Noometry

Model comparison

Claude Opus 5 vs Longcat Flash Chat

Claude Opus 5 is the stronger model overall, scoring 67.7 to 41.5 on the Noometry Index.

Last verified . 18 shared benchmarks.

Claude Opus 5 Anthropic

67.7

Rank #4 Confirmed

Longcat Flash Chat Meituan

41.5

Rank #121 Confirmed

Summary

  • They share 18 benchmarks with published results for both. Claude Opus 5 scores higher in 8 categories and Longcat Flash Chat in 0 categories; 8 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Claude Opus 5 leads 77.1 to 18.3.
  • The biggest single-benchmark swing is NYT Connections (extended): 94.3% for Claude Opus 5 and 17.7% for Longcat Flash Chat.
  • Longcat Flash Chat has downloadable open weights; the other is API-only.

Side by side

Claude Opus 5Longcat Flash Chat
ProviderAnthropicMeituan
Noometry Index67.741.5
Released2026-07-24—
WeightsProprietaryOpen
Context window1M—
Max output128K—
Input $ / M tokens$5—
Output $ / M tokens$25—
Results tracked5719

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Category by category

Coding Claude Opus 5 leads

Claude Opus 5: 67.0 (#5), Longcat Flash Chat: 42.9 (#85)

BenchmarkClaude Opus 5Longcat Flash Chat
LMArena Coding15331471
DeepSWE73.6%—
FrontierCode53.4%—
CursorBench46.6%—
LMArena WebDev1694—
FrontierSWE52%—
SciCode56.4%—
WeirdML91.8%—
ALE-Bench2,165—

Agentic & Tool Use Not comparable

Claude Opus 5: 55.5 (#1), Longcat Flash Chat: —

BenchmarkClaude Opus 5Longcat Flash Chat
APEX-Agents65.8%—
OSWorld 2.031.4%—
τ²-bench Banking48.7%—
PostTrainBench35%—
BALROG63.4%—
GBAEval79.6%—
GDP.pdf24%—
Vending-Bench 211,182—

Reasoning Claude Opus 5 leads

Claude Opus 5: 77.1 (#3), Longcat Flash Chat: 18.3 (#267)

BenchmarkClaude Opus 5Longcat Flash Chat
NYT Connections (extended)94.3%17.7%
LMArena Hard Prompts15251440
ARC-AGI-290.4%—
SimpleBench80.6%—
Kagi LLM Benchmark—43.9%
ARC-AGI-197.5%—
CritPt29.1%—
Chess Puzzles42%—
EBR-Bench45.7%—
Mystery Game Puzzles59%—
DTBench97.9%—
LMCA64.5%—
Bench to the Future 30.12—
Epoch Capabilities Index162.67—

Math Claude Opus 5 leads

Claude Opus 5: 86.1 (#6), Longcat Flash Chat: 36.6 (#107)

BenchmarkClaude Opus 5Longcat Flash Chat
LMArena Math15331441
FrontierMath (Tiers 1-3)85.6%—
FrontierMath Tier 473.2%—
OTIS Mock AIME 2024-202598.9%—
ProofBench99%—

Knowledge Claude Opus 5 leads

Claude Opus 5: 66.8 (#8), Longcat Flash Chat: 40.0 (#111)

BenchmarkClaude Opus 5Longcat Flash Chat
LMArena Expert15581454
GPQA Diamond93.9%—
SimpleQA Verified59.9%—

Multimodal Not comparable

Claude Opus 5: 51.1 (#6), Longcat Flash Chat: —

BenchmarkClaude Opus 5Longcat Flash Chat
LMArena Vision1321—
Blueprint-Bench 230.4%—
Furniture Assembly60.8%—
LMArena Document1516—

Multilingual Claude Opus 5 leads

Claude Opus 5: 58.8 (#3), Longcat Flash Chat: 52.1 (#95)

BenchmarkClaude Opus 5Longcat Flash Chat
LMArena Non-English15001404
LMArena Chinese15751465
LMArena French15221457
LMArena German15221409
LMArena Japanese15101373
LMArena Korean15261372
LMArena Russian15071396
LMArena Spanish15191445

Instruction Following Claude Opus 5 leads

Claude Opus 5: 79.3 (#5), Longcat Flash Chat: 74.6 (#92)

BenchmarkClaude Opus 5Longcat Flash Chat
LMArena Instruction Following15161411

Long Context Claude Opus 5 leads

Claude Opus 5: 46.5 (#20), Longcat Flash Chat: 43.5 (#89)

BenchmarkClaude Opus 5Longcat Flash Chat
LMArena Longer Query15161425

Writing & Preference Claude Opus 5 leads

Claude Opus 5: 79.3 (#2), Longcat Flash Chat: 61.2 (#88)

BenchmarkClaude Opus 5Longcat Flash Chat
LMArena Text15061427
LMArena Creative Writing14911388
LMArena Multi-Turn14961418
EQ-Bench Creative Writing2133—
EQ-Bench 41385—

Frequently asked questions

Is Claude Opus 5 better than Longcat Flash Chat?

Claude Opus 5 is the stronger model overall, scoring 67.7 to 41.5 on the Noometry Index.

Is Claude Opus 5 or Longcat Flash Chat better for coding?

Claude Opus 5 scores higher on coding benchmarks: 67.0 versus 42.9 in the Noometry coding category.

How many benchmarks do Claude Opus 5 and Longcat Flash Chat share?

18 benchmarks have published results for both models. Claude Opus 5 has 57 scored results on Noometry and Longcat Flash Chat has 19.

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