Noometry

Model comparison

Claude Opus 5.5 vs Llama 3-70B

Claude Opus 5.5 is the stronger model overall, scoring 68.5 to 28.5 on the Noometry Index.

Last verified . 14 shared benchmarks.

Claude Opus 5.5 Anthropic

68.5

Rank #3 Confirmed

Llama 3-70B Meta

28.5

Rank #317 Confirmed

Summary

  • They share 14 benchmarks with published results for both. Claude Opus 5.5 scores higher in 9 categories and Llama 3-70B in 0 categories; 9 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Opus 5.5 leads 92.4 to 12.0.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 100% for Claude Opus 5.5 and 4.3% for Llama 3-70B.
  • Llama 3-70B has downloadable open weights; the other is API-only.

Side by side

Claude Opus 5.5Llama 3-70B
ProviderAnthropicMeta
Noometry Index68.528.5
Released2026-09-222024-04-18
WeightsProprietaryOpen
Context window1M—
Max output128K—
Input $ / M tokens$4—
Output $ / M tokens$20—
Results tracked3531

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Category by category

Coding Claude Opus 5.5 leads

Claude Opus 5.5: 71.4 (#1), Llama 3-70B: 35.3 (#215)

BenchmarkClaude Opus 5.5Llama 3-70B
LMArena Coding15451206
FrontierCode54.4%—
CursorBench57.8%—
LMArena WebDev1820—
FrontierSWE62.3%—
SciCode66.9%—
BigCodeBench Instruct—43.6%
MirrorCode77.4%—
BigCodeBench Complete—54.5%
HumanEval+—72%
MBPP+—69%

Agentic & Tool Use Claude Opus 5.5 leads

Claude Opus 5.5: 45.3 (#13), Llama 3-70B: 20.9 (#132)

BenchmarkClaude Opus 5.5Llama 3-70B
APEX-Agents73.5%—
Cybench—5%
GDP.pdf30.6%—

Reasoning Claude Opus 5.5 leads

Claude Opus 5.5: 79.5 (#2), Llama 3-70B: 17.4 (#284)

BenchmarkClaude Opus 5.5Llama 3-70B
LMArena Hard Prompts15451195
DTBench98.9%54.2%
ARC-AGI-292.5%—
Kagi LLM Benchmark—35.1%
NYT Connections (extended)88.5%—
ARC-AGI-197.5%—
CritPt31.7%—
EBR-Bench71.4%—
Mystery Game Puzzles71%—
LMCA68.2%—
Epoch Capabilities Index—122.91
ForecastBench—57.1
WinoGrande—83.5%

Math Claude Opus 5.5 leads

Claude Opus 5.5: 92.4 (#2), Llama 3-70B: 12.0 (#299)

BenchmarkClaude Opus 5.5Llama 3-70B
OTIS Mock AIME 2024-2025100%4.3%
FrontierMath (Tiers 1-3)91.2%—
FrontierMath Tier 495%—
ProofBench100%—
LMArena Math—1218
MATH Level 5—22.6%

Knowledge Claude Opus 5.5 leads

Claude Opus 5.5: 66.6 (#9), Llama 3-70B: 20.8 (#272)

BenchmarkClaude Opus 5.5Llama 3-70B
GPQA Diamond90.6%40.6%
LMArena Expert15641149
SimpleQA Verified72.2%—
MMLU—79.3%

Multimodal Not comparable

Claude Opus 5.5: 56.5 (#2), Llama 3-70B: —

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

Multilingual Claude Opus 5.5 leads

Claude Opus 5.5: 59.8 (#1), Llama 3-70B: 33.8 (#246)

BenchmarkClaude Opus 5.5Llama 3-70B
LMArena Non-English15131142
LMArena Chinese15721114
LMArena Russian15321159
LMArena French—1231
LMArena German—1169
LMArena Japanese—1017
LMArena Korean—1017
LMArena Spanish—1241

Instruction Following Claude Opus 5.5 leads

Claude Opus 5.5: 80.1 (#2), Llama 3-70B: 62.8 (#233)

BenchmarkClaude Opus 5.5Llama 3-70B
LMArena Instruction Following15351194

Long Context Claude Opus 5.5 leads

Claude Opus 5.5: 47.3 (#18), Llama 3-70B: 35.6 (#235)

BenchmarkClaude Opus 5.5Llama 3-70B
LMArena Longer Query15401174

Writing & Preference Claude Opus 5.5 leads

Claude Opus 5.5: 78.7 (#3), Llama 3-70B: 43.0 (#225)

BenchmarkClaude Opus 5.5Llama 3-70B
LMArena Text15181221
LMArena Creative Writing15381210
LMArena Multi-Turn15201223
EQ-Bench Creative Writing2050—

Frequently asked questions

Is Claude Opus 5.5 better than Llama 3-70B?

Claude Opus 5.5 is the stronger model overall, scoring 68.5 to 28.5 on the Noometry Index.

Is Claude Opus 5.5 or Llama 3-70B better for coding?

Claude Opus 5.5 scores higher on coding benchmarks: 71.4 versus 35.3 in the Noometry coding category.

How many benchmarks do Claude Opus 5.5 and Llama 3-70B share?

14 benchmarks have published results for both models. Claude Opus 5.5 has 35 scored results on Noometry and Llama 3-70B has 31.

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