Noometry

Model comparison

DeepSeek V4 Flash vs Grok 4.3

DeepSeek V4 Flash is the stronger model overall, scoring 53.6 to 43.8 on the Noometry Index.

Last verified . 33 shared benchmarks.

DeepSeek V4 Flash DeepSeek

53.6

Rank #35 Confirmed

Grok 4.3 xAI

43.8

Rank #86 Confirmed

Summary

  • They share 33 benchmarks with published results for both. DeepSeek V4 Flash scores higher in 8 categories and Grok 4.3 in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where DeepSeek V4 Flash leads 53.7 to 35.9.
  • The biggest single-benchmark swing is ProofBench: 56% for DeepSeek V4 Flash and 11% for Grok 4.3.
  • DeepSeek V4 Flash is cheaper at $0.15 / $0.60 per million input/output tokens, against $1.25 / $2.50 for Grok 4.3.
  • DeepSeek V4 Flash has downloadable open weights; the other is API-only.

Side by side

DeepSeek V4 FlashGrok 4.3
ProviderDeepSeekxAI
Noometry Index53.643.8
Released2026-04-242026-04-17
WeightsOpenProprietary
Context window1M1M
Max output393K30K
Input $ / M tokens$0.15$1.25
Output $ / M tokens$0.60$2.50
Results tracked4140

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Category by category

Coding DeepSeek V4 Flash leads

DeepSeek V4 Flash: 47.9 (#59), Grok 4.3: 41.6 (#121)

BenchmarkDeepSeek V4 FlashGrok 4.3
LMArena WebDev15821357
SciCode49.9%47.3%
WeirdML63%49.9%
LMArena Coding14571415
ALE-Bench1,306944.17
FrontierCode18.8%—

Agentic & Tool Use Not comparable

DeepSeek V4 Flash: —, Grok 4.3: 27.7 (#99)

BenchmarkDeepSeek V4 FlashGrok 4.3
GDP.pdf—8%
LMArena Search—1165
Vending-Bench 2—35.26

Reasoning DeepSeek V4 Flash leads

DeepSeek V4 Flash: 53.7 (#30), Grok 4.3: 35.9 (#68)

BenchmarkDeepSeek V4 FlashGrok 4.3
NYT Connections (extended)89.6%55.2%
CritPt16.6%8%
Chess Puzzles33%25%
LMArena Hard Prompts14441396
DTBench90.9%90.7%
LMCA41.7%38.3%
Epoch Capabilities Index154.49149.16
ARC-AGI-261.4%—
SimpleBench61.1%—
Kagi LLM Benchmark52.2%—
ARC-AGI-189%—
Mystery Game Puzzles34%—
ForecastBench—60.3

Math DeepSeek V4 Flash leads

DeepSeek V4 Flash: 60.3 (#37), Grok 4.3: 46.0 (#74)

BenchmarkDeepSeek V4 FlashGrok 4.3
FrontierMath (Tiers 1-3)57.5%42.8%
FrontierMath Tier 424.4%14.6%
OTIS Mock AIME 2024-202594.4%93.3%
ProofBench56%11%
LMArena Math14271388
MathArena Final-Answer Competitions76.5%—

Knowledge DeepSeek V4 Flash leads

DeepSeek V4 Flash: 55.4 (#48), Grok 4.3: 52.5 (#62)

BenchmarkDeepSeek V4 FlashGrok 4.3
GPQA Diamond91%88.8%
SimpleQA Verified33.6%33.2%
LMArena Expert14411385

Multimodal Not comparable

DeepSeek V4 Flash: —, Grok 4.3: 31.6 (#104)

BenchmarkDeepSeek V4 FlashGrok 4.3
LMArena Vision—1229
Blueprint-Bench 2—0%

Multilingual DeepSeek V4 Flash leads

DeepSeek V4 Flash: 53.0 (#72), Grok 4.3: 50.5 (#120)

BenchmarkDeepSeek V4 FlashGrok 4.3
LMArena Non-English14201385
LMArena Chinese14681422
LMArena French14391412
LMArena German14181395
LMArena Japanese14061379
LMArena Korean13841356
LMArena Russian14281399
LMArena Spanish14361398

Instruction Following DeepSeek V4 Flash leads

DeepSeek V4 Flash: 74.9 (#81), Grok 4.3: 72.1 (#140)

BenchmarkDeepSeek V4 FlashGrok 4.3
LMArena Instruction Following14211366

Long Context DeepSeek V4 Flash leads

DeepSeek V4 Flash: 43.8 (#85), Grok 4.3: 42.5 (#123)

BenchmarkDeepSeek V4 FlashGrok 4.3
LMArena Longer Query14341393

Writing & Preference DeepSeek V4 Flash leads

DeepSeek V4 Flash: 63.8 (#61), Grok 4.3: 58.5 (#118)

BenchmarkDeepSeek V4 FlashGrok 4.3
LMArena Text14321397
LMArena Creative Writing14031380
LMArena Multi-Turn14491406
EQ-Bench Creative Writing1559—
EQ-Bench 4—1075

Frequently asked questions

Is DeepSeek V4 Flash better than Grok 4.3?

DeepSeek V4 Flash is the stronger model overall, scoring 53.6 to 43.8 on the Noometry Index.

Which is cheaper, DeepSeek V4 Flash or Grok 4.3?

DeepSeek V4 Flash is cheaper. It lists at $0.15 per million input tokens and $0.60 per million output tokens; Grok 4.3 lists at $1.25 and $2.50.

Is DeepSeek V4 Flash or Grok 4.3 better for coding?

DeepSeek V4 Flash scores higher on coding benchmarks: 47.9 versus 41.6 in the Noometry coding category.

Which has the bigger context window?

Both accept 1M tokens.

How many benchmarks do DeepSeek V4 Flash and Grok 4.3 share?

33 benchmarks have published results for both models. DeepSeek V4 Flash has 41 scored results on Noometry and Grok 4.3 has 40.

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