Noometry

Model comparison

Claude Opus 5.5 vs DeepSeek Coder 1.3B

Claude Opus 5.5 has enough public results to be ranked (#3); DeepSeek Coder 1.3B does not yet, so treat this comparison as directional.

Last verified . 1 shared benchmarks.

Claude Opus 5.5 Anthropic

68.6

Rank #3 Confirmed

DeepSeek Coder 1.3B DeepSeek

35.0

Unranked Sparse

Summary

  • They share 1 benchmark with published results for both. Claude Opus 5.5 scores higher in 1 category and DeepSeek Coder 1.3B in 0 categories; one gap is clear of the uncertainty.
  • The widest gap is in coding, where Claude Opus 5.5 leads 71.9 to 31.2.
  • DeepSeek Coder 1.3B has downloadable open weights; the other is API-only.

Side by side

Claude Opus 5.5DeepSeek Coder 1.3B
ProviderAnthropicDeepSeek
Noometry Index68.635.0
Released2026-09-222023-11-02
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), DeepSeek Coder 1.3B: 31.2 (#287)

BenchmarkClaude Opus 5.5DeepSeek Coder 1.3B
FrontierCode54.6%—
CursorBench57.8%—
LMArena WebDev1813—
FrontierSWE62.3%—
SciCode66.9%—
BigCodeBench Instruct—22.8%
LMArena Coding1547—
MirrorCode77.4%—
BigCodeBench Complete—29.6%
ALE-Bench2,147—
HumanEval+—60.4%
MBPP+—54.8%

Agentic & Tool Use Not comparable

Claude Opus 5.5: 45.3 (#15), DeepSeek Coder 1.3B: —

BenchmarkClaude Opus 5.5DeepSeek Coder 1.3B
APEX-Agents73.5%—
GDP.pdf30.6%—
Vending-Bench 29,235—

Reasoning Not comparable

Claude Opus 5.5: 80.2 (#3), DeepSeek Coder 1.3B: —

BenchmarkClaude Opus 5.5DeepSeek Coder 1.3B
Epoch Capabilities Index167.3363.6
ARC-AGI-293.3%—
NYT Connections (extended)88.5%—
ARC-AGI-198.5%—
CritPt31.7%—
EBR-Bench71.4%—
LMArena Hard Prompts1535—
Mystery Game Puzzles71%—
DTBench98.9%—
LMCA68.2%—
WinoGrande—53.3%

Math Not comparable

Claude Opus 5.5: 91.8 (#3), DeepSeek Coder 1.3B: —

BenchmarkClaude Opus 5.5DeepSeek Coder 1.3B
FrontierMath (Tiers 1-3)91.2%—
FrontierMath Tier 495%—
OTIS Mock AIME 2024-2025100%—
ProofBench100%—
LMArena Math1506—
FrontierMath Erdős2.9%—
GSM8K—4.4%

Knowledge Not comparable

Claude Opus 5.5: 66.4 (#10), DeepSeek Coder 1.3B: —

BenchmarkClaude Opus 5.5DeepSeek Coder 1.3B
GPQA Diamond90.6%—
SimpleQA Verified72.2%—
LMArena Expert1547—
ARC (AI2) Challenge—25.4%
MMLU—25.8%

Multimodal Not comparable

Claude Opus 5.5: 57.8 (#1), DeepSeek Coder 1.3B: —

BenchmarkClaude Opus 5.5DeepSeek Coder 1.3B
LMArena Vision1321—
Blueprint-Bench 251.2%—
Furniture Assembly83.3%—

Multilingual Not comparable

Claude Opus 5.5: 59.1 (#2), DeepSeek Coder 1.3B: —

BenchmarkClaude Opus 5.5DeepSeek Coder 1.3B
LMArena Non-English1507—
LMArena Chinese1588—
LMArena French1514—
LMArena Russian1520—
LMArena Spanish1507—

Instruction Following Not comparable

Claude Opus 5.5: 80.0 (#3), DeepSeek Coder 1.3B: —

BenchmarkClaude Opus 5.5DeepSeek Coder 1.3B
LMArena Instruction Following1537—

Long Context Not comparable

Claude Opus 5.5: 47.1 (#19), DeepSeek Coder 1.3B: —

BenchmarkClaude Opus 5.5DeepSeek Coder 1.3B
LMArena Longer Query1532—

Writing & Preference Not comparable

Claude Opus 5.5: 78.2 (#3), DeepSeek Coder 1.3B: —

BenchmarkClaude Opus 5.5DeepSeek Coder 1.3B
LMArena Text1515—
LMArena Creative Writing1533—
EQ-Bench Creative Writing2050—
LMArena Multi-Turn1499—

Frequently asked questions

Is Claude Opus 5.5 better than DeepSeek Coder 1.3B?

Claude Opus 5.5 has enough public results to be ranked (#3); DeepSeek Coder 1.3B does not yet, so treat this comparison as directional.

Is Claude Opus 5.5 or DeepSeek Coder 1.3B better for coding?

Claude Opus 5.5 scores higher on coding benchmarks: 71.9 versus 31.2 in the Noometry coding category.

How many benchmarks do Claude Opus 5.5 and DeepSeek Coder 1.3B share?

1 benchmark has published results for both models. Claude Opus 5.5 has 44 scored results on Noometry and DeepSeek Coder 1.3B has 9.

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