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Claude Haiku 4.5 vs GPT-4.1 Nano

Claude Haiku 4.5 leads GPT-4.1 Nano on the Artificial Analysis Intelligence Index, 16.9 to 7.8, and GPT-4.1 Nano costs 12.5x less per output token ($0.40 vs $5.00 per million). Updated October 22, 2026; 55 benchmarks have a result for both.

Replace Claude Haiku 4.5 Replace GPT-4.1 Nano
Claude Haiku 4.5Anthropic
Coding
35.6
Overall
41.0
Output $/M
$5.00
53
GPT-4.1 NanoOpenAI
Coding
No data
Overall
24.7
Output $/M
$0.40
2
vs boards won of 55 shared

Claude Haiku 4.5 or GPT-4.1 Nano: which to pick

Only Claude Haiku 4.5 has a coding score, 35.6 on the Vibe Coding Index; GPT-4.1 Nano has none, so the two cannot be ranked on coding.

Pick GPT-4.1 Nano for output tokens 12.5x cheaper ($0.40 vs $5.00 per million) and a larger context window (1.05M against 200K tokens).

Model AClaude Haiku 4.5Anthropic35.6/1004 independent benchmarks$0.56 per solved taskModel BGPT-4.1 NanoOpenAINot benchmarkedNo coding benchmarkNo cost per solved task
Shared results
55
Claude Haiku 4.5 only
43
GPT-4.1 Nano only
16
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, GPT-4.1 Nano not benchmarked.
Widest category
Agentic work, 35.6 points apart on average over 1 shared benchmark.
Widest single gap
AIME: Claude Haiku 4.5 82.7% against GPT-4.1 Nano 26.5%, 56.2 points apart on a 0 to 100 scale.
Output price
Claude Haiku 4.5 $5.00 against GPT-4.1 Nano $0.40 per million output tokens, 12.5x apart.
Context window
Claude Haiku 4.5 takes 200K tokens, GPT-4.1 Nano 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
CategoryClaude Haiku 4.5BarsGPT-4.1 NanoTies
Coding41
Intelligence20
Agentic work10
Reasoning81
Math60
Knowledge110
Web design60
General150
All shared boards532
CodingLike-for-likeSix of these boards feed the Vibe Coding Index41
Coding benchmarks for Claude Haiku 4.5 and GPT-4.1 Nano
BenchmarkClaude Haiku 4.5GPT-4.1 NanoLeader
Aider polyglotNot measured8.9%Only GPT-4.1 Nano 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 Index43.911.1Claude Haiku 4.5
LiveCodeBench (Vals AI)41.2%42.7%GPT-4.1 Nano
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 measured32.6%Only GPT-4.1 Nano measured
Terminal-Bench Hard (Artificial Analysis run)Not measured3.8%Only GPT-4.1 Nano measured
Terminal-Bench35.5%Not measuredOnly Claude Haiku 4.5 measured
WeirdML45.4%19.0%Claude Haiku 4.5
LMArena Text: coding14541306Claude Haiku 4.5
LMArena Text: software and IT14391305Claude 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 23 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for Claude Haiku 4.5 and GPT-4.1 Nano
BenchmarkClaude Haiku 4.5GPT-4.1 NanoLeader
AA Intelligence Index16.97.8Claude Haiku 4.5
Epoch Capabilities Index142.2129.5Claude Haiku 4.5
Agentic workLike-for-likePublic boards, shown as published, kept out of the index10
Agentic work benchmarks for Claude Haiku 4.5 and GPT-4.1 Nano
BenchmarkClaude Haiku 4.5GPT-4.1 NanoLeader
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 measured17.3%Only GPT-4.1 Nano measured
BALROG31.2%Not measuredOnly Claude Haiku 4.5 measured
DeepResearch Bench45.5%Not measuredOnly Claude Haiku 4.5 measured
Vending-Bench 2$459Not measuredOnly Claude Haiku 4.5 measured
Berkeley Function Calling Leaderboard (BFCL)68.7%33.1%Claude Haiku 4.5
MCP Atlas40.2%Not measuredOnly Claude Haiku 4.5 measured
Neither model has a result on the other 28 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index81
Reasoning benchmarks for Claude Haiku 4.5 and GPT-4.1 Nano
BenchmarkClaude Haiku 4.5GPT-4.1 NanoLeader
GPQA Diamond72.2%50.8%Claude Haiku 4.5
LiveBench reasoning61.7%Not measuredOnly Claude Haiku 4.5 measured
MMMU Pro (Vals AI)46.1%55.0%GPT-4.1 Nano
GPQA Diamond (Artificial Analysis run)Not measured51.2%Only GPT-4.1 Nano measured
Humanity's Last Exam (Artificial Analysis run)Not measured3.8%Only GPT-4.1 Nano measured
GPQA Diamond (Epoch AI run)71.2%48.9%Claude Haiku 4.5
ARC-AGI47.7%0.0%Claude Haiku 4.5
ARC-AGI-24.0%0.0%Claude Haiku 4.5
Chess puzzles8.0%0.0%Claude Haiku 4.5
LMArena Text: hard prompts14211286Claude Haiku 4.5
LMArena Text: expert14431271Claude Haiku 4.5
LMArena Text: hard prompts in English14351293Claude Haiku 4.5
Kagi LLM BenchmarkNot measured33.3%Only GPT-4.1 Nano measured
Neither model has a result on the other 10 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index60
Math benchmarks for Claude Haiku 4.5 and GPT-4.1 Nano
BenchmarkClaude Haiku 4.5GPT-4.1 NanoLeader
AIME82.7%26.5%Claude Haiku 4.5
MATH 500 (Vals AI)Not measured80.2%Only GPT-4.1 Nano measured
MGSM (Vals AI)92.2%69.3%Claude Haiku 4.5
AA Math IndexNot measured24.0Only GPT-4.1 Nano measured
AIME 2025 (Artificial Analysis run)Not measured24.0%Only GPT-4.1 Nano measured
OTIS Mock AIME66.7%28.9%Claude Haiku 4.5
MATH level 596.4%70.0%Claude Haiku 4.5
LMArena Text: math13981274Claude Haiku 4.5
LMArena Text: mathematical work14301274Claude 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 index110
Knowledge benchmarks for Claude Haiku 4.5 and GPT-4.1 Nano
BenchmarkClaude Haiku 4.5GPT-4.1 NanoLeader
MMLU Pro78.7%63.5%Claude Haiku 4.5
LegalBench (Vals AI)81.2%61.1%Claude Haiku 4.5
CaseLaw (Vals AI)56.5%Not measuredOnly Claude Haiku 4.5 measured
CorpFin (Vals AI)60.6%42.1%Claude Haiku 4.5
TaxEval (Vals AI)67.5%60.8%Claude Haiku 4.5
MortgageTax (Vals AI)62.2%52.8%Claude Haiku 4.5
MedQA (Vals AI)79.6%68.2%Claude Haiku 4.5
MedCode (Vals AI)32.7%Not measuredOnly Claude Haiku 4.5 measured
MMLU Pro (Artificial Analysis run)Not measured65.7%Only GPT-4.1 Nano measured
SimpleQA Verified13.2%6.0%Claude Haiku 4.5
LMArena Text: science14061297Claude Haiku 4.5
LMArena Text: medicine and healthcare13941276Claude Haiku 4.5
LMArena Text: legal and government14001300Claude Haiku 4.5
LMArena Text: business and finance14001267Claude Haiku 4.5
Neither model has a result on the other 6 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index60
Web design benchmarks for Claude Haiku 4.5 and GPT-4.1 Nano
BenchmarkClaude Haiku 4.5GPT-4.1 NanoLeader
Design Arena: websites1122973Claude Haiku 4.5
Design Arena: UI components1097913Claude Haiku 4.5
Design Arena: game dev1096970Claude Haiku 4.5
Design Arena: data viz1124891Claude Haiku 4.5
Design Arena: 3D1071924Claude Haiku 4.5
Design Arena: all code categories1114962Claude Haiku 4.5
Design Arena: SVG1025Not measuredOnly Claude Haiku 4.5 measured
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 index150
General benchmarks for Claude Haiku 4.5 and GPT-4.1 Nano
BenchmarkClaude Haiku 4.5GPT-4.1 NanoLeader
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 measured32.0%Only GPT-4.1 Nano measured
Long context reasoning (AA-LCR)Not measured20.3%Only GPT-4.1 Nano measured
DTBench73.6%52.5%Claude Haiku 4.5
LMCA30.9%5.5%Claude Haiku 4.5
Fiction.LiveBenchNot measured25.0%Only GPT-4.1 Nano measured
ExploitBench13.7%Not measuredOnly Claude Haiku 4.5 measured
LMArena Text13971285Claude Haiku 4.5
LMArena Text: instruction following14141266Claude Haiku 4.5
LMArena Text: creative writing13711260Claude Haiku 4.5
LMArena VisionNot measured1063Only GPT-4.1 Nano measured
LMArena Text: English14141303Claude Haiku 4.5
LMArena Text: non-English13771260Claude Haiku 4.5
LMArena Text: Chinese14181270Claude Haiku 4.5
LMArena Text: German13741288Claude Haiku 4.5
LMArena Text: Japanese13381198Claude Haiku 4.5
LMArena Text: Korean1346Not measuredOnly Claude Haiku 4.5 measured
LMArena Text: French1411Not measuredOnly Claude Haiku 4.5 measured
LMArena Text: Spanish1421Not measuredOnly Claude Haiku 4.5 measured
LMArena Text: Russian13811261Claude Haiku 4.5
LMArena Text: Polish1343Not measuredOnly Claude Haiku 4.5 measured
LMArena Text: multi-turn14091277Claude Haiku 4.5
LMArena Text: longer queries14271283Claude Haiku 4.5
LMArena Text: writing and language13861261Claude Haiku 4.5
LMArena Text: entertainment and media13691243Claude Haiku 4.5
LMArena Vision: EnglishNot measured1101Only GPT-4.1 Nano measured
LMArena Document1420Not measuredOnly Claude Haiku 4.5 measured
MultiChallenge50.5%Not measuredOnly Claude Haiku 4.5 measured
EQ-Bench 41064Not measuredOnly Claude Haiku 4.5 measured
Neither model has a result on the other 15 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 GPT-4.1 Nano
BenchmarkClaude Haiku 4.5GPT-4.1 NanoLeader
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
GPT-4.1 Nano$0.0003Fits in one request

GPT-4.1 Nano costs less

Repository review

50K input + 3K output tokens

Claude Haiku 4.5$0.065Fits in one request
GPT-4.1 Nano$0.0062Fits in one request

GPT-4.1 Nano costs less

Agent loop

200K input + 10K output tokens

Claude Haiku 4.5$0.250Exceeds the context window
GPT-4.1 Nano$0.024Fits in one request

GPT-4.1 Nano 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 GPT-4.1 Nano
SpecificationAnthropic Claude Haiku 4.5OpenAI GPT-4.1 Nano
MakerAnthropicOpenAI
WeightsNo public weights listedNo public weights listed
ReleasedOctober 15, 2025April 14, 2025
Context window200K1.05M
Input $/Mtok$1.00$0.10
Output $/Mtok$5.00$0.40
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 GPT-4.1 Nano for coding?

Only Claude Haiku 4.5 has a coding score, 35.6 on the Vibe Coding Index; GPT-4.1 Nano has none, so the two cannot be ranked on coding. Pick GPT-4.1 Nano for output tokens 12.5x cheaper ($0.40 vs $5.00 per million) and a larger context window (1.05M against 200K tokens).

Which is cheaper, Claude Haiku 4.5 or GPT-4.1 Nano?

Claude Haiku 4.5 costs $1.00 per million input tokens and $5.00 per million output tokens; GPT-4.1 Nano costs $0.10 and $0.40. Cost per solved task is known for Claude Haiku 4.5 only.

Which has the bigger context window, Claude Haiku 4.5 or GPT-4.1 Nano?

GPT-4.1 Nano, with 1.05M tokens against 200K.

How many benchmarks is the Claude Haiku 4.5 vs GPT-4.1 Nano comparison based on?

55 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 GPT-4.1 Nano's on 0. Where only one model has a result, the page says so instead of naming a winner.

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