Noometry

Model comparison

Claude 2 vs Claude Opus 5

Claude Opus 5 is the stronger model overall, scoring 67.8 to 25.0 on the Noometry Index.

Last verified . 4 shared benchmarks.

Claude 2 Anthropic

25.0

Rank #346 Reported

Claude Opus 5 Anthropic

67.8

Rank #4 Confirmed

Summary

  • They share 4 benchmarks with published results for both. Claude 2 scores higher in 0 categories and Claude Opus 5 in 3 categories; 3 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Opus 5 leads 86.2 to 9.3.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 2.5% for Claude 2 and 98.9% for Claude Opus 5.

Side by side

Claude 2Claude Opus 5
ProviderAnthropicAnthropic
Noometry Index25.067.8
Released2023-07-112026-07-24
WeightsProprietaryProprietary
Context window—1M
Max output—128K
Input $ / M tokens—$5
Output $ / M tokens—$25
Results tracked857

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Category by category

Coding Not comparable

Claude 2: —, Claude Opus 5: 67.5 (#5)

BenchmarkClaude 2Claude Opus 5
DeepSWE—73.6%
FrontierCode—53.4%
CursorBench—46.6%
LMArena WebDev—1691
FrontierSWE—52%
SciCode—56.4%
WeirdML—91.8%
LMArena Coding—1534
ALE-Bench—2,165
HumanEval+61.6%—

Agentic & Tool Use Not comparable

Claude 2: —, Claude Opus 5: 55.6 (#1)

BenchmarkClaude 2Claude Opus 5
APEX-Agents—65.8%
OSWorld 2.0—31.4%
τ²-bench Banking—48.7%
PostTrainBench—35%
BALROG—63.4%
GBAEval—79.6%
GDP.pdf—24%
Vending-Bench 2—11,182

Reasoning Claude Opus 5 leads

Claude 2: 21.7 (#216), Claude Opus 5: 77.2 (#4)

BenchmarkClaude 2Claude Opus 5
DTBench51.9%97.9%
Epoch Capabilities Index120.13162.78
ARC-AGI-2—90.4%
SimpleBench—80.6%
NYT Connections (extended)—94.3%
ARC-AGI-1—97.5%
CritPt—29.1%
Chess Puzzles—42%
EBR-Bench—45.7%
LMArena Hard Prompts—1526
Mystery Game Puzzles—59%
LMCA—64.5%
Bench to the Future 3—0.12

Math Claude Opus 5 leads

Claude 2: 9.3 (#320), Claude Opus 5: 86.2 (#8)

BenchmarkClaude 2Claude Opus 5
OTIS Mock AIME 2024-20252.5%98.9%
FrontierMath (Tiers 1-3)—85.6%
FrontierMath Tier 4—73.2%
ProofBench—99%
LMArena Math—1531
MATH Level 511.7%—

Knowledge Claude Opus 5 leads

Claude 2: 16.9 (#287), Claude Opus 5: 66.8 (#9)

BenchmarkClaude 2Claude Opus 5
GPQA Diamond34.7%93.9%
SimpleQA Verified—59.9%
LMArena Expert—1557
MMLU78.5%—
TriviaQA87.5%—

Multimodal Not comparable

Claude 2: —, Claude Opus 5: 50.8 (#8)

BenchmarkClaude 2Claude Opus 5
LMArena Vision—1319
Blueprint-Bench 2—30.4%
Furniture Assembly—60.8%
LMArena Document—1516

Multilingual Not comparable

Claude 2: —, Claude Opus 5: 58.8 (#4)

BenchmarkClaude 2Claude Opus 5
LMArena Non-English—1501
LMArena Chinese—1574
LMArena French—1519
LMArena German—1524
LMArena Japanese—1516
LMArena Korean—1521
LMArena Russian—1507
LMArena Spanish—1519

Instruction Following Not comparable

Claude 2: —, Claude Opus 5: 79.2 (#7)

BenchmarkClaude 2Claude Opus 5
LMArena Instruction Following—1517

Long Context Not comparable

Claude 2: —, Claude Opus 5: 46.5 (#21)

BenchmarkClaude 2Claude Opus 5
LMArena Longer Query—1515

Writing & Preference Not comparable

Claude 2: —, Claude Opus 5: 79.2 (#1)

BenchmarkClaude 2Claude Opus 5
LMArena Text—1507
LMArena Creative Writing—1491
EQ-Bench Creative Writing—2133
EQ-Bench 4—1385
LMArena Multi-Turn—1499

Frequently asked questions

Is Claude 2 better than Claude Opus 5?

Claude Opus 5 is the stronger model overall, scoring 67.8 to 25.0 on the Noometry Index.

How many benchmarks do Claude 2 and Claude Opus 5 share?

4 benchmarks have published results for both models. Claude 2 has 8 scored results on Noometry and Claude Opus 5 has 57.

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