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DeepSeek V4 Flash 0423 vs Grok 4.5

Grok 4.5 leads DeepSeek V4 Flash 0423 on the Artificial Analysis Intelligence Index, 38.8 to 24.4, and DeepSeek V4 Flash 0423 costs 21.4x less per output token ($0.28 vs $6.00 per million). Updated October 22, 2026; 49 benchmarks have a result for both.

Replace DeepSeek V4 Flash 0423 Replace Grok 4.5
DeepSeek V4 Flash 0423DeepSeek
Coding
No data
Overall
No data
Output $/M
$0.28
4
Grok 4.5xAI
Coding
58.6
Overall
62.1
Output $/M
$6.00
45
vs boards won of 49 shared

DeepSeek V4 Flash 0423 or Grok 4.5: which to pick

Only Grok 4.5 has a coding score, 58.6 on the Vibe Coding Index; DeepSeek V4 Flash 0423 has none, so the two cannot be ranked on coding.

Pick DeepSeek V4 Flash 0423 for output tokens 21.4x cheaper ($0.28 vs $6.00 per million) and a larger context window (1.05M against 500K tokens).

Model ADeepSeek V4 Flash 0423DeepSeekNot benchmarked1 independent benchmarkNo cost per solved taskModel BGrok 4.5xAI58.6/1006 independent benchmarks$0.62 per solved task
Shared results
49
DeepSeek V4 Flash 0423 only
0
Grok 4.5 only
74
Like-for-like categories
8 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
DeepSeek V4 Flash 0423 not benchmarked, Grok 4.5 58.6 from 6 benchmarks.
Widest category
Agentic work, 14.9 points apart on average over 1 shared benchmark.
Widest single gap
Kagi LLM Benchmark: DeepSeek V4 Flash 0423 52.2% against Grok 4.5 83.5%, 31.3 points apart on a 0 to 100 scale.
Output price
DeepSeek V4 Flash 0423 $0.28 against Grok 4.5 $6.00 per million output tokens, 21.4x apart.
Context window
DeepSeek V4 Flash 0423 takes 1.05M tokens, Grok 4.5 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 4.5Ties
Coding26
Intelligence02
Agentic work01
Reasoning05
Math02
Knowledge13
Web design08
General118
All shared boards445
CodingLike-for-likeSix of these boards feed the Vibe Coding Index26
Coding benchmarks for DeepSeek V4 Flash 0423 and Grok 4.5
BenchmarkDeepSeek V4 Flash 0423Grok 4.5Leader
LiveBench codingNot measured94.3%Only Grok 4.5 measured
LMArena WebDev15821553DeepSeek V4 Flash 0423
AA Coding Index52.072.4Grok 4.5
LiveCodeBench (Vals AI)Not measured87.3%Only Grok 4.5 measured
SWE-bench Verified (Vals AI)Not measured86.6%Only Grok 4.5 measured
Terminal-Bench 4 (Vals AI)Not measured8.6%Only Grok 4.5 measured
Vibe Code Bench (Vals AI)Not measured69.0%Only Grok 4.5 measured
Code migration (Vals AI)Not measured36.6%Only Grok 4.5 measured
ProgramBench (Vals AI)Not measured0.0%Only Grok 4.5 measured
IOI (Vals AI)Not measured40.6%Only Grok 4.5 measured
Terminal-Bench 2.1 (Vals AI)Not measured67.8%Only Grok 4.5 measured
SkillsBench (Vals AI)Not measured66.0%Only Grok 4.5 measured
CyberBench (Vals AI)Not measured71.0%Only Grok 4.5 measured
SciCodeNot measured55.0%Only Grok 4.5 measured
FrontierCodeNot measured42.4%Only Grok 4.5 measured
WeirdML45.6%46.4%Grok 4.5
ALE-Bench678.21309.3Grok 4.5
LMArena Text: coding14571474Grok 4.5
LMArena Text: software and IT14531471Grok 4.5
LMArena WebDev: React15851556DeepSeek V4 Flash 0423
LMArena WebDev: HTML15581567Grok 4.5
LMArena WebDev: from an imageNot measured1562Only Grok 4.5 measured
SciCodeNot measured6.5%Only Grok 4.5 measured
Neither model has a result on the other 16 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
Intelligence benchmarks for DeepSeek V4 Flash 0423 and Grok 4.5
BenchmarkDeepSeek V4 Flash 0423Grok 4.5Leader
AA Intelligence Index24.438.8Grok 4.5
Epoch Capabilities Index146.1154.1Grok 4.5
Agentic workLike-for-likePublic boards, shown as published, kept out of the index01
Agentic work benchmarks for DeepSeek V4 Flash 0423 and Grok 4.5
BenchmarkDeepSeek V4 Flash 0423Grok 4.5Leader
AA Agentic Index26.341.2Grok 4.5
Design Arena: agents building web appsNot measured1218Only Grok 4.5 measured
Design Arena: agents building full-stack appsNot measured1249Only Grok 4.5 measured
Design Arena: agents building mobile appsNot measured1220Only Grok 4.5 measured
Design Arena: agents building Android appsNot measured1236Only Grok 4.5 measured
Design Arena: agents building Godot gamesNot measured1229Only Grok 4.5 measured
Design Arena: agents building gamesNot measured1236Only Grok 4.5 measured
Design Arena: HTML slidesNot measured1205Only Grok 4.5 measured
Design Arena: PowerPoint slidesNot measured1230Only Grok 4.5 measured
LiveBench researchNot measured85.9%Only Grok 4.5 measured
LiveBench browserNot measured44.0%Only Grok 4.5 measured
LiveBench long agenticNot measured27.9%Only Grok 4.5 measured
SREBench (Vals AI)Not measured0.8%Only Grok 4.5 measured
Finance Agent (Vals AI)Not measured48.4%Only Grok 4.5 measured
Tax Agent Bench (Vals AI)Not measured24.9%Only Grok 4.5 measured
Legal Research Bench (Vals AI)Not measured38.0%Only Grok 4.5 measured
Excel Modeling Benchmark (Vals AI)Not measured52.9%Only Grok 4.5 measured
Time Horizon Index (Vals AI)Not measured6.3%Only Grok 4.5 measured
APEX-AgentsNot measured56.2%Only Grok 4.5 measured
PostTrainBenchNot measured23.4%Only Grok 4.5 measured
Vending-Bench 2Not measured$3,887Only Grok 4.5 measured
LMArena SearchNot measured1216Only Grok 4.5 measured
Neither model has a result on the other 19 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index05
Reasoning benchmarks for DeepSeek V4 Flash 0423 and Grok 4.5
BenchmarkDeepSeek V4 Flash 0423Grok 4.5Leader
GPQA DiamondNot measured92.9%Only Grok 4.5 measured
LiveBench reasoningNot measured87.2%Only Grok 4.5 measured
MMMU Pro (Vals AI)Not measured61.8%Only Grok 4.5 measured
GPQA Diamond (Artificial Analysis run)Not measured93.1%Only Grok 4.5 measured
Humanity's Last Exam (Artificial Analysis run)Not measured42.7%Only Grok 4.5 measured
GPQA Diamond (Epoch AI run)Not measured93.4%Only Grok 4.5 measured
ARC-AGINot measured87.2%Only Grok 4.5 measured
ARC-AGI-2Not measured52.6%Only Grok 4.5 measured
SimpleBench46.3%70.0%Grok 4.5
Chess puzzlesNot measured35.0%Only Grok 4.5 measured
LMArena Text: hard prompts14441462Grok 4.5
LMArena Text: expert14411465Grok 4.5
LMArena Text: hard prompts in English14491464Grok 4.5
LMArena Vision: diagramsNot measured1304Only Grok 4.5 measured
LMArena Vision: homeworkNot measured1295Only Grok 4.5 measured
Kagi LLM Benchmark52.2%83.5%Grok 4.5
Neither model has a result on the other 6 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index02
Math benchmarks for DeepSeek V4 Flash 0423 and Grok 4.5
BenchmarkDeepSeek V4 Flash 0423Grok 4.5Leader
OTIS Mock AIMENot measured97.8%Only Grok 4.5 measured
FrontierMath, tiers 1 to 3Not measured57.2%Only Grok 4.5 measured
FrontierMath, tier 4Not measured24.4%Only Grok 4.5 measured
ProofBenchNot measured31.0%Only Grok 4.5 measured
LMArena Text: math14261460Grok 4.5
LMArena Text: mathematical work14321482Grok 4.5
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index13
Knowledge benchmarks for DeepSeek V4 Flash 0423 and Grok 4.5
BenchmarkDeepSeek V4 Flash 0423Grok 4.5Leader
MMLU ProNot measured89.2%Only Grok 4.5 measured
LegalBench (Vals AI)Not measured86.0%Only Grok 4.5 measured
CorpFin (Vals AI)Not measured67.4%Only Grok 4.5 measured
TaxEval (Vals AI)Not measured71.7%Only Grok 4.5 measured
MortgageTax (Vals AI)Not measured61.8%Only Grok 4.5 measured
MedCode (Vals AI)Not measured43.3%Only Grok 4.5 measured
SimpleQA VerifiedNot measured48.3%Only Grok 4.5 measured
LMArena Text: science14461464Grok 4.5
LMArena Text: medicine and healthcare14481440DeepSeek V4 Flash 0423
LMArena Text: legal and government14391463Grok 4.5
LMArena Text: business and finance14251441Grok 4.5
FACTS Benchmark SuiteNot measured50.2%Only Grok 4.5 measured
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 4.5
BenchmarkDeepSeek V4 Flash 0423Grok 4.5Leader
Design Arena: websites12071281Grok 4.5
Design Arena: UI components11621280Grok 4.5
Design Arena: game dev11961264Grok 4.5
Design Arena: data viz11271266Grok 4.5
Design Arena: 3D11881257Grok 4.5
Design Arena: all code categories12051275Grok 4.5
Design Arena: SVG11551215Grok 4.5
Design Arena: ASCII art11091256Grok 4.5
LiveBench designNot measured78.1%Only Grok 4.5 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index118
General benchmarks for DeepSeek V4 Flash 0423 and Grok 4.5
BenchmarkDeepSeek V4 Flash 0423Grok 4.5Leader
LiveBench data analysisNot measured73.0%Only Grok 4.5 measured
SAGE (Vals AI)Not measured35.0%Only Grok 4.5 measured
MedScribe (Vals AI)Not measured86.9%Only Grok 4.5 measured
Vals Multimodal IndexNot measured63.4%Only Grok 4.5 measured
Long context reasoning (AA-LCR)Not measured79.3%Only Grok 4.5 measured
DTBench86.4%96.5%Grok 4.5
LMCA35.9%45.2%Grok 4.5
Surface Evolver BenchNot measured74.4%Only Grok 4.5 measured
Furniture assemblyNot measured22.5%Only Grok 4.5 measured
LMArena Text14321448Grok 4.5
LMArena Text: instruction following14211445Grok 4.5
LMArena Text: creative writing14031442Grok 4.5
LMArena VisionNot measured1287Only Grok 4.5 measured
LMArena Text: English14411453Grok 4.5
LMArena Text: non-English14191440Grok 4.5
LMArena Text: Chinese14631495Grok 4.5
LMArena Text: German14191448Grok 4.5
LMArena Text: Japanese13891430Grok 4.5
LMArena Text: Korean13831406Grok 4.5
LMArena Text: French14391457Grok 4.5
LMArena Text: Spanish14361451Grok 4.5
LMArena Text: Russian14271449Grok 4.5
LMArena Text: Polish14361432DeepSeek V4 Flash 0423
LMArena Text: multi-turn14491456Grok 4.5
LMArena Text: longer queries14341462Grok 4.5
LMArena Text: writing and language14101445Grok 4.5
LMArena Text: entertainment and media14001434Grok 4.5
LMArena Vision: EnglishNot measured1285Only Grok 4.5 measured
LMArena Vision: ChineseNot measured1345Only Grok 4.5 measured
LMArena Vision: reading textNot measured1293Only Grok 4.5 measured
LMArena Vision: humorNot measured1276Only Grok 4.5 measured
LMArena Vision: creative writingNot measured1293Only Grok 4.5 measured
LMArena DocumentNot measured1452Only Grok 4.5 measured
Neither model has a result on the other 13 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 4.5
BenchmarkDeepSeek V4 Flash 0423Grok 4.5Leader
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

DeepSeek V4 Flash 0423$0.0003Fits in one request
Grok 4.5$0.0050Fits in one request

DeepSeek V4 Flash 0423 costs less

Repository review

50K input + 3K output tokens

DeepSeek V4 Flash 0423$0.0078Fits in one request
Grok 4.5$0.118Fits in one request

DeepSeek V4 Flash 0423 costs less

Agent loop

200K input + 10K output tokens

DeepSeek V4 Flash 0423$0.031Fits in one request
Grok 4.5$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 4.5
SpecificationDeepSeek V4 Flash 0423SpaceXAI Grok 4.5
MakerDeepSeekxAI
WeightsOpen weightsNo public weights listed
ReleasedApril 24, 2026July 8, 2026
Context window1.05M500K
Input $/Mtok$0.14$2.00
Output $/Mtok$0.28$6.00
Coding indexNot benchmarked58.6
Independent measurements behind it16
Cost per solved taskNot computable$0.62
SourceOpenRouter listingOpenRouter listing

Questions

Is DeepSeek V4 Flash 0423 better than Grok 4.5 for coding?

Only Grok 4.5 has a coding score, 58.6 on the Vibe Coding Index; DeepSeek V4 Flash 0423 has none, so the two cannot be ranked on coding. Pick DeepSeek V4 Flash 0423 for output tokens 21.4x cheaper ($0.28 vs $6.00 per million) and a larger context window (1.05M against 500K tokens).

Which is cheaper, DeepSeek V4 Flash 0423 or Grok 4.5?

DeepSeek V4 Flash 0423 costs $0.14 per million input tokens and $0.28 per million output tokens; Grok 4.5 costs $2.00 and $6.00. Cost per solved task is known for Grok 4.5 only.

Which has the bigger context window, DeepSeek V4 Flash 0423 or Grok 4.5?

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

How many benchmarks is the DeepSeek V4 Flash 0423 vs Grok 4.5 comparison based on?

49 benchmarks have a result for both models as of October 22, 2026. DeepSeek V4 Flash 0423's coding index rests on 1 independent benchmark and Grok 4.5's on 6. Where only one model has a result, the page says so instead of naming a winner.

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