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Claude Haiku 4.5 vs Grok 4.5

Updated October 21, 2026. 82 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.

Replace Claude Haiku 4.5 Replace Grok 4.5
Claude Haiku 4.5Anthropic
Coding
49.8
Overall
16.9
Output $/M
$5.00
1
Grok 4.5xAI
Coding
75.5
Overall
38.8
Output $/M
$6.00
80
vs boards won of 82 shared, 1 tied

Decision reading

Pick Grok 4.5 for coding: it scores 75.5 on the Vibe Coding Index against 49.8 for Claude Haiku 4.5, though on 2 benchmarks against 3.

Pick Claude Haiku 4.5 when output tokens cost 1.2x less, or when a solved task costs $0.56 against $0.62.

Model AClaude Haiku 4.5Anthropic49.8/1003 independent benchmarks$0.56 per solved taskModel BGrok 4.5xAI75.5/1002 independent benchmarks$0.62 per solved task
Shared results
82
Claude Haiku 4.5 only
12
Grok 4.5 only
38
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
Claude Haiku 4.5 49.8 from 3 benchmarks, Grok 4.5 75.5 from 2 benchmarks.
Widest category
Coding, 26.6 points apart on average over 14 shared benchmarks.
Widest single gap
Vibe Code Bench (Vals AI): Claude Haiku 4.5 11.4% against Grok 4.5 69.0%, 57.6 points apart on a 0 to 100 scale.
Output price
Claude Haiku 4.5 $5.00 against Grok 4.5 $6.00 per million output tokens, 1.2x apart.
Context window
Claude Haiku 4.5 takes 200K 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
CategoryClaude Haiku 4.5BarsGrok 4.5Ties
Coding0131 tie
Intelligence02
Agentic work09
Reasoning010
Math03
Knowledge110
Web design09
General024
All shared boards1801 tie
CodingLike-for-likeFour of these boards feed the Vibe Coding Index013
Coding benchmarks for Claude Haiku 4.5 and Grok 4.5
BenchmarkClaude Haiku 4.5Grok 4.5Leader
SWE-bench Verified66.6%Not measuredOnly Claude Haiku 4.5 measured
SWE-bench Multilingual64.7%Not measuredOnly Claude Haiku 4.5 measured
LiveBench coding48.1%94.3%Grok 4.5
LMArena WebDev13301553Grok 4.5
AA Coding Index43.972.4Grok 4.5
LiveCodeBench (Vals AI)41.2%87.3%Grok 4.5
SWE-bench Verified (Vals AI)66.6%86.6%Grok 4.5
Terminal-Bench 4 (Vals AI)Not measured8.6%Only Grok 4.5 measured
Vibe Code Bench (Vals AI)11.4%69.0%Grok 4.5
Code migration (Vals AI)7.5%36.6%Grok 4.5
ProgramBench (Vals AI)0.0%0.0%Tie
IOI (Vals AI)Not measured40.6%Only Grok 4.5 measured
Terminal-Bench 2.1 (Vals AI)43.8%67.8%Grok 4.5
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
Terminal-Bench35.5%Not measuredOnly Claude Haiku 4.5 measured
FrontierCodeNot measured42.4%Only Grok 4.5 measured
WeirdML45.4%46.4%Grok 4.5
ALE-BenchNot measured1309.3Only Grok 4.5 measured
LMArena Text: coding14541474Grok 4.5
LMArena Text: software and IT14391471Grok 4.5
LMArena WebDev: React13261556Grok 4.5
LMArena WebDev: HTML13181567Grok 4.5
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 index02
Intelligence benchmarks for Claude Haiku 4.5 and Grok 4.5
BenchmarkClaude Haiku 4.5Grok 4.5Leader
AA Intelligence Index16.938.8Grok 4.5
Epoch Capabilities Index142.2154.1Grok 4.5
Agentic workLike-for-likePublic boards, shown as published, kept out of the index09
Agentic work benchmarks for Claude Haiku 4.5 and Grok 4.5
BenchmarkClaude Haiku 4.5Grok 4.5Leader
AA Agentic Index8.041.2Grok 4.5
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 research42.2%85.9%Grok 4.5
LiveBench browser40.0%44.0%Grok 4.5
LiveBench long agentic11.1%27.9%Grok 4.5
SREBench (Vals AI)Not measured0.8%Only Grok 4.5 measured
Finance Agent (Vals AI)31.0%48.4%Grok 4.5
Tax Agent Bench (Vals AI)5.9%24.9%Grok 4.5
Legal Research Bench (Vals AI)10.6%38.0%Grok 4.5
Excel Modeling Benchmark (Vals AI)22.7%52.9%Grok 4.5
Time Horizon Index (Vals AI)Not measured6.3%Only Grok 4.5 measured
APEX-AgentsNot measured56.2%Only Grok 4.5 measured
BALROG31.2%Not measuredOnly Claude Haiku 4.5 measured
DeepResearch Bench45.5%Not measuredOnly Claude Haiku 4.5 measured
PostTrainBenchNot measured23.4%Only Grok 4.5 measured
Vending-Bench 2$459$3,887Grok 4.5
LMArena SearchNot measured1216Only Grok 4.5 measured
Neither model has a result on the other 15 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index010
Reasoning benchmarks for Claude Haiku 4.5 and Grok 4.5
BenchmarkClaude Haiku 4.5Grok 4.5Leader
GPQA Diamond72.2%92.9%Grok 4.5
LiveBench reasoning61.7%87.2%Grok 4.5
MMMU Pro (Vals AI)46.1%61.8%Grok 4.5
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)71.2%93.4%Grok 4.5
ARC-AGI47.7%87.2%Grok 4.5
ARC-AGI-24.0%52.6%Grok 4.5
SimpleBenchNot measured70.0%Only Grok 4.5 measured
Chess puzzles8.0%35.0%Grok 4.5
LMArena Text: hard prompts14211462Grok 4.5
LMArena Text: expert14431465Grok 4.5
LMArena Text: hard prompts in English14351464Grok 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 Claude Haiku 4.5 and Grok 4.5
BenchmarkClaude Haiku 4.5Grok 4.5Leader
AIME82.7%Not measuredOnly Claude Haiku 4.5 measured
MGSM (Vals AI)92.2%Not measuredOnly Claude Haiku 4.5 measured
OTIS Mock AIME66.7%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 596.4%Not measuredOnly Claude Haiku 4.5 measured
LMArena Text: math13981460Grok 4.5
LMArena Text: mathematical work14301482Grok 4.5
Neither model has a result on the other 4 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index110
Knowledge benchmarks for Claude Haiku 4.5 and Grok 4.5
BenchmarkClaude Haiku 4.5Grok 4.5Leader
MMLU Pro78.7%89.2%Grok 4.5
LegalBench (Vals AI)81.2%86.0%Grok 4.5
CaseLaw (Vals AI)56.5%Not measuredOnly Claude Haiku 4.5 measured
CorpFin (Vals AI)60.6%67.4%Grok 4.5
TaxEval (Vals AI)67.5%71.7%Grok 4.5
MortgageTax (Vals AI)62.2%61.8%Claude Haiku 4.5
MedQA (Vals AI)79.6%Not measuredOnly Claude Haiku 4.5 measured
MedCode (Vals AI)32.7%43.3%Grok 4.5
SimpleQA Verified13.2%48.3%Grok 4.5
LMArena Text: science14061464Grok 4.5
LMArena Text: medicine and healthcare13941440Grok 4.5
LMArena Text: legal and government14001463Grok 4.5
LMArena Text: business and finance14001441Grok 4.5
Neither model has a result on the other 4 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index09
Web design benchmarks for Claude Haiku 4.5 and Grok 4.5
BenchmarkClaude Haiku 4.5Grok 4.5Leader
Design Arena: websites11221281Grok 4.5
Design Arena: UI components11001279Grok 4.5
Design Arena: game dev10971263Grok 4.5
Design Arena: data viz11241267Grok 4.5
Design Arena: 3D10721257Grok 4.5
Design Arena: all code categories11151276Grok 4.5
Design Arena: SVG10251215Grok 4.5
Design Arena: ASCII art11391257Grok 4.5
LiveBench design59.9%78.1%Grok 4.5
GeneralLike-for-likePublic boards, shown as published, kept out of the index024
General benchmarks for Claude Haiku 4.5 and Grok 4.5
BenchmarkClaude Haiku 4.5Grok 4.5Leader
LiveBench data analysis59.3%73.0%Grok 4.5
Public Benefits Bench (Vals AI)54.3%Not measuredOnly Claude Haiku 4.5 measured
SAGE (Vals AI)31.8%35.0%Grok 4.5
MedScribe (Vals AI)85.2%86.9%Grok 4.5
Vals Multimodal Index42.9%63.4%Grok 4.5
Long context reasoning (AA-LCR)Not measured79.3%Only Grok 4.5 measured
DTBench73.6%96.5%Grok 4.5
LMCA30.9%45.2%Grok 4.5
Surface Evolver BenchNot measured74.4%Only Grok 4.5 measured
Furniture assemblyNot measured22.5%Only Grok 4.5 measured
ExploitBench13.7%Not measuredOnly Claude Haiku 4.5 measured
LMArena Text13971448Grok 4.5
LMArena Text: instruction following14141445Grok 4.5
LMArena Text: creative writing13711442Grok 4.5
LMArena VisionNot measured1287Only Grok 4.5 measured
LMArena Text: English14141453Grok 4.5
LMArena Text: non-English13771440Grok 4.5
LMArena Text: Chinese14181495Grok 4.5
LMArena Text: German13741448Grok 4.5
LMArena Text: Japanese13381430Grok 4.5
LMArena Text: Korean13461406Grok 4.5
LMArena Text: French14111457Grok 4.5
LMArena Text: Spanish14211451Grok 4.5
LMArena Text: Russian13811449Grok 4.5
LMArena Text: Polish13431432Grok 4.5
LMArena Text: multi-turn14091456Grok 4.5
LMArena Text: longer queries14271462Grok 4.5
LMArena Text: writing and language13861445Grok 4.5
LMArena Text: entertainment and media13691434Grok 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 Document14201452Grok 4.5
Neither model has a result on the other 11 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Claude Haiku 4.5 and Grok 4.5
BenchmarkClaude Haiku 4.5Grok 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

Claude Haiku 4.5$0.0035Fits in one request
Grok 4.5$0.0050Fits in one request

Claude Haiku 4.5 costs less

Repository review

50K input + 3K output tokens

Claude Haiku 4.5$0.065Fits in one request
Grok 4.5$0.118Fits in one request

Claude Haiku 4.5 costs less

Agent loop

200K input + 10K output tokens

Claude Haiku 4.5$0.250Exceeds the context window
Grok 4.5$0.460Fits in one request

Claude Haiku 4.5 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 Claude Haiku 4.5 and Grok 4.5
SpecificationAnthropic Claude Haiku 4.5SpaceXAI Grok 4.5
MakerAnthropicxAI
WeightsNo public weights listedNo public weights listed
ReleasedOctober 15, 2025July 8, 2026
Context window200K500K
Input $/Mtok$1.00$2.00
Output $/Mtok$5.00$6.00
Coding index49.875.5
Independent measurements behind it32
Cost per solved task$0.56$0.62
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Haiku 4.5 better than Grok 4.5 for coding?

Pick Grok 4.5 for coding: it scores 75.5 on the Vibe Coding Index against 49.8 for Claude Haiku 4.5, though on 2 benchmarks against 3. Pick Claude Haiku 4.5 when output tokens cost 1.2x less, or when a solved task costs $0.56 against $0.62.

Which is cheaper, Claude Haiku 4.5 or Grok 4.5?

Claude Haiku 4.5 costs $1.00 per million input tokens and $5.00 per million output tokens; Grok 4.5 costs $2.00 and $6.00. Per solved SWE-bench Verified task, Claude Haiku 4.5 costs $0.56 and Grok 4.5 $0.62.

Which has the bigger context window, Claude Haiku 4.5 or Grok 4.5?

Grok 4.5, with 500K tokens against 200K.

How many benchmarks is the Claude Haiku 4.5 vs Grok 4.5 comparison based on?

82 benchmarks have a result for both models as of October 21, 2026. Claude Haiku 4.5's coding index rests on 3 independent benchmarks 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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