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GPT-4.1 vs Solar Pro 4

Solar Pro 4 leads GPT-4.1 on the Artificial Analysis Intelligence Index, 28.2 to 12.7, and Solar Pro 4 costs 13.3x less per output token ($0.60 vs $8.00 per million). Updated October 22, 2026; 39 benchmarks have a result for both.

Replace GPT-4.1 Replace Solar Pro 4
GPT-4.1OpenAI
Coding
No data
Overall
36.5
Output $/M
$8.00
12
Solar Pro 4Upstage
Coding
No data
Overall
No data
Output $/M
$0.60
27
vs boards won of 39 shared

GPT-4.1 or Solar Pro 4: which to pick

Neither model has a coding score yet, so the two cannot be ranked on coding.

Pick GPT-4.1 for a larger context window (1.05M against 524K tokens) and work measured by LMArena Text: coding or LMArena Text: software and IT, where it leads.

Model AGPT-4.1OpenAINot benchmarkedNo coding benchmark$0.37 per solved taskModel BSolar Pro 4UpstageNot benchmarked1 independent benchmarkNo cost per solved task
Shared results
39
GPT-4.1 only
53
Solar Pro 4 only
6
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
GPT-4.1 not benchmarked, Solar Pro 4 not benchmarked.
Widest category
Web design, 19.5 points apart on average over 6 shared benchmarks.
Widest single gap
Design Arena: 3D: GPT-4.1 849 against Solar Pro 4 1178, 41.1 points apart on a 0 to 100 scale.
Output price
GPT-4.1 $8.00 against Solar Pro 4 $0.60 per million output tokens, 13.3x apart.
Context window
GPT-4.1 takes 1.05M tokens, Solar Pro 4 524K.

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
CategoryGPT-4.1BarsSolar Pro 4Ties
Coding12
Intelligence01
Reasoning05
Math02
Knowledge22
Web design06
General99
All shared boards1227
CodingLike-for-likeSix of these boards feed the Vibe Coding Index12
Coding benchmarks for GPT-4.1 and Solar Pro 4
BenchmarkGPT-4.1Solar Pro 4Leader
Aider polyglot52.4%Not measuredOnly GPT-4.1 measured
SWE-bench Verified39.6%Not measuredOnly GPT-4.1 measured
SWE-bench Multimodal31.1%Not measuredOnly GPT-4.1 measured
LMArena WebDevNot measured1371Only Solar Pro 4 measured
AA Coding IndexNot measured52.7Only Solar Pro 4 measured
LiveCodeBench (Vals AI)54.7%Not measuredOnly GPT-4.1 measured
LiveCodeBench (Artificial Analysis run)45.7%Not measuredOnly GPT-4.1 measured
SciCodeNot measured48.0%Only Solar Pro 4 measured
Terminal-Bench Hard (Artificial Analysis run)13.6%Not measuredOnly GPT-4.1 measured
WeirdML39.0%Not measuredOnly GPT-4.1 measured
ALE-Bench558.1179.3GPT-4.1
LMArena Text: coding13901438Solar Pro 4
LMArena Text: software and IT13911431Solar Pro 4
LMArena WebDev: ReactNot measured1363Only Solar Pro 4 measured
LMArena WebDev: HTMLNot measured1371Only Solar Pro 4 measured
SciCode4.6%Not measuredOnly GPT-4.1 measured
Neither model has a result on the other 23 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
Intelligence benchmarks for GPT-4.1 and Solar Pro 4
BenchmarkGPT-4.1Solar Pro 4Leader
AA Intelligence Index12.728.2Solar Pro 4
Epoch Capabilities Index136.7Not measuredOnly GPT-4.1 measured
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index4 boards, none shared
Agentic work benchmarks for GPT-4.1 and Solar Pro 4
BenchmarkGPT-4.1Solar Pro 4Leader
Design Arena: agents building web appsNot measured1105Only Solar Pro 4 measured
τ²-Bench Telecom47.1%Not measuredOnly GPT-4.1 measured
Berkeley Function Calling Leaderboard (BFCL)54.0%Not measuredOnly GPT-4.1 measured
BrowseComp-Plus36.4%Not measuredOnly GPT-4.1 measured
Neither model has a result on the other 37 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index05
Reasoning benchmarks for GPT-4.1 and Solar Pro 4
BenchmarkGPT-4.1Solar Pro 4Leader
GPQA Diamond65.4%Not measuredOnly GPT-4.1 measured
MMMU Pro (Vals AI)72.4%Not measuredOnly GPT-4.1 measured
GPQA Diamond (Artificial Analysis run)66.6%89.1%Solar Pro 4
Humanity's Last Exam (Artificial Analysis run)4.2%29.8%Solar Pro 4
GPQA Diamond (Epoch AI run)66.9%Not measuredOnly GPT-4.1 measured
ARC-AGI5.5%Not measuredOnly GPT-4.1 measured
ARC-AGI-20.4%Not measuredOnly GPT-4.1 measured
SimpleBench27.0%Not measuredOnly GPT-4.1 measured
Chess puzzles3.0%Not measuredOnly GPT-4.1 measured
LMArena Text: hard prompts13841400Solar Pro 4
LMArena Text: expert13641428Solar Pro 4
LMArena Text: hard prompts in English13931427Solar Pro 4
LMArena Vision: diagrams1215Not measuredOnly GPT-4.1 measured
LMArena Vision: homework1248Not measuredOnly GPT-4.1 measured
Kagi LLM Benchmark52.3%Not measuredOnly GPT-4.1 measured
Neither model has a result on the other 7 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index02
Math benchmarks for GPT-4.1 and Solar Pro 4
BenchmarkGPT-4.1Solar Pro 4Leader
AIME39.6%Not measuredOnly GPT-4.1 measured
MATH 500 (Vals AI)87.2%Not measuredOnly GPT-4.1 measured
MGSM (Vals AI)87.7%Not measuredOnly GPT-4.1 measured
AA Math Index34.7Not measuredOnly GPT-4.1 measured
AIME 2025 (Artificial Analysis run)34.7%Not measuredOnly GPT-4.1 measured
OTIS Mock AIME38.3%Not measuredOnly GPT-4.1 measured
FrontierMath, tiers 1 to 36.0%Not measuredOnly GPT-4.1 measured
MATH level 583.0%Not measuredOnly GPT-4.1 measured
LMArena Text: math13691421Solar Pro 4
LMArena Text: mathematical work13601427Solar Pro 4
Neither model has a result on the other 3 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index22
Knowledge benchmarks for GPT-4.1 and Solar Pro 4
BenchmarkGPT-4.1Solar Pro 4Leader
MMLU Pro80.5%Not measuredOnly GPT-4.1 measured
LegalBench (Vals AI)83.1%Not measuredOnly GPT-4.1 measured
CaseLaw (Vals AI)69.9%Not measuredOnly GPT-4.1 measured
CorpFin (Vals AI)63.0%Not measuredOnly GPT-4.1 measured
TaxEval (Vals AI)75.1%Not measuredOnly GPT-4.1 measured
MortgageTax (Vals AI)65.9%Not measuredOnly GPT-4.1 measured
MedQA (Vals AI)91.2%Not measuredOnly GPT-4.1 measured
MMLU Pro (Artificial Analysis run)80.6%Not measuredOnly GPT-4.1 measured
SimpleQA Verified31.1%Not measuredOnly GPT-4.1 measured
GeoBench72.0%Not measuredOnly GPT-4.1 measured
LMArena Text: science13821404Solar Pro 4
LMArena Text: medicine and healthcare13791374GPT-4.1
LMArena Text: legal and government13991383GPT-4.1
LMArena Text: business and finance13691381Solar Pro 4
FACTS Benchmark Suite45.8%Not measuredOnly GPT-4.1 measured
Neither model has a result on the other 3 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index06
Web design benchmarks for GPT-4.1 and Solar Pro 4
BenchmarkGPT-4.1Solar Pro 4Leader
Design Arena: websites10381176Solar Pro 4
Design Arena: UI components9971147Solar Pro 4
Design Arena: game dev10791169Solar Pro 4
Design Arena: data viz11041177Solar Pro 4
Design Arena: 3D8491178Solar Pro 4
Design Arena: all code categories10251182Solar Pro 4
Neither model has a result on the other 3 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index99
General benchmarks for GPT-4.1 and Solar Pro 4
BenchmarkGPT-4.1Solar Pro 4Leader
IFBench43.0%Not measuredOnly GPT-4.1 measured
Long context reasoning (AA-LCR)68.3%70.7%Solar Pro 4
DTBench68.3%Not measuredOnly GPT-4.1 measured
LMCA25.6%Not measuredOnly GPT-4.1 measured
Fiction.LiveBench63.9%Not measuredOnly GPT-4.1 measured
LMArena Text13831388Solar Pro 4
LMArena Text: instruction following13671375Solar Pro 4
LMArena Text: creative writing13631317GPT-4.1
LMArena Vision1210Not measuredOnly GPT-4.1 measured
LMArena Text: English13921414Solar Pro 4
LMArena Text: non-English13701363GPT-4.1
LMArena Text: Chinese13821422Solar Pro 4
LMArena Text: German13811358GPT-4.1
LMArena Text: Japanese13191320Solar Pro 4
LMArena Text: Korean13381383Solar Pro 4
LMArena Text: French13821400Solar Pro 4
LMArena Text: Spanish13761409Solar Pro 4
LMArena Text: Russian13771357GPT-4.1
LMArena Text: Polish13891304GPT-4.1
LMArena Text: multi-turn13971385GPT-4.1
LMArena Text: longer queries13851382GPT-4.1
LMArena Text: writing and language13711344GPT-4.1
LMArena Text: entertainment and media13651332GPT-4.1
LMArena Vision: English1209Not measuredOnly GPT-4.1 measured
LMArena Vision: Chinese1226Not measuredOnly GPT-4.1 measured
LMArena Vision: reading text1218Not measuredOnly GPT-4.1 measured
LMArena Vision: humor1196Not measuredOnly GPT-4.1 measured
LMArena Vision: captioning1207Not measuredOnly GPT-4.1 measured
LMArena Vision: recognizing things1208Not measuredOnly GPT-4.1 measured
LMArena Vision: creative writing1210Not measuredOnly GPT-4.1 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 GPT-4.1 and Solar Pro 4
BenchmarkGPT-4.1Solar Pro 4Leader
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

GPT-4.1$0.0060Fits in one request
Solar Pro 4$0.0004Fits in one request

Solar Pro 4 costs less

Repository review

50K input + 3K output tokens

GPT-4.1$0.124Fits in one request
Solar Pro 4$0.0093Fits in one request

Solar Pro 4 costs less

Agent loop

200K input + 10K output tokens

GPT-4.1$0.480Fits in one request
Solar Pro 4$0.036Fits in one request

Solar Pro 4 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 GPT-4.1 and Solar Pro 4
SpecificationOpenAI GPT-4.1Upstage Solar Pro 4
MakerOpenAIUpstage
WeightsNo public weights listedNo public weights listed
ReleasedApril 14, 2025August 10, 2026
Context window1.05M524K
Input $/Mtok$2.00$0.15
Output $/Mtok$8.00$0.60
Coding indexNot benchmarkedNot benchmarked
Independent measurements behind it01
Cost per solved task$0.37Not computable
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-4.1 better than Solar Pro 4 for coding?

Neither model has a coding score yet, so the two cannot be ranked on coding. Pick GPT-4.1 for a larger context window (1.05M against 524K tokens) and work measured by LMArena Text: coding or LMArena Text: software and IT, where it leads.

Which is cheaper, GPT-4.1 or Solar Pro 4?

GPT-4.1 costs $2.00 per million input tokens and $8.00 per million output tokens; Solar Pro 4 costs $0.15 and $0.60. Cost per solved task is known for GPT-4.1 only.

Which has the bigger context window, GPT-4.1 or Solar Pro 4?

GPT-4.1, with 1.05M tokens against 524K.

How many benchmarks is the GPT-4.1 vs Solar Pro 4 comparison based on?

39 benchmarks have a result for both models as of October 22, 2026. GPT-4.1's coding index rests on 0 independent benchmarks and Solar Pro 4's on 1. Where only one model has a result, the page says so instead of naming a winner.

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