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Claude Haiku 4.5 vs R1 0528

Claude Haiku 4.5 leads R1 0528 on the Artificial Analysis Intelligence Index, 16.9 to 13.1, and R1 0528 costs 2.3x less per output token ($2.18 vs $5.00 per million). Updated October 22, 2026; 43 benchmarks have a result for both.

Replace Claude Haiku 4.5 Replace R1 0528
Claude Haiku 4.5Anthropic
Coding
35.6
Overall
41.0
Output $/M
$5.00
16
R1 0528DeepSeek
Coding
No data
Overall
46.8
Output $/M
$2.18
26
vs boards won of 43 shared, 1 tied

Claude Haiku 4.5 or R1 0528: which to pick

Only Claude Haiku 4.5 has a coding score, 35.6 on the Vibe Coding Index; R1 0528 has none, so the two cannot be ranked on coding.

Pick R1 0528 for output tokens 2.3x cheaper ($2.18 vs $5.00 per million) and work measured by GPQA Diamond (Epoch AI run) or MATH level 5, where it leads.

Model AClaude Haiku 4.5Anthropic35.6/1004 independent benchmarks$0.56 per solved taskModel BR1 0528DeepSeekNot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
43
Claude Haiku 4.5 only
52
R1 0528 only
17
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
Claude Haiku 4.5 35.6 from 4 benchmarks, R1 0528 not benchmarked.
Widest category
Agentic work, 10.4 points apart on average over 1 shared benchmark.
Widest single gap
ARC-AGI: Claude Haiku 4.5 47.7% against R1 0528 21.2%, 26.5 points apart on a 0 to 100 scale.
Output price
Claude Haiku 4.5 $5.00 against R1 0528 $2.18 per million output tokens, 2.3x apart.
Context window
Claude Haiku 4.5 takes 200K tokens, R1 0528 164K.

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 4.5BarsR1 0528Ties
Coding30
Intelligence10
Agentic work10
Reasoning51
Math22
Knowledge04
Web design061 tie
General413
All shared boards16261 tie
CodingLike-for-likeSix of these boards feed the Vibe Coding Index30
Coding benchmarks for Claude Haiku 4.5 and R1 0528
BenchmarkClaude Haiku 4.5R1 0528Leader
Aider polyglotNot measured71.4%Only R1 0528 measured
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%Not measuredOnly Claude Haiku 4.5 measured
LMArena WebDev1330Not measuredOnly Claude Haiku 4.5 measured
AA Coding Index43.9Not measuredOnly Claude Haiku 4.5 measured
LiveCodeBench (Vals AI)41.2%Not measuredOnly Claude Haiku 4.5 measured
SWE-bench Verified (Vals AI)66.6%Not measuredOnly Claude Haiku 4.5 measured
Vibe Code Bench (Vals AI)11.4%Not measuredOnly Claude Haiku 4.5 measured
Code migration (Vals AI)7.5%Not measuredOnly Claude Haiku 4.5 measured
ProgramBench (Vals AI)0.0%Not measuredOnly Claude Haiku 4.5 measured
Terminal-Bench 2.1 (Vals AI)43.8%Not measuredOnly Claude Haiku 4.5 measured
LiveCodeBench (Artificial Analysis run)Not measured77.0%Only R1 0528 measured
Terminal-Bench Hard (Artificial Analysis run)Not measured15.9%Only R1 0528 measured
Terminal-Bench35.5%Not measuredOnly Claude Haiku 4.5 measured
WeirdML45.4%41.6%Claude Haiku 4.5
ALE-BenchNot measured804.1Only R1 0528 measured
LMArena Text: coding14541427Claude Haiku 4.5
LMArena Text: software and IT14391435Claude Haiku 4.5
LMArena WebDev: React1326Not measuredOnly Claude Haiku 4.5 measured
LMArena WebDev: HTML1318Not measuredOnly Claude Haiku 4.5 measured
Neither model has a result on the other 18 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
Intelligence benchmarks for Claude Haiku 4.5 and R1 0528
BenchmarkClaude Haiku 4.5R1 0528Leader
AA Intelligence Index16.913.1Claude Haiku 4.5
Epoch Capabilities Index142.2Not measuredOnly Claude Haiku 4.5 measured
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
Agentic work benchmarks for Claude Haiku 4.5 and R1 0528
BenchmarkClaude Haiku 4.5R1 0528Leader
AA Agentic Index8.0Not measuredOnly Claude Haiku 4.5 measured
LiveBench research42.2%Not measuredOnly Claude Haiku 4.5 measured
LiveBench browser40.0%Not measuredOnly Claude Haiku 4.5 measured
LiveBench long agentic11.1%Not measuredOnly Claude Haiku 4.5 measured
Finance Agent (Vals AI)31.0%Not measuredOnly Claude Haiku 4.5 measured
Tax Agent Bench (Vals AI)5.9%Not measuredOnly Claude Haiku 4.5 measured
Legal Research Bench (Vals AI)10.6%Not measuredOnly Claude Haiku 4.5 measured
Excel Modeling Benchmark (Vals AI)22.7%Not measuredOnly Claude Haiku 4.5 measured
τ²-Bench TelecomNot measured36.5%Only R1 0528 measured
METR time horizonsNot measured53.8%Only R1 0528 measured
BALROG31.2%Not measuredOnly Claude Haiku 4.5 measured
DeepResearch Bench45.5%35.1%Claude Haiku 4.5
Vending-Bench 2$459Not measuredOnly Claude Haiku 4.5 measured
Berkeley Function Calling Leaderboard (BFCL)68.7%Not measuredOnly Claude Haiku 4.5 measured
BrowseComp-PlusNot measured16.4%Only R1 0528 measured
Neither model has a result on the other 26 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index51
Reasoning benchmarks for Claude Haiku 4.5 and R1 0528
BenchmarkClaude Haiku 4.5R1 0528Leader
GPQA Diamond72.2%Not measuredOnly Claude Haiku 4.5 measured
LiveBench reasoning61.7%Not measuredOnly Claude Haiku 4.5 measured
MMMU Pro (Vals AI)46.1%Not measuredOnly Claude Haiku 4.5 measured
GPQA Diamond (Artificial Analysis run)Not measured81.3%Only R1 0528 measured
Humanity's Last Exam (Artificial Analysis run)Not measured15.8%Only R1 0528 measured
GPQA Diamond (Epoch AI run)71.2%76.3%R1 0528
ARC-AGI47.7%21.2%Claude Haiku 4.5
ARC-AGI-24.0%1.1%Claude Haiku 4.5
SimpleBenchNot measured40.8%Only R1 0528 measured
Chess puzzles8.0%Not measuredOnly Claude Haiku 4.5 measured
LMArena Text: hard prompts14211415Claude Haiku 4.5
LMArena Text: expert14431394Claude Haiku 4.5
LMArena Text: hard prompts in English14351422Claude Haiku 4.5
Neither model has a result on the other 9 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index22
Math benchmarks for Claude Haiku 4.5 and R1 0528
BenchmarkClaude Haiku 4.5R1 0528Leader
AIME82.7%Not measuredOnly Claude Haiku 4.5 measured
MGSM (Vals AI)92.2%Not measuredOnly Claude Haiku 4.5 measured
AA Math IndexNot measured76.0Only R1 0528 measured
AIME 2025 (Artificial Analysis run)Not measured76.0%Only R1 0528 measured
OTIS Mock AIME66.7%66.4%Claude Haiku 4.5
MATH level 596.4%96.6%R1 0528
LMArena Text: math13981400R1 0528
LMArena Text: mathematical work14301415Claude Haiku 4.5
Neither model has a result on the other 5 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index04
Knowledge benchmarks for Claude Haiku 4.5 and R1 0528
BenchmarkClaude Haiku 4.5R1 0528Leader
MMLU Pro78.7%Not measuredOnly Claude Haiku 4.5 measured
LegalBench (Vals AI)81.2%Not measuredOnly Claude Haiku 4.5 measured
CaseLaw (Vals AI)56.5%Not measuredOnly Claude Haiku 4.5 measured
CorpFin (Vals AI)60.6%Not measuredOnly Claude Haiku 4.5 measured
TaxEval (Vals AI)67.5%Not measuredOnly Claude Haiku 4.5 measured
MortgageTax (Vals AI)62.2%Not measuredOnly Claude Haiku 4.5 measured
MedQA (Vals AI)79.6%Not measuredOnly Claude Haiku 4.5 measured
MedCode (Vals AI)32.7%Not measuredOnly Claude Haiku 4.5 measured
MMLU Pro (Artificial Analysis run)Not measured84.9%Only R1 0528 measured
SimpleQA Verified13.2%Not measuredOnly Claude Haiku 4.5 measured
LMArena Text: science14061430R1 0528
LMArena Text: medicine and healthcare13941445R1 0528
LMArena Text: legal and government14001419R1 0528
LMArena Text: business and finance14001402R1 0528
Neither model has a result on the other 4 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index06
Web design benchmarks for Claude Haiku 4.5 and R1 0528
BenchmarkClaude Haiku 4.5R1 0528Leader
Design Arena: websites11221149R1 0528
Design Arena: UI components10971100R1 0528
Design Arena: game dev10971097Tie
Design Arena: data viz11241182R1 0528
Design Arena: 3D10711110R1 0528
Design Arena: all code categories11141138R1 0528
Design Arena: SVG10251038R1 0528
Design Arena: ASCII art1140Not measuredOnly Claude Haiku 4.5 measured
LiveBench design59.9%Not measuredOnly Claude Haiku 4.5 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index413
General benchmarks for Claude Haiku 4.5 and R1 0528
BenchmarkClaude Haiku 4.5R1 0528Leader
LiveBench data analysis59.3%Not measuredOnly Claude Haiku 4.5 measured
Public Benefits Bench (Vals AI)54.3%Not measuredOnly Claude Haiku 4.5 measured
SAGE (Vals AI)31.8%Not measuredOnly Claude Haiku 4.5 measured
MedScribe (Vals AI)85.2%Not measuredOnly Claude Haiku 4.5 measured
Vals Multimodal Index42.9%Not measuredOnly Claude Haiku 4.5 measured
IFBenchNot measured39.6%Only R1 0528 measured
Long context reasoning (AA-LCR)Not measured55.7%Only R1 0528 measured
DTBench73.6%Not measuredOnly Claude Haiku 4.5 measured
LMCA30.9%Not measuredOnly Claude Haiku 4.5 measured
Fiction.LiveBenchNot measured75.0%Only R1 0528 measured
Creative writing (Lech Mazur)Not measured81.9%Only R1 0528 measured
ExploitBench13.7%Not measuredOnly Claude Haiku 4.5 measured
LMArena Text13971428R1 0528
LMArena Text: instruction following14141382Claude Haiku 4.5
LMArena Text: creative writing13711405R1 0528
LMArena Text: English14141437R1 0528
LMArena Text: non-English13771412R1 0528
LMArena Text: Chinese14181442R1 0528
LMArena Text: German13741404R1 0528
LMArena Text: Japanese13381391R1 0528
LMArena Text: Korean13461360R1 0528
LMArena Text: French14111417R1 0528
LMArena Text: Spanish14211411Claude Haiku 4.5
LMArena Text: Russian13811423R1 0528
LMArena Text: Polish13431428R1 0528
LMArena Text: multi-turn14091405Claude Haiku 4.5
LMArena Text: longer queries14271391Claude Haiku 4.5
LMArena Text: writing and language13861402R1 0528
LMArena Text: entertainment and media13691400R1 0528
LMArena Document1420Not measuredOnly Claude Haiku 4.5 measured
Neither model has a result on the other 16 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 R1 0528
BenchmarkClaude Haiku 4.5R1 0528Leader
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
R1 0528$0.0016Fits in one request

R1 0528 costs less

Repository review

50K input + 3K output tokens

Claude Haiku 4.5$0.065Fits in one request
R1 0528$0.032Fits in one request

R1 0528 costs less

Agent loop

200K input + 10K output tokens

Claude Haiku 4.5$0.250Exceeds the context window
R1 0528$0.122Exceeds the context window

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 Claude Haiku 4.5 and R1 0528
SpecificationAnthropic Claude Haiku 4.5DeepSeek R1 0528
MakerAnthropicDeepSeek
WeightsNo public weights listedOpen weights
ReleasedOctober 15, 2025May 28, 2025
Context window200K164K
Input $/Mtok$1.00$0.50
Output $/Mtok$5.00$2.18
Coding index35.6Not benchmarked
Independent measurements behind it40
Cost per solved task$0.56Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Haiku 4.5 better than R1 0528 for coding?

Only Claude Haiku 4.5 has a coding score, 35.6 on the Vibe Coding Index; R1 0528 has none, so the two cannot be ranked on coding. Pick R1 0528 for output tokens 2.3x cheaper ($2.18 vs $5.00 per million) and work measured by GPQA Diamond (Epoch AI run) or MATH level 5, where it leads.

Which is cheaper, Claude Haiku 4.5 or R1 0528?

Claude Haiku 4.5 costs $1.00 per million input tokens and $5.00 per million output tokens; R1 0528 costs $0.50 and $2.18. Cost per solved task is known for Claude Haiku 4.5 only.

Which has the bigger context window, Claude Haiku 4.5 or R1 0528?

Claude Haiku 4.5, with 200K tokens against 164K.

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

43 benchmarks have a result for both models as of October 22, 2026. Claude Haiku 4.5's coding index rests on 4 independent benchmarks and R1 0528's on 0. Where only one model has a result, the page says so instead of naming a winner.

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