Noometry

Model comparison

Claude Opus 5.5 vs Solar Pro 3

Claude Opus 5.5 has enough public results to be ranked (#3); Solar Pro 3 does not yet, so treat this comparison as directional.

Last verified . 2 shared benchmarks.

Claude Opus 5.5 Anthropic

68.5

Rank #3 Confirmed

Solar Pro 3 Upstage

33.3

Unranked Sparse

Summary

  • They share 2 benchmarks with published results for both. Claude Opus 5.5 scores higher in 2 categories and Solar Pro 3 in 0 categories; 2 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Claude Opus 5.5 leads 79.5 to 21.7.
  • The biggest single-benchmark swing is SciCode: 66.9% for Claude Opus 5.5 and 24.7% for Solar Pro 3.
  • Solar Pro 3 is cheaper at $0.25 / $0.25 per million input/output tokens, against $4 / $20 for Claude Opus 5.5.
  • Claude Opus 5.5 accepts more context: 1M tokens versus 131K.

Side by side

Claude Opus 5.5Solar Pro 3
ProviderAnthropicUpstage
Noometry Index68.533.3
Released2026-09-222026-01
WeightsProprietaryProprietary
Context window1M131K
Max output128K8K
Input $ / M tokens$4$0.25
Output $ / M tokens$20$0.25
Results tracked352

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Category by category

Coding Claude Opus 5.5 leads

Claude Opus 5.5: 71.4 (#1), Solar Pro 3: 34.2

BenchmarkClaude Opus 5.5Solar Pro 3
SciCode66.9%24.7%
FrontierCode54.4%—
CursorBench57.8%—
LMArena WebDev1820—
FrontierSWE62.3%—
LMArena Coding1545—
MirrorCode77.4%—

Agentic & Tool Use Not comparable

Claude Opus 5.5: 45.3 (#13), Solar Pro 3: —

BenchmarkClaude Opus 5.5Solar Pro 3
APEX-Agents73.5%—
GDP.pdf30.6%—

Reasoning Claude Opus 5.5 leads

Claude Opus 5.5: 79.5 (#2), Solar Pro 3: 21.7

BenchmarkClaude Opus 5.5Solar Pro 3
CritPt31.7%0%
ARC-AGI-292.5%—
NYT Connections (extended)88.5%—
ARC-AGI-197.5%—
EBR-Bench71.4%—
LMArena Hard Prompts1545—
Mystery Game Puzzles71%—
DTBench98.9%—
LMCA68.2%—

Math Not comparable

Claude Opus 5.5: 92.4 (#2), Solar Pro 3: —

BenchmarkClaude Opus 5.5Solar Pro 3
FrontierMath (Tiers 1-3)91.2%—
FrontierMath Tier 495%—
OTIS Mock AIME 2024-2025100%—
ProofBench100%—

Knowledge Not comparable

Claude Opus 5.5: 66.6 (#9), Solar Pro 3: —

BenchmarkClaude Opus 5.5Solar Pro 3
GPQA Diamond90.6%—
SimpleQA Verified72.2%—
LMArena Expert1564—

Multimodal Not comparable

Claude Opus 5.5: 56.5 (#2), Solar Pro 3: —

BenchmarkClaude Opus 5.5Solar Pro 3
Furniture Assembly83.3%—

Multilingual Not comparable

Claude Opus 5.5: 59.8 (#1), Solar Pro 3: —

BenchmarkClaude Opus 5.5Solar Pro 3
LMArena Non-English1513—
LMArena Chinese1572—
LMArena Russian1532—

Instruction Following Not comparable

Claude Opus 5.5: 80.1 (#2), Solar Pro 3: —

BenchmarkClaude Opus 5.5Solar Pro 3
LMArena Instruction Following1535—

Long Context Not comparable

Claude Opus 5.5: 47.3 (#18), Solar Pro 3: —

BenchmarkClaude Opus 5.5Solar Pro 3
LMArena Longer Query1540—

Writing & Preference Not comparable

Claude Opus 5.5: 78.7 (#3), Solar Pro 3: —

BenchmarkClaude Opus 5.5Solar Pro 3
LMArena Text1518—
LMArena Creative Writing1538—
EQ-Bench Creative Writing2050—
LMArena Multi-Turn1520—

Frequently asked questions

Is Claude Opus 5.5 better than Solar Pro 3?

Claude Opus 5.5 has enough public results to be ranked (#3); Solar Pro 3 does not yet, so treat this comparison as directional.

Which is cheaper, Claude Opus 5.5 or Solar Pro 3?

Solar Pro 3 is cheaper. It lists at $0.25 per million input tokens and $0.25 per million output tokens; Claude Opus 5.5 lists at $4 and $20.

Is Claude Opus 5.5 or Solar Pro 3 better for coding?

Claude Opus 5.5 scores higher on coding benchmarks: 71.4 versus 34.2 in the Noometry coding category.

Which has the bigger context window?

Claude Opus 5.5 does, with 1M tokens against 131K.

How many benchmarks do Claude Opus 5.5 and Solar Pro 3 share?

2 benchmarks have published results for both models. Claude Opus 5.5 has 35 scored results on Noometry and Solar Pro 3 has 2.

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