Mistral Medium 3.5 measured
LMArena Vision: humorNot measured1218Only Mistral Medium 3.5 measured
LMArena Vision: creative writingNot measured1199Only Mistral Medium 3.5 measured
EQ-Bench 4Not measured983Only Mistral Medium 3.5 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
Image generation benchmarks for Gemini 4 Hydrogen and Mistral Medium 3.5
BenchmarkGemini 4 HydrogenMistral Medium 3.5Leader
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

Gemini 4 Hydrogen$0.0053Fits in one request
Mistral Medium 3.5$0.0053Fits in one request

Same cost

Repository review

50K input + 3K output tokens

Gemini 4 Hydrogen$0.098Fits in one request
Mistral Medium 3.5$0.098Fits in one request

Same cost

Agent loop

200K input + 10K output tokens

Gemini 4 Hydrogen$0.375Fits in one request
Mistral Medium 3.5$0.375Fits in one request

Same cost

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.

Specifications of Gemini 4 Hydrogen and Mistral Medium 3.5
SpecificationGoogle Gemini 4 HydrogenMistral Medium 3.5
MakerGoogleMistral AI
WeightsNo public weights listedOpen weights
ReleasedNovember 12, 2026April 30, 2026
Context window1.05M262K
Input $/Mtok$1.50$1.50
Output $/Mtok$7.50$7.50
Coding index77.925.4
Independent measurements behind it43
Cost per solved taskNot computable$6.02
SourceOpenRouter listingOpenRouter listing

Questions

Is Gemini 4 Hydrogen better than Mistral Medium 3.5 for coding?

Pick Gemini 4 Hydrogen for coding: it scores 77.9 on the Vibe Coding Index against 25.4 for Mistral Medium 3.5. Mistral Medium 3.5 is neither cheaper nor larger in context, and leads no benchmark both models were measured on.

Which is cheaper, Gemini 4 Hydrogen or Mistral Medium 3.5?

Gemini 4 Hydrogen costs $1.50 per million input tokens and $7.50 per million output tokens; Mistral Medium 3.5 costs $1.50 and $7.50. Cost per solved task is known for Mistral Medium 3.5 only.

Which has the bigger context window, Gemini 4 Hydrogen or Mistral Medium 3.5?

Gemini 4 Hydrogen, with 1.05M tokens against 262K.

How many benchmarks is the Gemini 4 Hydrogen vs Mistral Medium 3.5 comparison based on?

39 benchmarks have a result for both models as of November 14, 2026. Gemini 4 Hydrogen's coding index rests on 4 independent benchmarks and Mistral Medium 3.5's on 3. Where only one model has a result, the page says so instead of naming a winner.

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