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DeepSeek V4 Flash 0423 vs Grok 4.6

Updated October 21, 2026. 48 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace DeepSeek V4 Flash 0423 Replace Grok 4.6
DeepSeek V4 Flash 0423DeepSeek
Coding
54.6
Overall
24.4
Output $/M
$0.182
13
Grok 4.6xAI
Coding
76.4
Overall
44.3
Output $/M
$6.00
35
vs boards won of 48 shared

Decision reading

Pick Grok 4.6 for coding: it scores 76.4 on the Vibe Coding Index against 54.6 for DeepSeek V4 Flash 0423.

Pick DeepSeek V4 Flash 0423 when output tokens cost 33.0x less, or when the context window is larger, 1.05M against 500K tokens.

Model ADeepSeek V4 Flash 0423DeepSeek54.6/1001 independent benchmarkNo cost per solved taskModel BGrok 4.6xAI76.4/1002 independent benchmarks$0.82 per solved task
Shared results
48
DeepSeek V4 Flash 0423 only
0
Grok 4.6 only
75
Like-for-like categories
8 of 9

Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.

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
DeepSeek V4 Flash 0423 54.6 from 1 benchmark, Grok 4.6 76.4 from 2 benchmarks.
Widest category
Agentic work, 26.7 points apart on average over 1 shared benchmark.
Widest single gap
SimpleBench: DeepSeek V4 Flash 0423 46.3% against Grok 4.6 75.9%, 29.6 points apart on a 0 to 100 scale.
Output price
DeepSeek V4 Flash 0423 $0.182 against Grok 4.6 $6.00 per million output tokens, 33.0x apart.
Context window
DeepSeek V4 Flash 0423 takes 1.05M tokens, Grok 4.6 500K.

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
CategoryDeepSeek V4 Flash 0423BarsGrok 4.6Ties
Coding08
Intelligence02
Agentic work01
Reasoning13
Math11
Knowledge40
Web design08
General712
All shared boards1335
CodingLike-for-likeFour of these boards feed the Vibe Coding Index08
Coding benchmarks for DeepSeek V4 Flash 0423 and Grok 4.6
BenchmarkDeepSeek V4 Flash 0423Grok 4.6Leader
LiveBench codingNot measured89.1%Only Grok 4.6 measured
LMArena WebDev15821617Grok 4.6
AA Coding Index52.076.8Grok 4.6
LiveCodeBench (Vals AI)Not measured88.2%Only Grok 4.6 measured
SWE-bench Verified (Vals AI)Not measured95.6%Only Grok 4.6 measured
Terminal-Bench 4 (Vals AI)Not measured17.2%Only Grok 4.6 measured
Vibe Code Bench (Vals AI)Not measured76.2%Only Grok 4.6 measured
Code migration (Vals AI)Not measured44.6%Only Grok 4.6 measured
ProgramBench (Vals AI)Not measured1.0%Only Grok 4.6 measured
IOI (Vals AI)Not measured47.6%Only Grok 4.6 measured
Terminal-Bench 2.1 (Vals AI)Not measured78.3%Only Grok 4.6 measured
Vibe Code Bench 1-100 (Vals AI)Not measured14.8%Only Grok 4.6 measured
SkillsBench (Vals AI)Not measured55.8%Only Grok 4.6 measured
CyberBench (Vals AI)Not measured67.7%Only Grok 4.6 measured
SciCodeNot measured56.5%Only Grok 4.6 measured
FrontierCodeNot measured48.0%Only Grok 4.6 measured
FrontierSWENot measured25.3%Only Grok 4.6 measured
WeirdML45.6%67.3%Grok 4.6
ALE-Bench678.21508.1Grok 4.6
LMArena Text: coding14571466Grok 4.6
LMArena Text: software and IT14531457Grok 4.6
LMArena WebDev: React15851631Grok 4.6
LMArena WebDev: HTML15581597Grok 4.6
LMArena WebDev: from an imageNot measured1603Only Grok 4.6 measured
Neither model has a result on the other 14 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for DeepSeek V4 Flash 0423 and Grok 4.6
BenchmarkDeepSeek V4 Flash 0423Grok 4.6Leader
AA Intelligence Index24.444.3Grok 4.6
Epoch Capabilities Index146.1156.6Grok 4.6
Agentic workLike-for-likePublic boards, shown as published, kept out of the index01
Agentic work benchmarks for DeepSeek V4 Flash 0423 and Grok 4.6
BenchmarkDeepSeek V4 Flash 0423Grok 4.6Leader
AA Agentic Index26.353.0Grok 4.6
Design Arena: agents building web appsNot measured1247Only Grok 4.6 measured
Design Arena: agents building full-stack appsNot measured1264Only Grok 4.6 measured
Design Arena: agents building mobile appsNot measured1234Only Grok 4.6 measured
Design Arena: agents building Android appsNot measured1297Only Grok 4.6 measured
Design Arena: agents building Godot gamesNot measured1276Only Grok 4.6 measured
Design Arena: agents building gamesNot measured1208Only Grok 4.6 measured
Design Arena: HTML slidesNot measured1249Only Grok 4.6 measured
Design Arena: PowerPoint slidesNot measured1241Only Grok 4.6 measured
LiveBench researchNot measured84.5%Only Grok 4.6 measured
LiveBench browserNot measured64.0%Only Grok 4.6 measured
LiveBench long agenticNot measured40.7%Only Grok 4.6 measured
Finance Agent (Vals AI)Not measured53.7%Only Grok 4.6 measured
Tax Agent Bench (Vals AI)Not measured33.1%Only Grok 4.6 measured
Legal Research Bench (Vals AI)Not measured48.1%Only Grok 4.6 measured
Excel Modeling Benchmark (Vals AI)Not measured62.7%Only Grok 4.6 measured
BioMysteryBench (Vals AI)Not measured72.2%Only Grok 4.6 measured
Terminal-Bench-Science (Vals AI)Not measured11.4%Only Grok 4.6 measured
Vals Science IndexNot measured38.1%Only Grok 4.6 measured
Time Horizon Index (Vals AI)Not measured5.8%Only Grok 4.6 measured
APEX-AgentsNot measured65.3%Only Grok 4.6 measured
Vending-Bench 2Not measured$9,047Only Grok 4.6 measured
Neither model has a result on the other 17 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index13
Reasoning benchmarks for DeepSeek V4 Flash 0423 and Grok 4.6
BenchmarkDeepSeek V4 Flash 0423Grok 4.6Leader
GPQA DiamondNot measured94.7%Only Grok 4.6 measured
LiveBench reasoningNot measured91.2%Only Grok 4.6 measured
MysteryMechanism (Vals AI)Not measured30.6%Only Grok 4.6 measured
GPQA Diamond (Artificial Analysis run)Not measured94.9%Only Grok 4.6 measured
Humanity's Last Exam (Artificial Analysis run)Not measured44.1%Only Grok 4.6 measured
GPQA Diamond (Epoch AI run)Not measured94.0%Only Grok 4.6 measured
ARC-AGINot measured87.5%Only Grok 4.6 measured
ARC-AGI-2Not measured67.1%Only Grok 4.6 measured
SimpleBench46.3%75.9%Grok 4.6
Chess puzzlesNot measured33.0%Only Grok 4.6 measured
Mystery game puzzlesNot measured34.0%Only Grok 4.6 measured
EBR-benchNot measured30.5%Only Grok 4.6 measured
LMArena Text: hard prompts14441448Grok 4.6
LMArena Text: expert14411469Grok 4.6
LMArena Text: hard prompts in English14491445DeepSeek V4 Flash 0423
LMArena Vision: diagramsNot measured1285Only Grok 4.6 measured
LMArena Vision: homeworkNot measured1283Only Grok 4.6 measured
Neither model has a result on the other 4 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index11
Math benchmarks for DeepSeek V4 Flash 0423 and Grok 4.6
BenchmarkDeepSeek V4 Flash 0423Grok 4.6Leader
OTIS Mock AIMENot measured99.2%Only Grok 4.6 measured
FrontierMath, tiers 1 to 3Not measured66.0%Only Grok 4.6 measured
FrontierMath, tier 4Not measured31.7%Only Grok 4.6 measured
ProofBenchNot measured51.0%Only Grok 4.6 measured
LMArena Text: math14261417DeepSeek V4 Flash 0423
LMArena Text: mathematical work14321464Grok 4.6
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index40
Knowledge benchmarks for DeepSeek V4 Flash 0423 and Grok 4.6
BenchmarkDeepSeek V4 Flash 0423Grok 4.6Leader
MMLU ProNot measured89.4%Only Grok 4.6 measured
LegalBench (Vals AI)Not measured86.3%Only Grok 4.6 measured
CorpFin (Vals AI)Not measured66.2%Only Grok 4.6 measured
TaxEval (Vals AI)Not measured71.1%Only Grok 4.6 measured
MortgageTax (Vals AI)Not measured64.2%Only Grok 4.6 measured
MedCode (Vals AI)Not measured44.7%Only Grok 4.6 measured
SimpleQA VerifiedNot measured49.3%Only Grok 4.6 measured
LMArena Text: science14461437DeepSeek V4 Flash 0423
LMArena Text: medicine and healthcare14481420DeepSeek V4 Flash 0423
LMArena Text: legal and government14391429DeepSeek V4 Flash 0423
LMArena Text: business and finance14251416DeepSeek V4 Flash 0423
Neither model has a result on the other 6 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index08
Web design benchmarks for DeepSeek V4 Flash 0423 and Grok 4.6
BenchmarkDeepSeek V4 Flash 0423Grok 4.6Leader
Design Arena: websites12081289Grok 4.6
Design Arena: UI components11641294Grok 4.6
Design Arena: game dev11971296Grok 4.6
Design Arena: data viz11271283Grok 4.6
Design Arena: 3D11891277Grok 4.6
Design Arena: all code categories12051292Grok 4.6
Design Arena: SVG11551239Grok 4.6
Design Arena: ASCII art11091278Grok 4.6
LiveBench designNot measured79.8%Only Grok 4.6 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index712
General benchmarks for DeepSeek V4 Flash 0423 and Grok 4.6
BenchmarkDeepSeek V4 Flash 0423Grok 4.6Leader
LiveBench data analysisNot measured75.3%Only Grok 4.6 measured
Public Benefits Bench (Vals AI)Not measured66.8%Only Grok 4.6 measured
SAGE (Vals AI)Not measured28.9%Only Grok 4.6 measured
MedScribe (Vals AI)Not measured86.5%Only Grok 4.6 measured
Long context reasoning (AA-LCR)Not measured81.0%Only Grok 4.6 measured
DTBench86.4%97.3%Grok 4.6
LMCA35.9%48.5%Grok 4.6
Furniture assemblyNot measured40.0%Only Grok 4.6 measured
LMArena Text14321429DeepSeek V4 Flash 0423
LMArena Text: instruction following14211431Grok 4.6
LMArena Text: creative writing14031426Grok 4.6
LMArena VisionNot measured1263Only Grok 4.6 measured
LMArena Text: English14411433DeepSeek V4 Flash 0423
LMArena Text: non-English14191420Grok 4.6
LMArena Text: Chinese14631476Grok 4.6
LMArena Text: German14191426Grok 4.6
LMArena Text: Japanese13891378DeepSeek V4 Flash 0423
LMArena Text: Korean13831391Grok 4.6
LMArena Text: French14391455Grok 4.6
LMArena Text: Spanish14361414DeepSeek V4 Flash 0423
LMArena Text: Russian14271421DeepSeek V4 Flash 0423
LMArena Text: Polish14361430DeepSeek V4 Flash 0423
LMArena Text: multi-turn14491425DeepSeek V4 Flash 0423
LMArena Text: longer queries14341456Grok 4.6
LMArena Text: writing and language14101429Grok 4.6
LMArena Text: entertainment and media14001421Grok 4.6
LMArena Vision: EnglishNot measured1270Only Grok 4.6 measured
LMArena Vision: ChineseNot measured1289Only Grok 4.6 measured
LMArena Vision: reading textNot measured1272Only Grok 4.6 measured
LMArena Vision: humorNot measured1270Only Grok 4.6 measured
LMArena Vision: creative writingNot measured1262Only Grok 4.6 measured
LMArena DocumentNot measured1452Only Grok 4.6 measured
Neither model has a result on the other 14 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for DeepSeek V4 Flash 0423 and Grok 4.6
BenchmarkDeepSeek V4 Flash 0423Grok 4.6Leader
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 Flash 0423$0.0002Fits in one request
Grok 4.6$0.0050Fits in one request

DeepSeek V4 Flash 0423 costs less

Repository review

50K input + 3K output tokens

DeepSeek V4 Flash 0423$0.0051Fits in one request
Grok 4.6$0.118Fits in one request

DeepSeek V4 Flash 0423 costs less

Agent loop

200K input + 10K output tokens

DeepSeek V4 Flash 0423$0.020Fits in one request
Grok 4.6$0.460Fits in one request

DeepSeek V4 Flash 0423 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.

Specifications of DeepSeek V4 Flash 0423 and Grok 4.6
SpecificationDeepSeek V4 Flash 0423SpaceXAI Grok 4.6
MakerDeepSeekxAI
WeightsOpen weightsNo public weights listed
ReleasedApril 24, 2026August 12, 2026
Context window1.05M500K
Input $/Mtok$0.091$2.00
Output $/Mtok$0.182$6.00
Coding index54.676.4
Independent measurements behind it12
Cost per solved taskNot computable$0.82
SourceOpenRouter listingOpenRouter listing

Questions

Is DeepSeek V4 Flash 0423 better than Grok 4.6 for coding?

Pick Grok 4.6 for coding: it scores 76.4 on the Vibe Coding Index against 54.6 for DeepSeek V4 Flash 0423. Pick DeepSeek V4 Flash 0423 when output tokens cost 33.0x less, or when the context window is larger, 1.05M against 500K tokens.

Which is cheaper, DeepSeek V4 Flash 0423 or Grok 4.6?

DeepSeek V4 Flash 0423 costs $0.091 per million input tokens and $0.182 per million output tokens; Grok 4.6 costs $2.00 and $6.00. Cost per solved task is known for Grok 4.6 only.

Which has the bigger context window, DeepSeek V4 Flash 0423 or Grok 4.6?

DeepSeek V4 Flash 0423, with 1.05M tokens against 500K.

How many benchmarks is the DeepSeek V4 Flash 0423 vs Grok 4.6 comparison based on?

48 benchmarks have a result for both models as of October 21, 2026. DeepSeek V4 Flash 0423's coding index rests on 1 independent benchmark and Grok 4.6's on 2. Where only one model has a result, the page says so instead of naming a winner.

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