Noometry

Model comparison

Claude Opus 5.5 vs Llama 3-8B

Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 25.5 on the Noometry Index.

Last verified . 18 shared benchmarks.

Claude Opus 5.5 Anthropic

68.6

Rank #3 Confirmed

Llama 3-8B Meta

25.5

Rank #344 Confirmed

Summary

  • They share 18 benchmarks with published results for both. Claude Opus 5.5 scores higher in 8 categories and Llama 3-8B in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Opus 5.5 leads 91.8 to 8.8.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 100% for Claude Opus 5.5 and 1.9% for Llama 3-8B.
  • Llama 3-8B has downloadable open weights; the other is API-only.

Side by side

Claude Opus 5.5Llama 3-8B
ProviderAnthropicMeta
Noometry Index68.625.5
Released2026-09-222024-04-18
WeightsProprietaryOpen
Context window1M—
Max output128K—
Input $ / M tokens$4—
Output $ / M tokens$20—
Results tracked4434

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Category by category

Coding Claude Opus 5.5 leads

Claude Opus 5.5: 71.9 (#3), Llama 3-8B: 31.0 (#289)

BenchmarkClaude Opus 5.5Llama 3-8B
LMArena Coding15471152
FrontierCode54.6%—
CursorBench57.8%—
LMArena WebDev1813—
FrontierSWE62.3%—
SciCode66.9%—
BigCodeBench Instruct—31.9%
MirrorCode77.4%—
BigCodeBench Complete—36.9%
ALE-Bench2,147—
HumanEval+—56.7%
MBPP+—54.8%

Agentic & Tool Use Not comparable

Claude Opus 5.5: 45.3 (#15), Llama 3-8B: —

BenchmarkClaude Opus 5.5Llama 3-8B
APEX-Agents73.5%—
GDP.pdf30.6%—
Vending-Bench 29,235—

Reasoning Claude Opus 5.5 leads

Claude Opus 5.5: 80.2 (#3), Llama 3-8B: 14.3 (#326)

BenchmarkClaude Opus 5.5Llama 3-8B
LMArena Hard Prompts15351133
DTBench98.9%43.9%
Epoch Capabilities Index167.33116.45
ARC-AGI-293.3%—
NYT Connections (extended)88.5%—
ARC-AGI-198.5%—
CritPt31.7%—
Chess Puzzles—0%
EBR-Bench71.4%—
Mystery Game Puzzles71%—
LMCA68.2%—
Adversarial NLI—57.3%
ForecastBench—58.6
WinoGrande—75.7%

Math Claude Opus 5.5 leads

Claude Opus 5.5: 91.8 (#3), Llama 3-8B: 8.8 (#323)

BenchmarkClaude Opus 5.5Llama 3-8B
OTIS Mock AIME 2024-2025100%1.9%
LMArena Math15061151
FrontierMath (Tiers 1-3)91.2%—
FrontierMath Tier 495%—
ProofBench100%—
MATH Level 5—6.1%
FrontierMath Erdős2.9%—

Knowledge Claude Opus 5.5 leads

Claude Opus 5.5: 66.4 (#10), Llama 3-8B: 7.8 (#308)

BenchmarkClaude Opus 5.5Llama 3-8B
GPQA Diamond90.6%26.1%
LMArena Expert15471113
SimpleQA Verified72.2%—
ARC (AI2) Challenge—82.8%
MMLU—68.8%
OpenBookQA—82.6%
TriviaQA—67.7%

Multimodal Not comparable

Claude Opus 5.5: 57.8 (#1), Llama 3-8B: —

BenchmarkClaude Opus 5.5Llama 3-8B
LMArena Vision1321—
Blueprint-Bench 251.2%—
Furniture Assembly83.3%—

Multilingual Claude Opus 5.5 leads

Claude Opus 5.5: 59.1 (#2), Llama 3-8B: 30.8 (#261)

BenchmarkClaude Opus 5.5Llama 3-8B
LMArena Non-English15071098
LMArena Chinese15881076
LMArena French15141159
LMArena Russian15201109
LMArena Spanish15071173
LMArena German—1104
LMArena Japanese—967
LMArena Korean—1004

Instruction Following Claude Opus 5.5 leads

Claude Opus 5.5: 80.0 (#3), Llama 3-8B: 58.4 (#260)

BenchmarkClaude Opus 5.5Llama 3-8B
LMArena Instruction Following15371127

Long Context Claude Opus 5.5 leads

Claude Opus 5.5: 47.1 (#19), Llama 3-8B: 34.2 (#251)

BenchmarkClaude Opus 5.5Llama 3-8B
LMArena Longer Query15321128

Writing & Preference Claude Opus 5.5 leads

Claude Opus 5.5: 78.2 (#3), Llama 3-8B: 37.5 (#256)

BenchmarkClaude Opus 5.5Llama 3-8B
LMArena Text15151166
LMArena Creative Writing15331150
LMArena Multi-Turn14991152
EQ-Bench Creative Writing2050—

Frequently asked questions

Is Claude Opus 5.5 better than Llama 3-8B?

Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 25.5 on the Noometry Index.

Is Claude Opus 5.5 or Llama 3-8B better for coding?

Claude Opus 5.5 scores higher on coding benchmarks: 71.9 versus 31.0 in the Noometry coding category.

How many benchmarks do Claude Opus 5.5 and Llama 3-8B share?

18 benchmarks have published results for both models. Claude Opus 5.5 has 44 scored results on Noometry and Llama 3-8B has 34.

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