Noometry

Model comparison

Claude 2 vs Claude Opus 4.8

Claude Opus 4.8 is the stronger model overall, scoring 60.7 to 25.0 on the Noometry Index.

Last verified . 4 shared benchmarks.

Claude 2 Anthropic

25.0

Rank #346 Reported

Claude Opus 4.8 Anthropic

60.7

Rank #13 Confirmed

Summary

  • They share 4 benchmarks with published results for both. Claude 2 scores higher in 0 categories and Claude Opus 4.8 in 3 categories; 3 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Opus 4.8 leads 78.4 to 9.3.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 2.5% for Claude 2 and 98.3% for Claude Opus 4.8.

Side by side

Claude 2Claude Opus 4.8
ProviderAnthropicAnthropic
Noometry Index25.060.7
Released2023-07-112026-05-28
WeightsProprietaryProprietary
Context window—1M
Max output—128K
Input $ / M tokens—$5
Output $ / M tokens—$25
Results tracked865

Sponsored placements are available on pages like this one. Advertise on Noometry

Category by category

Coding Not comparable

Claude 2: —, Claude Opus 4.8: 59.9 (#12)

BenchmarkClaude 2Claude Opus 4.8
DeepSWE—59%
FrontierCode—46.5%
LMArena WebDev—1556
SciCode—53.5%
GSO—47.1%
WeirdML—82.9%
LMArena Coding—1490
ALE-Bench—1,564
HumanEval+61.6%—

Agentic & Tool Use Not comparable

Claude 2: —, Claude Opus 4.8: 47.6 (#11)

BenchmarkClaude 2Claude Opus 4.8
APEX-Agents—48.9%
OSWorld 2.0—20.6%
Remote Labor Index—8.3%
τ²-bench Banking—39.7%
DeepResearch Bench—50.2%
PostTrainBench—33.8%
GBAEval—70.9%
GDP.pdf—24%
LMArena Search—1204
Vending-Bench 2—5,787

Reasoning Claude Opus 4.8 leads

Claude 2: 21.7 (#216), Claude Opus 4.8: 64.7 (#16)

BenchmarkClaude 2Claude Opus 4.8
DTBench51.9%94.9%
Epoch Capabilities Index120.13158.21
ARC-AGI-2—72.1%
SimpleBench—64.8%
Kagi LLM Benchmark—88.8%
NYT Connections (extended)—91.1%
ARC-AGI-1—92.5%
CritPt—20.9%
Chess Puzzles—34%
EnigmaEval—23.5%
EBR-Bench—28.6%
LMArena Hard Prompts—1482
Mystery Game Puzzles—36%
LMCA—57.5%
Surface Evolver Bench—87.5%
Bench to the Future 3—0.14
ForecastBench—59.9

Math Claude Opus 4.8 leads

Claude 2: 9.3 (#320), Claude Opus 4.8: 78.4 (#13)

BenchmarkClaude 2Claude Opus 4.8
OTIS Mock AIME 2024-20252.5%98.3%
FrontierMath (Tiers 1-3)—80%
FrontierMath Tier 4—56.1%
MathArena Final-Answer Competitions—91.8%
ProofBench—69%
LMArena Math—1487
MATH Level 511.7%—
FrontierMath (Feb 2025 set)—47.2%
FrontierMath Tier 4 (v1)—31.3%

Knowledge Claude Opus 4.8 leads

Claude 2: 16.9 (#287), Claude Opus 4.8: 61.3 (#29)

BenchmarkClaude 2Claude Opus 4.8
GPQA Diamond34.7%91%
SimpleQA Verified—53%
LMArena Expert—1502
MMLU78.5%—
TriviaQA87.5%—

Multimodal Not comparable

Claude 2: —, Claude Opus 4.8: 42.9 (#26)

BenchmarkClaude 2Claude Opus 4.8
LMArena Vision—1294
Blueprint-Bench 2—14.5%
Furniture Assembly—42.5%
LMArena Document—1475

Multilingual Not comparable

Claude 2: —, Claude Opus 4.8: 55.2 (#33)

BenchmarkClaude 2Claude Opus 4.8
LMArena Non-English—1450
LMArena Chinese—1507
LMArena French—1481
LMArena German—1472
LMArena Japanese—1440
LMArena Korean—1432
LMArena Russian—1474
LMArena Spanish—1466

Instruction Following Not comparable

Claude 2: —, Claude Opus 4.8: 77.4 (#24)

BenchmarkClaude 2Claude Opus 4.8
LMArena Instruction Following—1476

Long Context Not comparable

Claude 2: —, Claude Opus 4.8: 45.4 (#35)

BenchmarkClaude 2Claude Opus 4.8
LMArena Longer Query—1483

Writing & Preference Not comparable

Claude 2: —, Claude Opus 4.8: 72.0 (#16)

BenchmarkClaude 2Claude Opus 4.8
LMArena Text—1461
LMArena Creative Writing—1454
EQ-Bench Creative Writing—1840
EQ-Bench 4—1281
LMArena Multi-Turn—1476

Frequently asked questions

Is Claude 2 better than Claude Opus 4.8?

Claude Opus 4.8 is the stronger model overall, scoring 60.7 to 25.0 on the Noometry Index.

How many benchmarks do Claude 2 and Claude Opus 4.8 share?

4 benchmarks have published results for both models. Claude 2 has 8 scored results on Noometry and Claude Opus 4.8 has 65.

Related comparisons

Go deeper