Noometry

Model comparison

Claude 2 vs Claude Opus 4.6

Claude Opus 4.6 is the stronger model overall, scoring 58.2 to 25.0 on the Noometry Index.

Last verified . 4 shared benchmarks.

Claude 2 Anthropic

25.0

Rank #346 Reported

Claude Opus 4.6 Anthropic

58.2

Rank #20 Confirmed

Summary

  • They share 4 benchmarks with published results for both. Claude 2 scores higher in 0 categories and Claude Opus 4.6 in 3 categories; 3 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Opus 4.6 leads 63.0 to 9.3.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 2.5% for Claude 2 and 94.4% for Claude Opus 4.6.

Side by side

Claude 2Claude Opus 4.6
ProviderAnthropicAnthropic
Noometry Index25.058.2
Released2023-07-112026-02-04
WeightsProprietaryProprietary
Context window—1M
Max output—128K
Input $ / M tokens—$5
Output $ / M tokens—$25
Results tracked868

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

Category by category

Coding Not comparable

Claude 2: —, Claude Opus 4.6: 57.2 (#20)

BenchmarkClaude 2Claude Opus 4.6
SWE-bench Verified—78.7%
FrontierCode—26.6%
SWE-bench Verified (bash only)—75.6%
LMArena WebDev—1547
SWE-bench Multilingual—72%
GSO—41.2%
WeirdML—78%
LMArena Coding—1536
ALE-Bench—996.5
AlgoTune—1.47
HumanEval+61.6%—

Agentic & Tool Use Not comparable

Claude 2: —, Claude Opus 4.6: 51.1 (#4)

BenchmarkClaude 2Claude Opus 4.6
Terminal-Bench—79.8%
APEX-Agents—46.3%
Remote Labor Index—4.2%
τ²-bench Banking—27.3%
Cybench—93%
DeepResearch Bench—55.3%
GBAEval—44.1%
LMArena Search—1253
METR Time Horizons—78.9%
Vending-Bench 2—8,018

Reasoning Claude Opus 4.6 leads

Claude 2: 21.7 (#216), Claude Opus 4.6: 57.8 (#23)

BenchmarkClaude 2Claude Opus 4.6
DTBench51.9%91.2%
Epoch Capabilities Index120.13155.24
ARC-AGI-2—69.2%
SimpleBench—67.6%
Kagi LLM Benchmark—83.6%
NYT Connections (extended)—92.1%
ARC-AGI-1—94%
Chess Puzzles—17%
EnigmaEval—7.6%
Thematic Generalization—80.6%
EBR-Bench—12.7%
LMArena Hard Prompts—1527
Mystery Game Puzzles—25%
LMCA—55.8%
ForecastBench—60

Math Claude Opus 4.6 leads

Claude 2: 9.3 (#320), Claude Opus 4.6: 63.0 (#31)

BenchmarkClaude 2Claude Opus 4.6
OTIS Mock AIME 2024-20252.5%94.4%
FrontierMath (Tiers 1-3)—66%
FrontierMath Tier 4—26.8%
MathArena Final-Answer Competitions—78.5%
ProofBench—50%
LMArena Math—1519
MATH Level 511.7%—
FrontierMath (Feb 2025 set)—40.7%
FrontierMath Tier 4 (v1)—22.9%

Knowledge Claude Opus 4.6 leads

Claude 2: 16.9 (#287), Claude Opus 4.6: 61.9 (#26)

BenchmarkClaude 2Claude Opus 4.6
GPQA Diamond34.7%90.5%
Humanity's Last Exam—34.4%
SimpleQA Verified—47%
Vectara Hallucination Rate—12.2%
LMArena Expert—1546
MMLU78.5%—
TriviaQA87.5%—

Multimodal Not comparable

Claude 2: —, Claude Opus 4.6: 37.3 (#74)

BenchmarkClaude 2Claude Opus 4.6
LMArena Vision—1316
Furniture Assembly—28.3%
LMArena Document—1507

Multilingual Not comparable

Claude 2: —, Claude Opus 4.6: 57.9 (#6)

BenchmarkClaude 2Claude Opus 4.6
LMArena Non-English—1489
LMArena Chinese—1551
LMArena French—1513
LMArena German—1502
LMArena Japanese—1484
LMArena Korean—1464
LMArena Russian—1497
LMArena Spanish—1510

Instruction Following Not comparable

Claude 2: —, Claude Opus 4.6: 79.5 (#4)

BenchmarkClaude 2Claude Opus 4.6
LMArena Instruction Following—1523

Long Context Not comparable

Claude 2: —, Claude Opus 4.6: 48.1 (#13)

BenchmarkClaude 2Claude Opus 4.6
CL-bench—20.7%
CL-bench Life—17%
LMArena Longer Query—1520

Writing & Preference Not comparable

Claude 2: —, Claude Opus 4.6: 73.5 (#10)

BenchmarkClaude 2Claude Opus 4.6
LMArena Text—1503
LMArena Creative Writing—1505
EQ-Bench Creative Writing—1809
EQ-Bench 4—1223
LMArena Multi-Turn—1513

Frequently asked questions

Is Claude 2 better than Claude Opus 4.6?

Claude Opus 4.6 is the stronger model overall, scoring 58.2 to 25.0 on the Noometry Index.

How many benchmarks do Claude 2 and Claude Opus 4.6 share?

4 benchmarks have published results for both models. Claude 2 has 8 scored results on Noometry and Claude Opus 4.6 has 68.

Related comparisons

Go deeper