Noometry

Model comparison

Claude Opus 5.5 vs Llama 2-70B

Claude Opus 5.5 is the stronger model overall, scoring 68.5 to 24.1 on the Noometry Index.

Last verified . 14 shared benchmarks.

Claude Opus 5.5 Anthropic

68.5

Rank #3 Confirmed

Llama 2-70B Meta

24.1

Rank #343 Confirmed

Summary

  • They share 14 benchmarks with published results for both. Claude Opus 5.5 scores higher in 8 categories and Llama 2-70B in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Opus 5.5 leads 92.4 to 7.5.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 100% for Claude Opus 5.5 and 0% for Llama 2-70B.
  • Llama 2-70B has downloadable open weights; the other is API-only.

Side by side

Claude Opus 5.5Llama 2-70B
ProviderAnthropicMeta
Noometry Index68.524.1
Released2026-09-222023-07-18
WeightsProprietaryOpen
Context window1M—
Max output128K—
Input $ / M tokens$4—
Output $ / M tokens$20—
Results tracked3535

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Category by category

Coding Claude Opus 5.5 leads

Claude Opus 5.5: 71.4 (#1), Llama 2-70B: 30.8 (#281)

BenchmarkClaude Opus 5.5Llama 2-70B
LMArena Coding15451079
FrontierCode54.4%—
CursorBench57.8%—
LMArena WebDev1820—
FrontierSWE62.3%—
SciCode66.9%—
MirrorCode77.4%—

Agentic & Tool Use Not comparable

Claude Opus 5.5: 45.3 (#13), Llama 2-70B: —

BenchmarkClaude Opus 5.5Llama 2-70B
APEX-Agents73.5%—
GDP.pdf30.6%—

Reasoning Claude Opus 5.5 leads

Claude Opus 5.5: 79.5 (#2), Llama 2-70B: 13.7 (#324)

BenchmarkClaude Opus 5.5Llama 2-70B
LMArena Hard Prompts15451073
DTBench98.9%41.6%
ARC-AGI-292.5%—
NYT Connections (extended)88.5%—
ARC-AGI-197.5%—
CritPt31.7%—
EBR-Bench71.4%—
Mystery Game Puzzles71%—
LMCA68.2%—
BIG-Bench Hard—64.9%
CommonsenseQA 2.0—50%
Epoch Capabilities Index—113.59
ForecastBench—51.4
HellaSwag—85.3%
LAMBADA—78.9%
PIQA—82.8%
WinoGrande—80.2%

Math Claude Opus 5.5 leads

Claude Opus 5.5: 92.4 (#2), Llama 2-70B: 7.5 (#320)

BenchmarkClaude Opus 5.5Llama 2-70B
OTIS Mock AIME 2024-2025100%0%
FrontierMath (Tiers 1-3)91.2%—
FrontierMath Tier 495%—
ProofBench100%—
LMArena Math—1091
MATH Level 5—3.3%
GSM8K—69.6%

Knowledge Claude Opus 5.5 leads

Claude Opus 5.5: 66.6 (#9), Llama 2-70B: 7.4 (#305)

BenchmarkClaude Opus 5.5Llama 2-70B
GPQA Diamond90.6%26.3%
LMArena Expert15641039
SimpleQA Verified72.2%—
ARC (AI2) Challenge—78.3%
BoolQ—88.6%
MMLU—69.9%
OpenBookQA—60.2%
TriviaQA—87.6%

Multimodal Not comparable

Claude Opus 5.5: 56.5 (#2), Llama 2-70B: —

BenchmarkClaude Opus 5.5Llama 2-70B
Furniture Assembly83.3%—

Multilingual Claude Opus 5.5 leads

Claude Opus 5.5: 59.8 (#1), Llama 2-70B: 27.9 (#269)

BenchmarkClaude Opus 5.5Llama 2-70B
LMArena Non-English15131045
LMArena Chinese1572994
LMArena Russian15321083
LMArena French—1089
LMArena German—1041
LMArena Japanese—927
LMArena Korean—964
LMArena Spanish—1142

Instruction Following Claude Opus 5.5 leads

Claude Opus 5.5: 80.1 (#2), Llama 2-70B: 55.1 (#273)

BenchmarkClaude Opus 5.5Llama 2-70B
LMArena Instruction Following15351071

Long Context Claude Opus 5.5 leads

Claude Opus 5.5: 47.3 (#18), Llama 2-70B: 32.2 (#265)

BenchmarkClaude Opus 5.5Llama 2-70B
LMArena Longer Query15401062

Writing & Preference Claude Opus 5.5 leads

Claude Opus 5.5: 78.7 (#3), Llama 2-70B: 32.5 (#274)

BenchmarkClaude Opus 5.5Llama 2-70B
LMArena Text15181115
LMArena Creative Writing15381075
LMArena Multi-Turn15201088
EQ-Bench Creative Writing2050—

Frequently asked questions

Is Claude Opus 5.5 better than Llama 2-70B?

Claude Opus 5.5 is the stronger model overall, scoring 68.5 to 24.1 on the Noometry Index.

Is Claude Opus 5.5 or Llama 2-70B better for coding?

Claude Opus 5.5 scores higher on coding benchmarks: 71.4 versus 30.8 in the Noometry coding category.

How many benchmarks do Claude Opus 5.5 and Llama 2-70B share?

14 benchmarks have published results for both models. Claude Opus 5.5 has 35 scored results on Noometry and Llama 2-70B has 35.

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