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R1 0528 vs Grok 4.5

Updated October 21, 2026. 46 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace R1 0528 Replace Grok 4.5
R1 0528DeepSeek
Coding
71.4
Overall
13.1
Output $/M
$2.15
1
Grok 4.5xAI
Coding
75.5
Overall
38.8
Output $/M
$6.00
45
vs boards won of 46 shared

Decision reading

Pick Grok 4.5 for coding: it scores 75.5 on the Vibe Coding Index against 71.4 for R1 0528.

Pick R1 0528 when output tokens cost 2.8x less, or when the benchmark that matters is LMArena Text: medicine and healthcare, where it leads.

Model AR1 0528DeepSeek71.4/1001 independent benchmarkNo cost per solved taskModel BGrok 4.5xAI75.5/1002 independent benchmarks$0.62 per solved task
Shared results
46
R1 0528 only
13
Grok 4.5 only
74
Like-for-like categories
7 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
R1 0528 71.4 from 1 benchmark, Grok 4.5 75.5 from 2 benchmarks.
Widest category
Intelligence, 25.7 points apart on average over 1 shared benchmark.
Widest single gap
ARC-AGI: R1 0528 21.2% against Grok 4.5 87.2%, 66.0 points apart on a 0 to 100 scale.
Output price
R1 0528 $2.15 against Grok 4.5 $6.00 per million output tokens, 2.8x apart.
Context window
R1 0528 takes 164K 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
CategoryR1 0528BarsGrok 4.5Ties
Coding04
Intelligence01
Reasoning09
Math03
Knowledge13
Web design07
General018
All shared boards145
CodingLike-for-likeFour of these boards feed the Vibe Coding Index04
Coding benchmarks for R1 0528 and Grok 4.5
BenchmarkR1 0528Grok 4.5Leader
Aider polyglot71.4%Not measuredOnly R1 0528 measured
LiveBench codingNot measured94.3%Only Grok 4.5 measured
LMArena WebDevNot measured1553Only Grok 4.5 measured
AA Coding IndexNot measured72.4Only Grok 4.5 measured
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
LiveCodeBench (Artificial Analysis run)77.0%Not measuredOnly R1 0528 measured
SciCodeNot measured55.0%Only Grok 4.5 measured
Terminal-Bench Hard (Artificial Analysis run)15.9%Not measuredOnly R1 0528 measured
FrontierCodeNot measured42.4%Only Grok 4.5 measured
WeirdML41.6%46.4%Grok 4.5
ALE-Bench804.11309.3Grok 4.5
LMArena Text: coding14271474Grok 4.5
LMArena Text: software and IT14351471Grok 4.5
LMArena WebDev: ReactNot measured1556Only Grok 4.5 measured
LMArena WebDev: HTMLNot measured1567Only Grok 4.5 measured
LMArena WebDev: from an imageNot measured1562Only Grok 4.5 measured
Neither model has a result on the other 13 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
Intelligence benchmarks for R1 0528 and Grok 4.5
BenchmarkR1 0528Grok 4.5Leader
AA Intelligence Index13.138.8Grok 4.5
Epoch Capabilities IndexNot measured154.1Only Grok 4.5 measured
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index25 boards, none shared
Agentic work benchmarks for R1 0528 and Grok 4.5
BenchmarkR1 0528Grok 4.5Leader
AA Agentic IndexNot measured41.2Only Grok 4.5 measured
Design Arena: agents building web appsNot measured1217Only Grok 4.5 measured
Design Arena: agents building full-stack appsNot measured1249Only Grok 4.5 measured
Design Arena: agents building mobile appsNot measured1221Only Grok 4.5 measured
Design Arena: agents building Android appsNot measured1242Only Grok 4.5 measured
Design Arena: agents building Godot gamesNot measured1229Only Grok 4.5 measured
Design Arena: agents building gamesNot measured1235Only Grok 4.5 measured
Design Arena: HTML slidesNot measured1204Only Grok 4.5 measured
Design Arena: PowerPoint slidesNot measured1232Only 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
τ²-Bench Telecom36.5%Not measuredOnly R1 0528 measured
APEX-AgentsNot measured56.2%Only Grok 4.5 measured
METR time horizons53.8%Not measuredOnly R1 0528 measured
DeepResearch Bench35.1%Not measuredOnly R1 0528 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 14 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index09
Reasoning benchmarks for R1 0528 and Grok 4.5
BenchmarkR1 0528Grok 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)81.3%93.1%Grok 4.5
Humanity's Last Exam (Artificial Analysis run)15.8%42.7%Grok 4.5
GPQA Diamond (Epoch AI run)76.3%93.4%Grok 4.5
ARC-AGI21.2%87.2%Grok 4.5
ARC-AGI-21.1%52.6%Grok 4.5
SimpleBench40.8%70.0%Grok 4.5
Chess puzzlesNot measured35.0%Only Grok 4.5 measured
LMArena Text: hard prompts14151462Grok 4.5
LMArena Text: expert13941465Grok 4.5
LMArena Text: hard prompts in English14221464Grok 4.5
LMArena Vision: diagramsNot measured1304Only Grok 4.5 measured
LMArena Vision: homeworkNot measured1295Only Grok 4.5 measured
Neither model has a result on the other 6 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index03
Math benchmarks for R1 0528 and Grok 4.5
BenchmarkR1 0528Grok 4.5Leader
AA Math Index76.0Not measuredOnly R1 0528 measured
AIME 2025 (Artificial Analysis run)76.0%Not measuredOnly R1 0528 measured
OTIS Mock AIME66.4%97.8%Grok 4.5
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
MATH level 596.6%Not measuredOnly R1 0528 measured
LMArena Text: math14001460Grok 4.5
LMArena Text: mathematical work14151482Grok 4.5
Neither model has a result on the other 4 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index13
Knowledge benchmarks for R1 0528 and Grok 4.5
BenchmarkR1 0528Grok 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
MMLU Pro (Artificial Analysis run)84.9%Not measuredOnly R1 0528 measured
SimpleQA VerifiedNot measured48.3%Only Grok 4.5 measured
LMArena Text: science14301464Grok 4.5
LMArena Text: medicine and healthcare14451440R1 0528
LMArena Text: legal and government14191463Grok 4.5
LMArena Text: business and finance14021441Grok 4.5
Neither model has a result on the other 5 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index07
Web design benchmarks for R1 0528 and Grok 4.5
BenchmarkR1 0528Grok 4.5Leader
Design Arena: websites11491281Grok 4.5
Design Arena: UI components11021279Grok 4.5
Design Arena: game dev10981263Grok 4.5
Design Arena: data viz11821267Grok 4.5
Design Arena: 3D11111257Grok 4.5
Design Arena: all code categories11391276Grok 4.5
Design Arena: SVG10381215Grok 4.5
Design Arena: ASCII artNot measured1257Only Grok 4.5 measured
LiveBench designNot measured78.1%Only Grok 4.5 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index018
General benchmarks for R1 0528 and Grok 4.5
BenchmarkR1 0528Grok 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
IFBench39.6%Not measuredOnly R1 0528 measured
Long context reasoning (AA-LCR)55.7%79.3%Grok 4.5
DTBenchNot measured96.5%Only Grok 4.5 measured
LMCANot measured45.2%Only Grok 4.5 measured
Fiction.LiveBench75.0%Not measuredOnly R1 0528 measured
Creative writing (Lech Mazur)81.9%Not measuredOnly R1 0528 measured
Surface Evolver BenchNot measured74.4%Only Grok 4.5 measured
Furniture assemblyNot measured22.5%Only Grok 4.5 measured
LMArena Text14281448Grok 4.5
LMArena Text: instruction following13821445Grok 4.5
LMArena Text: creative writing14051442Grok 4.5
LMArena VisionNot measured1287Only Grok 4.5 measured
LMArena Text: English14371453Grok 4.5
LMArena Text: non-English14121440Grok 4.5
LMArena Text: Chinese14421495Grok 4.5
LMArena Text: German14041448Grok 4.5
LMArena Text: Japanese13911430Grok 4.5
LMArena Text: Korean13601406Grok 4.5
LMArena Text: French14171457Grok 4.5
LMArena Text: Spanish14111451Grok 4.5
LMArena Text: Russian14231449Grok 4.5
LMArena Text: Polish14281432Grok 4.5
LMArena Text: multi-turn14051456Grok 4.5
LMArena Text: longer queries13911462Grok 4.5
LMArena Text: writing and language14021445Grok 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 10 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for R1 0528 and Grok 4.5
BenchmarkR1 0528Grok 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

R1 0528$0.0016Fits in one request
Grok 4.5$0.0050Fits in one request

R1 0528 costs less

Repository review

50K input + 3K output tokens

R1 0528$0.031Fits in one request
Grok 4.5$0.118Fits in one request

R1 0528 costs less

Agent loop

200K input + 10K output tokens

R1 0528$0.121Exceeds the context window
Grok 4.5$0.460Fits in one request

R1 0528 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 R1 0528 and Grok 4.5
SpecificationDeepSeek R1 0528SpaceXAI Grok 4.5
MakerDeepSeekxAI
WeightsOpen weightsNo public weights listed
ReleasedMay 28, 2025July 8, 2026
Context window164K500K
Input $/Mtok$0.50$2.00
Output $/Mtok$2.15$6.00
Coding index71.475.5
Independent measurements behind it12
Cost per solved taskNot computable$0.62
SourceOpenRouter listingOpenRouter listing

Questions

Is R1 0528 better than Grok 4.5 for coding?

Pick Grok 4.5 for coding: it scores 75.5 on the Vibe Coding Index against 71.4 for R1 0528. Pick R1 0528 when output tokens cost 2.8x less, or when the benchmark that matters is LMArena Text: medicine and healthcare, where it leads.

Which is cheaper, R1 0528 or Grok 4.5?

R1 0528 costs $0.50 per million input tokens and $2.15 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, R1 0528 or Grok 4.5?

Grok 4.5, with 500K tokens against 164K.

How many benchmarks is the R1 0528 vs Grok 4.5 comparison based on?

46 benchmarks have a result for both models as of October 21, 2026. R1 0528's coding index rests on 1 independent benchmark and Grok 4.5's on 2. Where only one model has a result, the page says so instead of naming a winner.

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