Noometry

Model comparison

Claude Opus 5.5 vs Llama2 70b Steerlm Chat

Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 31.8 on the Noometry Index.

Last verified . 9 shared benchmarks.

Claude Opus 5.5 Anthropic

68.6

Rank #3 Confirmed

Llama2 70b Steerlm Chat NVIDIA

31.8

Rank #268 Confirmed

Summary

  • They share 9 benchmarks with published results for both. Claude Opus 5.5 scores higher in 7 categories and Llama2 70b Steerlm Chat in 0 categories; 7 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Opus 5.5 leads 91.8 to 31.3.
  • Llama2 70b Steerlm Chat has downloadable open weights; the other is API-only.

Side by side

Claude Opus 5.5Llama2 70b Steerlm Chat
ProviderAnthropicNVIDIA
Noometry Index68.631.8
Released2026-09-22—
WeightsProprietaryOpen
Context window1M—
Max output128K—
Input $ / M tokens$4—
Output $ / M tokens$20—
Results tracked449

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Category by category

Coding Claude Opus 5.5 leads

Claude Opus 5.5: 71.9 (#3), Llama2 70b Steerlm Chat: 29.9 (#300)

BenchmarkClaude Opus 5.5Llama2 70b Steerlm Chat
LMArena Coding15471025
FrontierCode54.6%—
CursorBench57.8%—
LMArena WebDev1813—
FrontierSWE62.3%—
SciCode66.9%—
MirrorCode77.4%—
ALE-Bench2,147—

Agentic & Tool Use Not comparable

Claude Opus 5.5: 45.3 (#15), Llama2 70b Steerlm Chat: —

BenchmarkClaude Opus 5.5Llama2 70b Steerlm Chat
APEX-Agents73.5%—
GDP.pdf30.6%—
Vending-Bench 29,235—

Reasoning Claude Opus 5.5 leads

Claude Opus 5.5: 80.2 (#3), Llama2 70b Steerlm Chat: 20.0 (#246)

BenchmarkClaude Opus 5.5Llama2 70b Steerlm Chat
LMArena Hard Prompts15351047
ARC-AGI-293.3%—
NYT Connections (extended)88.5%—
ARC-AGI-198.5%—
CritPt31.7%—
EBR-Bench71.4%—
Mystery Game Puzzles71%—
DTBench98.9%—
LMCA68.2%—
Epoch Capabilities Index167.33—

Math Claude Opus 5.5 leads

Claude Opus 5.5: 91.8 (#3), Llama2 70b Steerlm Chat: 31.3 (#226)

BenchmarkClaude Opus 5.5Llama2 70b Steerlm Chat
LMArena Math15061072
FrontierMath (Tiers 1-3)91.2%—
FrontierMath Tier 495%—
OTIS Mock AIME 2024-2025100%—
ProofBench100%—
FrontierMath Erdős2.9%—

Knowledge Not comparable

Claude Opus 5.5: 66.4 (#10), Llama2 70b Steerlm Chat: —

BenchmarkClaude Opus 5.5Llama2 70b Steerlm Chat
GPQA Diamond90.6%—
SimpleQA Verified72.2%—
LMArena Expert1547—

Multimodal Not comparable

Claude Opus 5.5: 57.8 (#1), Llama2 70b Steerlm Chat: —

BenchmarkClaude Opus 5.5Llama2 70b Steerlm Chat
LMArena Vision1321—
Blueprint-Bench 251.2%—
Furniture Assembly83.3%—

Multilingual Claude Opus 5.5 leads

Claude Opus 5.5: 59.1 (#2), Llama2 70b Steerlm Chat: 28.8 (#270)

BenchmarkClaude Opus 5.5Llama2 70b Steerlm Chat
LMArena Non-English15071063
LMArena Chinese1588—
LMArena French1514—
LMArena Russian1520—
LMArena Spanish1507—

Instruction Following Claude Opus 5.5 leads

Claude Opus 5.5: 80.0 (#3), Llama2 70b Steerlm Chat: 54.2 (#279)

BenchmarkClaude Opus 5.5Llama2 70b Steerlm Chat
LMArena Instruction Following15371060

Long Context Claude Opus 5.5 leads

Claude Opus 5.5: 47.1 (#19), Llama2 70b Steerlm Chat: 30.4 (#288)

BenchmarkClaude Opus 5.5Llama2 70b Steerlm Chat
LMArena Longer Query1532998

Writing & Preference Claude Opus 5.5 leads

Claude Opus 5.5: 78.2 (#3), Llama2 70b Steerlm Chat: 31.6 (#283)

BenchmarkClaude Opus 5.5Llama2 70b Steerlm Chat
LMArena Text15151098
LMArena Creative Writing15331091
LMArena Multi-Turn14991058
EQ-Bench Creative Writing2050—

Frequently asked questions

Is Claude Opus 5.5 better than Llama2 70b Steerlm Chat?

Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 31.8 on the Noometry Index.

Is Claude Opus 5.5 or Llama2 70b Steerlm Chat better for coding?

Claude Opus 5.5 scores higher on coding benchmarks: 71.9 versus 29.9 in the Noometry coding category.

How many benchmarks do Claude Opus 5.5 and Llama2 70b Steerlm Chat share?

9 benchmarks have published results for both models. Claude Opus 5.5 has 44 scored results on Noometry and Llama2 70b Steerlm Chat has 9.

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