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Grok 4.20 vs MiniMax M3

MiniMax M3 leads Grok 4.20 on coding, 39.2 to 33.3 on the Vibe Coding Index, and MiniMax M3 costs 2.1x less per output token ($1.20 vs $2.50 per million). Updated October 22, 2026; 44 benchmarks have a result for both.

Replace Grok 4.20 Replace MiniMax M3
Grok 4.20xAI
Coding
33.3
Overall
41.0
Output $/M
$2.50
12
MiniMax M3MiniMax
Coding
39.2
Overall
51.7
Output $/M
$1.20
32
vs boards won of 44 shared

Grok 4.20 or MiniMax M3: which to pick

Pick MiniMax M3 for coding: it scores 39.2 on the Vibe Coding Index against 33.3 for Grok 4.20.

Pick Grok 4.20 for a larger context window (2M against 1.05M tokens) and work measured by LiveCodeBench (Vals AI) or Epoch Capabilities Index, where it leads.

Model AGrok 4.20xAI33.3/1002 independent benchmarks$0.72 per solved taskModel BMiniMax M3MiniMax39.2/1006 independent benchmarks$0.56 per solved task
Shared results
44
Grok 4.20 only
11
MiniMax M3 only
72
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
Grok 4.20 33.3 from 2 benchmarks, MiniMax M3 39.2 from 6 benchmarks.
Widest category
Agentic work, 14.6 points apart on average over 11 shared benchmarks.
Widest single gap
Vibe Code Bench (Vals AI): Grok 4.20 4.1% against MiniMax M3 47.6%, 43.5 points apart on a 0 to 100 scale.
Output price
Grok 4.20 $2.50 against MiniMax M3 $1.20 per million output tokens, 2.1x apart.
Context window
Grok 4.20 takes 2M tokens, MiniMax M3 1.05M.

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
CategoryGrok 4.20BarsMiniMax M3Ties
Coding15
Intelligence11
Agentic work38
Reasoning13
Knowledge24
Web design26
General25
All shared boards1232
CodingLike-for-likeSix of these boards feed the Vibe Coding Index15
Coding benchmarks for Grok 4.20 and MiniMax M3
BenchmarkGrok 4.20MiniMax M3Leader
LiveBench codingNot measured70.9%Only MiniMax M3 measured
LMArena WebDevNot measured1482Only MiniMax M3 measured
AA Coding IndexNot measured58.6Only MiniMax M3 measured
LiveCodeBench (Vals AI)84.3%82.2%Grok 4.20
SWE-bench Verified (Vals AI)72.2%75.0%MiniMax M3
Terminal-Bench 4 (Vals AI)Not measured1.0%Only MiniMax M3 measured
Vibe Code Bench (Vals AI)4.1%47.6%MiniMax M3
Code migration (Vals AI)0.3%19.9%MiniMax M3
Terminal-Bench 2.1 (Vals AI)44.2%53.6%MiniMax M3
SWE-bench Multimodal (Vals AI)Not measured33.3%Only MiniMax M3 measured
Vibe Code Bench 1-100 (Vals AI)Not measured9.2%Only MiniMax M3 measured
SkillsBench (Vals AI)Not measured51.5%Only MiniMax M3 measured
CyberBench (Vals AI)Not measured65.0%Only MiniMax M3 measured
SciCodeNot measured47.1%Only MiniMax M3 measured
Terminal-Bench Hard (Artificial Analysis run)37.9%42.4%MiniMax M3
Terminal-Bench57.3%Not measuredOnly Grok 4.20 measured
FrontierCodeNot measured14.7%Only MiniMax M3 measured
WeirdML52.3%Not measuredOnly Grok 4.20 measured
ALE-BenchNot measured640.0Only MiniMax M3 measured
LMArena Text: codingNot measured1470Only MiniMax M3 measured
LMArena Text: software and ITNot measured1466Only MiniMax M3 measured
LMArena WebDev: ReactNot measured1478Only MiniMax M3 measured
LMArena WebDev: HTMLNot measured1455Only MiniMax M3 measured
LMArena WebDev: from an imageNot measured1470Only MiniMax M3 measured
Neither model has a result on the other 15 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index11
Intelligence benchmarks for Grok 4.20 and MiniMax M3
BenchmarkGrok 4.20MiniMax M3Leader
AA Intelligence Index25.729.2MiniMax M3
Epoch Capabilities Index152.1146.9Grok 4.20
Agentic workLike-for-likePublic boards, shown as published, kept out of the index38
Agentic work benchmarks for Grok 4.20 and MiniMax M3
BenchmarkGrok 4.20MiniMax M3Leader
AA Agentic IndexNot measured29.5Only MiniMax M3 measured
Design Arena: agents building web apps11441200MiniMax M3
Design Arena: agents building full-stack apps10541197MiniMax M3
Design Arena: agents building mobile apps10901169MiniMax M3
Design Arena: agents building Android apps10451159MiniMax M3
Design Arena: agents building Godot games1089Not measuredOnly Grok 4.20 measured
Design Arena: agents building gamesNot measured1158Only MiniMax M3 measured
Design Arena: HTML slides11801130Grok 4.20
Design Arena: PowerPoint slidesNot measured1181Only MiniMax M3 measured
Design Arena: spreadsheetsNot measured1028Only MiniMax M3 measured
LiveBench researchNot measured68.0%Only MiniMax M3 measured
LiveBench browserNot measured8.0%Only MiniMax M3 measured
LiveBench long agenticNot measured12.4%Only MiniMax M3 measured
Finance Agent (Vals AI)28.5%48.3%MiniMax M3
Tax Agent Bench (Vals AI)7.0%20.6%MiniMax M3
Legal Research Bench (Vals AI)13.9%29.8%MiniMax M3
Excel Modeling Benchmark (Vals AI)11.7%47.8%MiniMax M3
τ²-Bench Telecom93.0%88.9%Grok 4.20
APEX-AgentsNot measured37.7%Only MiniMax M3 measured
OSWorld 2.0Not measured4.6%Only MiniMax M3 measured
Vending-Bench 2$4,663$2,158Grok 4.20
Neither model has a result on the other 20 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index13
Reasoning benchmarks for Grok 4.20 and MiniMax M3
BenchmarkGrok 4.20MiniMax M3Leader
GPQA Diamond88.6%92.7%MiniMax M3
LiveBench reasoningNot measured74.5%Only MiniMax M3 measured
MMMU Pro (Vals AI)83.5%81.2%Grok 4.20
GPQA Diamond (Artificial Analysis run)91.1%92.9%MiniMax M3
Humanity's Last Exam (Artificial Analysis run)34.5%39.0%MiniMax M3
GPQA Diamond (Epoch AI run)Not measured90.9%Only MiniMax M3 measured
ARC-AGI89.5%Not measuredOnly Grok 4.20 measured
ARC-AGI-265.1%Not measuredOnly Grok 4.20 measured
SimpleBenchNot measured45.8%Only MiniMax M3 measured
Chess puzzlesNot measured13.0%Only MiniMax M3 measured
Mystery game puzzlesNot measured8.0%Only MiniMax M3 measured
LMArena Text: hard promptsNot measured1447Only MiniMax M3 measured
LMArena Text: expertNot measured1461Only MiniMax M3 measured
LMArena Text: hard prompts in EnglishNot measured1455Only MiniMax M3 measured
LMArena Vision: diagramsNot measured1266Only MiniMax M3 measured
LMArena Vision: homeworkNot measured1268Only MiniMax M3 measured
Kagi LLM Benchmark75.0%Not measuredOnly Grok 4.20 measured
Neither model has a result on the other 5 boards here
MathDirectional onlyPublic boards, shown as published, kept out of the index5 boards, none shared
Math benchmarks for Grok 4.20 and MiniMax M3
BenchmarkGrok 4.20MiniMax M3Leader
AIME96.5%Not measuredOnly Grok 4.20 measured
OTIS Mock AIMENot measured71.1%Only MiniMax M3 measured
ProofBenchNot measured18.0%Only MiniMax M3 measured
LMArena Text: mathNot measured1429Only MiniMax M3 measured
LMArena Text: mathematical workNot measured1448Only MiniMax M3 measured
Neither model has a result on the other 8 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index24
Knowledge benchmarks for Grok 4.20 and MiniMax M3
BenchmarkGrok 4.20MiniMax M3Leader
MMLU Pro86.3%84.2%Grok 4.20
LegalBench (Vals AI)77.7%85.4%MiniMax M3
CaseLaw (Vals AI)54.4%Not measuredOnly Grok 4.20 measured
CorpFin (Vals AI)63.7%68.1%MiniMax M3
TaxEval (Vals AI)74.1%72.7%Grok 4.20
MortgageTax (Vals AI)45.4%68.4%MiniMax M3
MedQA (Vals AI)94.5%Not measuredOnly Grok 4.20 measured
MedCode (Vals AI)32.2%46.3%MiniMax M3
LMArena Text: scienceNot measured1452Only MiniMax M3 measured
LMArena Text: medicine and healthcareNot measured1441Only MiniMax M3 measured
LMArena Text: legal and governmentNot measured1437Only MiniMax M3 measured
LMArena Text: business and financeNot measured1434Only MiniMax M3 measured
Neither model has a result on the other 6 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index26
Web design benchmarks for Grok 4.20 and MiniMax M3
BenchmarkGrok 4.20MiniMax M3Leader
Design Arena: websites12291257MiniMax M3
Design Arena: UI components12001242MiniMax M3
Design Arena: game dev11931210MiniMax M3
Design Arena: data viz12171236MiniMax M3
Design Arena: 3D11931208MiniMax M3
Design Arena: all code categories12211247MiniMax M3
Design Arena: SVG11651161Grok 4.20
Design Arena: ASCII art11751161Grok 4.20
LiveBench designNot measured66.2%Only MiniMax M3 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index25
General benchmarks for Grok 4.20 and MiniMax M3
BenchmarkGrok 4.20MiniMax M3Leader
LiveBench data analysisNot measured76.2%Only MiniMax M3 measured
Public Benefits Bench (Vals AI)Not measured64.1%Only MiniMax M3 measured
SAGE (Vals AI)38.2%50.6%MiniMax M3
MedScribe (Vals AI)63.4%87.3%MiniMax M3
Vals Multimodal Index39.1%60.0%MiniMax M3
IFBench81.2%82.9%MiniMax M3
Long context reasoning (AA-LCR)69.0%83.0%MiniMax M3
DTBench90.1%78.9%Grok 4.20
LMCA38.7%33.7%Grok 4.20
CL-bench22.2%Not measuredOnly Grok 4.20 measured
Surface Evolver BenchNot measured55.0%Only MiniMax M3 measured
CL-bench Life11.9%Not measuredOnly Grok 4.20 measured
LMArena TextNot measured1433Only MiniMax M3 measured
LMArena Text: instruction followingNot measured1433Only MiniMax M3 measured
LMArena Text: creative writingNot measured1404Only MiniMax M3 measured
LMArena VisionNot measured1251Only MiniMax M3 measured
LMArena Text: EnglishNot measured1443Only MiniMax M3 measured
LMArena Text: non-EnglishNot measured1420Only MiniMax M3 measured
LMArena Text: ChineseNot measured1466Only MiniMax M3 measured
LMArena Text: GermanNot measured1428Only MiniMax M3 measured
LMArena Text: JapaneseNot measured1380Only MiniMax M3 measured
LMArena Text: KoreanNot measured1373Only MiniMax M3 measured
LMArena Text: FrenchNot measured1444Only MiniMax M3 measured
LMArena Text: SpanishNot measured1433Only MiniMax M3 measured
LMArena Text: RussianNot measured1426Only MiniMax M3 measured
LMArena Text: PolishNot measured1423Only MiniMax M3 measured
LMArena Text: multi-turnNot measured1443Only MiniMax M3 measured
LMArena Text: longer queriesNot measured1446Only MiniMax M3 measured
LMArena Text: writing and languageNot measured1419Only MiniMax M3 measured
LMArena Text: entertainment and mediaNot measured1403Only MiniMax M3 measured
LMArena Vision: EnglishNot measured1263Only MiniMax M3 measured
LMArena Vision: ChineseNot measured1311Only MiniMax M3 measured
LMArena Vision: reading textNot measured1259Only MiniMax M3 measured
LMArena Vision: humorNot measured1235Only MiniMax M3 measured
LMArena Vision: recognizing thingsNot measured1197Only MiniMax M3 measured
LMArena Vision: creative writingNot measured1234Only MiniMax M3 measured
LMArena DocumentNot measured1435Only MiniMax M3 measured
Neither model has a result on the other 9 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Grok 4.20 and MiniMax M3
BenchmarkGrok 4.20MiniMax M3Leader
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

Grok 4.20$0.0025Fits in one request
MiniMax M3$0.0009Fits in one request

MiniMax M3 costs less

Repository review

50K input + 3K output tokens

Grok 4.20$0.070Fits in one request
MiniMax M3$0.019Fits in one request

MiniMax M3 costs less

Agent loop

200K input + 10K output tokens

Grok 4.20$0.275Fits in one request
MiniMax M3$0.072Fits in one request

MiniMax M3 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 Grok 4.20 and MiniMax M3
SpecificationSpaceXAI Grok 4.20MiniMax M3
MakerxAIMiniMax
WeightsNo public weights listedOpen weights
ReleasedMarch 31, 2026May 31, 2026
Context window2M1.05M
Input $/Mtok$1.25$0.30
Output $/Mtok$2.50$1.20
Coding index33.339.2
Independent measurements behind it26
Cost per solved task$0.72$0.56
SourceOpenRouter listingOpenRouter listing

Questions

Is Grok 4.20 better than MiniMax M3 for coding?

Pick MiniMax M3 for coding: it scores 39.2 on the Vibe Coding Index against 33.3 for Grok 4.20. Pick Grok 4.20 for a larger context window (2M against 1.05M tokens) and work measured by LiveCodeBench (Vals AI) or Epoch Capabilities Index, where it leads.

Which is cheaper, Grok 4.20 or MiniMax M3?

Grok 4.20 costs $1.25 per million input tokens and $2.50 per million output tokens; MiniMax M3 costs $0.30 and $1.20. Per solved SWE-bench Verified task, Grok 4.20 costs $0.72 and MiniMax M3 $0.56.

Which has the bigger context window, Grok 4.20 or MiniMax M3?

Grok 4.20, with 2M tokens against 1.05M.

How many benchmarks is the Grok 4.20 vs MiniMax M3 comparison based on?

44 benchmarks have a result for both models as of October 22, 2026. Grok 4.20's coding index rests on 2 independent benchmarks and MiniMax M3's on 6. Where only one model has a result, the page says so instead of naming a winner.

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<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/grok-4-20-vs-minimax-minimax-m3">LLMBenchmark.ai, Grok 4.20 vs MiniMax M3</a></p>