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GPT-4 vs Solar Pro 4

Solar Pro 4 leads GPT-4 on the Artificial Analysis Intelligence Index, 28.2 to 6.7, and Solar Pro 4 costs 100.0x less per output token ($0.60 vs $60.00 per million). Updated October 22, 2026; 31 benchmarks have a result for both.

Replace GPT-4 Replace Solar Pro 4
GPT-4OpenAI
Coding
No data
Overall
No data
Output $/M
$60.00
0
Solar Pro 4Upstage
Coding
No data
Overall
No data
Output $/M
$0.60
31
vs boards won of 31 shared

GPT-4 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 for work measured by AA Coding Index or LMArena Text: coding, where it leads.

Model AGPT-4OpenAINot benchmarkedNo coding benchmarkNo cost per solved taskModel BSolar Pro 4UpstageNot benchmarked1 independent benchmarkNo cost per solved task
Shared results
31
GPT-4 only
14
Solar Pro 4 only
14
Like-for-like categories
6 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 not benchmarked, Solar Pro 4 not benchmarked.
Widest category
Reasoning, 42.6 points apart on average over 4 shared benchmarks.
Widest single gap
GPQA Diamond (Artificial Analysis run): GPT-4 34.9% against Solar Pro 4 89.1%, 54.2 points apart on a 0 to 100 scale.
Output price
GPT-4 $60.00 against Solar Pro 4 $0.60 per million output tokens, 100.0x apart.
Context window
GPT-4 takes 8K 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-4BarsSolar Pro 4Ties
Coding03
Intelligence01
Reasoning04
Math02
Knowledge04
General017
All shared boards031
CodingLike-for-likeSix of these boards feed the Vibe Coding Index03
Coding benchmarks for GPT-4 and Solar Pro 4
BenchmarkGPT-4Solar Pro 4Leader
SWE-bench Verified22.4%Not measuredOnly GPT-4 measured
SWE-bench Lite39.7%Not measuredOnly GPT-4 measured
SWE-bench (full test set)12.5%Not measuredOnly GPT-4 measured
LMArena WebDevNot measured1371Only Solar Pro 4 measured
AA Coding Index13.152.7Solar Pro 4
SciCodeNot measured48.0%Only Solar Pro 4 measured
ALE-BenchNot measured179.3Only Solar Pro 4 measured
LMArena Text: coding12091438Solar Pro 4
LMArena Text: software and IT11951431Solar Pro 4
LMArena WebDev: ReactNot measured1363Only Solar Pro 4 measured
LMArena WebDev: HTMLNot measured1371Only Solar Pro 4 measured
Neither model has a result on the other 28 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index01
Intelligence benchmarks for GPT-4 and Solar Pro 4
BenchmarkGPT-4Solar Pro 4Leader
AA Intelligence Index6.728.2Solar Pro 4
Epoch Capabilities Index125.7Not measuredOnly GPT-4 measured
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index1 board, none shared
Agentic work benchmarks for GPT-4 and Solar Pro 4
BenchmarkGPT-4Solar Pro 4Leader
Design Arena: agents building web appsNot measured1105Only Solar Pro 4 measured
Neither model has a result on the other 40 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index04
Reasoning benchmarks for GPT-4 and Solar Pro 4
BenchmarkGPT-4Solar Pro 4Leader
GPQA Diamond (Artificial Analysis run)34.9%89.1%Solar Pro 4
Humanity's Last Exam (Artificial Analysis run)Not measured29.8%Only Solar Pro 4 measured
BIG-Bench Hard75.1%Not measuredOnly GPT-4 measured
LMArena Text: hard prompts12001400Solar Pro 4
LMArena Text: expert11491428Solar Pro 4
LMArena Text: hard prompts in English12091427Solar Pro 4
Neither model has a result on the other 16 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index02
Math benchmarks for GPT-4 and Solar Pro 4
BenchmarkGPT-4Solar Pro 4Leader
GSM8K92.0%Not measuredOnly GPT-4 measured
LMArena Text: math12301421Solar Pro 4
LMArena Text: mathematical work12281427Solar Pro 4
Neither model has a result on the other 10 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index04
Knowledge benchmarks for GPT-4 and Solar Pro 4
BenchmarkGPT-4Solar Pro 4Leader
MMLU Pro (Artificial Analysis run)56.2%Not measuredOnly GPT-4 measured
MMLU86.4%Not measuredOnly GPT-4 measured
AI2 Reasoning Challenge96.3%Not measuredOnly GPT-4 measured
LMArena Text: science11771404Solar Pro 4
LMArena Text: medicine and healthcare11451374Solar Pro 4
LMArena Text: legal and government11911383Solar Pro 4
LMArena Text: business and finance11451381Solar Pro 4
Neither model has a result on the other 11 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index6 boards, none shared
Web design benchmarks for GPT-4 and Solar Pro 4
BenchmarkGPT-4Solar Pro 4Leader
Design Arena: websitesNot measured1176Only Solar Pro 4 measured
Design Arena: UI componentsNot measured1147Only Solar Pro 4 measured
Design Arena: game devNot measured1169Only Solar Pro 4 measured
Design Arena: data vizNot measured1177Only Solar Pro 4 measured
Design Arena: 3DNot measured1178Only Solar Pro 4 measured
Design Arena: all code categoriesNot measured1182Only Solar Pro 4 measured
Neither model has a result on the other 3 boards here
GeneralLike-for-likePublic boards, shown as published, kept out of the index017
General benchmarks for GPT-4 and Solar Pro 4
BenchmarkGPT-4Solar Pro 4Leader
IFBench33.2%Not measuredOnly GPT-4 measured
Long context reasoning (AA-LCR)Not measured70.7%Only Solar Pro 4 measured
DTBench62.7%Not measuredOnly GPT-4 measured
LMCA17.1%Not measuredOnly GPT-4 measured
HellaSwag95.3%Not measuredOnly GPT-4 measured
WinoGrande87.5%Not measuredOnly GPT-4 measured
LMArena Text12061388Solar Pro 4
LMArena Text: instruction following12011375Solar Pro 4
LMArena Text: creative writing11911317Solar Pro 4
LMArena Text: English12201414Solar Pro 4
LMArena Text: non-English11941363Solar Pro 4
LMArena Text: Chinese11841422Solar Pro 4
LMArena Text: German11981358Solar Pro 4
LMArena Text: Japanese11371320Solar Pro 4
LMArena Text: Korean10871383Solar Pro 4
LMArena Text: French12201400Solar Pro 4
LMArena Text: Spanish11971409Solar Pro 4
LMArena Text: Russian11951357Solar Pro 4
LMArena Text: Polish12651304Solar Pro 4
LMArena Text: multi-turn12061385Solar Pro 4
LMArena Text: longer queries11901382Solar Pro 4
LMArena Text: writing and language12191344Solar Pro 4
LMArena Text: entertainment and media11841332Solar Pro 4
Neither model has a result on the other 23 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for GPT-4 and Solar Pro 4
BenchmarkGPT-4Solar 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$0.060Fits 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$1.68Exceeds the context window
Solar Pro 4$0.0093Fits in one request

Solar Pro 4 costs less

Agent loop

200K input + 10K output tokens

GPT-4$6.60Exceeds the context window
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 and Solar Pro 4
SpecificationOpenAI GPT-4Upstage Solar Pro 4
MakerOpenAIUpstage
WeightsNo public weights listedNo public weights listed
ReleasedMay 28, 2023August 10, 2026
Context window8K524K
Input $/Mtok$30.00$0.15
Output $/Mtok$60.00$0.60
Coding indexNot benchmarkedNot benchmarked
Independent measurements behind it01
Cost per solved taskNot computableNot computable
SourceOpenRouter listingOpenRouter listing

Questions

Is GPT-4 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 for work measured by AA Coding Index or LMArena Text: coding, where it leads.

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

GPT-4 costs $30.00 per million input tokens and $60.00 per million output tokens; Solar Pro 4 costs $0.15 and $0.60. Cost per solved task is known for neither of them.

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

Solar Pro 4, with 524K tokens against 8K.

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

31 benchmarks have a result for both models as of October 22, 2026. GPT-4'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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