Noometry

Model comparison

Claude Opus 5.5 vs Eurus-2-7B-PRIME

Claude Opus 5.5 has enough public results to be ranked (#3); Eurus-2-7B-PRIME does not yet, so treat this comparison as directional.

Last verified . 1 shared benchmarks.

Claude Opus 5.5 Anthropic

68.6

Rank #3 Confirmed

Eurus-2-7B-PRIME Shanghai AI Lab

26.7

Unranked Sparse

Summary

  • They share 1 benchmark with published results for both. Claude Opus 5.5 scores higher in 1 category and Eurus-2-7B-PRIME in 0 categories; one gap is clear of the uncertainty.
  • The widest gap is in knowledge, where Claude Opus 5.5 leads 66.4 to 16.3.
  • The biggest single-benchmark swing is GPQA Diamond: 90.6% for Claude Opus 5.5 and 33.9% for Eurus-2-7B-PRIME.
  • Eurus-2-7B-PRIME has downloadable open weights; the other is API-only.

Side by side

Claude Opus 5.5Eurus-2-7B-PRIME
ProviderAnthropicShanghai AI Lab
Noometry Index68.626.7
Released2026-09-222024-12-31
WeightsProprietaryOpen
Context window1M—
Max output128K—
Input $ / M tokens$4—
Output $ / M tokens$20—
Results tracked441

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Category by category

Coding Not comparable

Claude Opus 5.5: 71.9 (#3), Eurus-2-7B-PRIME: —

BenchmarkClaude Opus 5.5Eurus-2-7B-PRIME
FrontierCode54.6%—
CursorBench57.8%—
LMArena WebDev1813—
FrontierSWE62.3%—
SciCode66.9%—
LMArena Coding1547—
MirrorCode77.4%—
ALE-Bench2,147—

Agentic & Tool Use Not comparable

Claude Opus 5.5: 45.3 (#15), Eurus-2-7B-PRIME: —

BenchmarkClaude Opus 5.5Eurus-2-7B-PRIME
APEX-Agents73.5%—
GDP.pdf30.6%—
Vending-Bench 29,235—

Reasoning Not comparable

Claude Opus 5.5: 80.2 (#3), Eurus-2-7B-PRIME: —

BenchmarkClaude Opus 5.5Eurus-2-7B-PRIME
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%—
Epoch Capabilities Index167.33—

Math Not comparable

Claude Opus 5.5: 91.8 (#3), Eurus-2-7B-PRIME: —

BenchmarkClaude Opus 5.5Eurus-2-7B-PRIME
FrontierMath (Tiers 1-3)91.2%—
FrontierMath Tier 495%—
OTIS Mock AIME 2024-2025100%—
ProofBench100%—
LMArena Math1506—
FrontierMath Erdős2.9%—

Knowledge Claude Opus 5.5 leads

Claude Opus 5.5: 66.4 (#10), Eurus-2-7B-PRIME: 16.3

BenchmarkClaude Opus 5.5Eurus-2-7B-PRIME
GPQA Diamond90.6%33.9%
SimpleQA Verified72.2%—
LMArena Expert1547—

Multimodal Not comparable

Claude Opus 5.5: 57.8 (#1), Eurus-2-7B-PRIME: —

BenchmarkClaude Opus 5.5Eurus-2-7B-PRIME
LMArena Vision1321—
Blueprint-Bench 251.2%—
Furniture Assembly83.3%—

Multilingual Not comparable

Claude Opus 5.5: 59.1 (#2), Eurus-2-7B-PRIME: —

BenchmarkClaude Opus 5.5Eurus-2-7B-PRIME
LMArena Non-English1507—
LMArena Chinese1588—
LMArena French1514—
LMArena Russian1520—
LMArena Spanish1507—

Instruction Following Not comparable

Claude Opus 5.5: 80.0 (#3), Eurus-2-7B-PRIME: —

BenchmarkClaude Opus 5.5Eurus-2-7B-PRIME
LMArena Instruction Following1537—

Long Context Not comparable

Claude Opus 5.5: 47.1 (#19), Eurus-2-7B-PRIME: —

BenchmarkClaude Opus 5.5Eurus-2-7B-PRIME
LMArena Longer Query1532—

Writing & Preference Not comparable

Claude Opus 5.5: 78.2 (#3), Eurus-2-7B-PRIME: —

BenchmarkClaude Opus 5.5Eurus-2-7B-PRIME
LMArena Text1515—
LMArena Creative Writing1533—
EQ-Bench Creative Writing2050—
LMArena Multi-Turn1499—

Frequently asked questions

Is Claude Opus 5.5 better than Eurus-2-7B-PRIME?

Claude Opus 5.5 has enough public results to be ranked (#3); Eurus-2-7B-PRIME does not yet, so treat this comparison as directional.

How many benchmarks do Claude Opus 5.5 and Eurus-2-7B-PRIME share?

1 benchmark has published results for both models. Claude Opus 5.5 has 44 scored results on Noometry and Eurus-2-7B-PRIME has 1.

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