Noometry

Model comparison

Claude Haiku 4.5 vs Solar Pro4

Solar Pro4 is the stronger model overall, scoring 42.1 to 39.5 on the Noometry Index.

Last verified . 18 shared benchmarks.

Claude Haiku 4.5 Anthropic

39.5

Rank #165 Confirmed

Solar Pro4 Upstage

42.1

Rank #121 Confirmed

Summary

  • They share 18 benchmarks with published results for both. Claude Haiku 4.5 scores higher in 5 categories and Solar Pro4 in 3 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Solar Pro4 leads 28.5 to 15.1.
  • Solar Pro4 is cheaper at $0.30 / $1.20 per million input/output tokens, against $1 / $5 for Claude Haiku 4.5.
  • Solar Pro4 accepts more context: 524K tokens versus 200K.

Side by side

Claude Haiku 4.5Solar Pro4
ProviderAnthropicUpstage
Noometry Index39.542.1
Released2025-10-152026-08-06
WeightsProprietaryProprietary
Context window200K524K
Max output64K131K
Input $ / M tokens$1$0.30
Output $ / M tokens$5$1.20
Results tracked5318

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Category by category

Coding Claude Haiku 4.5 leads

Claude Haiku 4.5: 44.0 (#78), Solar Pro4: 40.1 (#149)

BenchmarkClaude Haiku 4.5Solar Pro4
LMArena WebDev13301371
LMArena Coding14531437
SWE-bench Verified (bash only)66.6%—
SWE-bench Multilingual64.7%—
SciCode43.3%—
WeirdML45.4%—
ALE-Bench653.48—

Agentic & Tool Use Not comparable

Claude Haiku 4.5: 33.6 (#52), Solar Pro4: —

BenchmarkClaude Haiku 4.5Solar Pro4
Terminal-Bench35.5%—
Berkeley Function Calling Leaderboard68.7%—
DeepResearch Bench45.5%—
BALROG31.2%—
ExploitBench13.7%—
Vending-Bench 2458.89—

Reasoning Solar Pro4 leads

Claude Haiku 4.5: 15.1 (#320), Solar Pro4: 28.5 (#104)

BenchmarkClaude Haiku 4.5Solar Pro4
LMArena Hard Prompts14201399
ARC-AGI-24%—
NYT Connections (extended)14.3%—
ARC-AGI-147.7%—
CritPt0%—
Chess Puzzles8%—
DTBench73.6%—
LMCA30.9%—
Epoch Capabilities Index142.41—
ForecastBench61.4—

Math Claude Haiku 4.5 leads

Claude Haiku 4.5: 44.9 (#78), Solar Pro4: 38.8 (#128)

BenchmarkClaude Haiku 4.5Solar Pro4
LMArena Math13961416
OTIS Mock AIME 2024-202566.7%—
Omni-MATH56.1%—
MATH Level 596.4%—
FrontierMath (Feb 2025 set)5.9%—
FrontierMath Tier 4 (v1)2.1%—

Knowledge Solar Pro4 leads

Claude Haiku 4.5: 37.7 (#153), Solar Pro4: 39.8 (#129)

BenchmarkClaude Haiku 4.5Solar Pro4
LMArena Expert14421427
GPQA Diamond71.2%—
SimpleQA Verified13.2%—
MMLU-Pro77.7%—
Vectara Hallucination Rate9.8%—
GPQA (HELM)60.5%—

Multimodal Not comparable

Claude Haiku 4.5: 26.8 (#118), Solar Pro4: —

BenchmarkClaude Haiku 4.5Solar Pro4
Blueprint-Bench 20%—
LMArena Document1420—

Multilingual Claude Haiku 4.5 leads

Claude Haiku 4.5: 49.9 (#129), Solar Pro4: 48.7 (#139)

BenchmarkClaude Haiku 4.5Solar Pro4
LMArena Non-English13771361
LMArena Chinese14171415
LMArena French14081397
LMArena German13751364
LMArena Japanese13391309
LMArena Korean13471382
LMArena Russian13811360
LMArena Spanish14201401

Instruction Following Solar Pro4 leads

Claude Haiku 4.5: 71.4 (#149), Solar Pro4: 72.7 (#132)

BenchmarkClaude Haiku 4.5Solar Pro4
LMArena Instruction Following14141377
IFEval80.1%—

Long Context Claude Haiku 4.5 leads

Claude Haiku 4.5: 43.6 (#92), Solar Pro4: 42.1 (#130)

BenchmarkClaude Haiku 4.5Solar Pro4
LMArena Longer Query14271381

Writing & Preference Claude Haiku 4.5 leads

Claude Haiku 4.5: 57.9 (#123), Solar Pro4: 56.5 (#138)

BenchmarkClaude Haiku 4.5Solar Pro4
LMArena Text13961386
LMArena Creative Writing13721316
LMArena Multi-Turn14091385
WildBench83.9%—
EQ-Bench 41064—

Frequently asked questions

Is Claude Haiku 4.5 better than Solar Pro4?

Solar Pro4 is the stronger model overall, scoring 42.1 to 39.5 on the Noometry Index.

Which is cheaper, Claude Haiku 4.5 or Solar Pro4?

Solar Pro4 is cheaper. It lists at $0.30 per million input tokens and $1.20 per million output tokens; Claude Haiku 4.5 lists at $1 and $5.

Is Claude Haiku 4.5 or Solar Pro4 better for coding?

Claude Haiku 4.5 scores higher on coding benchmarks: 44.0 versus 40.1 in the Noometry coding category.

Which has the bigger context window?

Solar Pro4 does, with 524K tokens against 200K.

How many benchmarks do Claude Haiku 4.5 and Solar Pro4 share?

18 benchmarks have published results for both models. Claude Haiku 4.5 has 53 scored results on Noometry and Solar Pro4 has 18.

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