Noometry

Model comparison

Claude Opus 5.5 vs DeepSeek LLM 67B

Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 24.9 on the Noometry Index.

Last verified . 13 shared benchmarks.

Claude Opus 5.5 Anthropic

68.6

Rank #3 Confirmed

DeepSeek LLM 67B DeepSeek

24.9

Rank #347 Confirmed

Summary

  • They share 13 benchmarks with published results for both. Claude Opus 5.5 scores higher in 8 categories and DeepSeek LLM 67B 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 8.7.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 100% for Claude Opus 5.5 and 0.8% for DeepSeek LLM 67B.
  • DeepSeek LLM 67B has downloadable open weights; the other is API-only.

Side by side

Claude Opus 5.5DeepSeek LLM 67B
ProviderAnthropicDeepSeek
Noometry Index68.624.9
Released2026-09-222023-11-29
WeightsProprietaryOpen
Context window1M—
Max output128K—
Input $ / M tokens$4—
Output $ / M tokens$20—
Results tracked4415

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Category by category

Coding Claude Opus 5.5 leads

Claude Opus 5.5: 71.9 (#3), DeepSeek LLM 67B: 31.9 (#278)

BenchmarkClaude Opus 5.5DeepSeek LLM 67B
LMArena Coding15471096
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), DeepSeek LLM 67B: —

BenchmarkClaude Opus 5.5DeepSeek LLM 67B
APEX-Agents73.5%—
GDP.pdf30.6%—
Vending-Bench 29,235—

Reasoning Claude Opus 5.5 leads

Claude Opus 5.5: 80.2 (#3), DeepSeek LLM 67B: 16.5 (#304)

BenchmarkClaude Opus 5.5DeepSeek LLM 67B
LMArena Hard Prompts15351070
Epoch Capabilities Index167.33110.5
ARC-AGI-293.3%—
NYT Connections (extended)88.5%—
ARC-AGI-198.5%—
CritPt31.7%—
Chess Puzzles—0%
EBR-Bench71.4%—
Mystery Game Puzzles71%—
DTBench98.9%—
LMCA68.2%—

Math Claude Opus 5.5 leads

Claude Opus 5.5: 91.8 (#3), DeepSeek LLM 67B: 8.7 (#324)

BenchmarkClaude Opus 5.5DeepSeek LLM 67B
OTIS Mock AIME 2024-2025100%0.8%
LMArena Math15061108
FrontierMath (Tiers 1-3)91.2%—
FrontierMath Tier 495%—
ProofBench100%—
MATH Level 5—6.4%
FrontierMath Erdős2.9%—

Knowledge Claude Opus 5.5 leads

Claude Opus 5.5: 66.4 (#10), DeepSeek LLM 67B: 7.0 (#313)

BenchmarkClaude Opus 5.5DeepSeek LLM 67B
GPQA Diamond90.6%24.6%
SimpleQA Verified72.2%—
LMArena Expert1547—

Multimodal Not comparable

Claude Opus 5.5: 57.8 (#1), DeepSeek LLM 67B: —

BenchmarkClaude Opus 5.5DeepSeek LLM 67B
LMArena Vision1321—
Blueprint-Bench 251.2%—
Furniture Assembly83.3%—

Multilingual Claude Opus 5.5 leads

Claude Opus 5.5: 59.1 (#2), DeepSeek LLM 67B: 29.4 (#267)

BenchmarkClaude Opus 5.5DeepSeek LLM 67B
LMArena Non-English15071073
LMArena Chinese15881132
LMArena French1514—
LMArena Russian1520—
LMArena Spanish1507—

Instruction Following Claude Opus 5.5 leads

Claude Opus 5.5: 80.0 (#3), DeepSeek LLM 67B: 55.4 (#277)

BenchmarkClaude Opus 5.5DeepSeek LLM 67B
LMArena Instruction Following15371079

Long Context Claude Opus 5.5 leads

Claude Opus 5.5: 47.1 (#19), DeepSeek LLM 67B: 33.1 (#265)

BenchmarkClaude Opus 5.5DeepSeek LLM 67B
LMArena Longer Query15321092

Writing & Preference Claude Opus 5.5 leads

Claude Opus 5.5: 78.2 (#3), DeepSeek LLM 67B: 31.6 (#282)

BenchmarkClaude Opus 5.5DeepSeek LLM 67B
LMArena Text15151105
LMArena Creative Writing15331067
LMArena Multi-Turn14991082
EQ-Bench Creative Writing2050—

Frequently asked questions

Is Claude Opus 5.5 better than DeepSeek LLM 67B?

Claude Opus 5.5 is the stronger model overall, scoring 68.6 to 24.9 on the Noometry Index.

Is Claude Opus 5.5 or DeepSeek LLM 67B better for coding?

Claude Opus 5.5 scores higher on coding benchmarks: 71.9 versus 31.9 in the Noometry coding category.

How many benchmarks do Claude Opus 5.5 and DeepSeek LLM 67B share?

13 benchmarks have published results for both models. Claude Opus 5.5 has 44 scored results on Noometry and DeepSeek LLM 67B has 15.

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