Noometry

Model comparison

Claude Opus 4.1 vs Qwen3 8B

Claude Opus 4.1 is the stronger model overall, scoring 41.0 to 33.7 on the Noometry Index. Qwen3 8B costs 97× less per token, which makes it the better buy when Claude Opus 4.1's lead doesn't matter for your workload.

Last verified . 7 shared benchmarks.

Claude Opus 4.1 Anthropic

41.0

Rank #142 Confirmed

Qwen3 8B Alibaba (Qwen)

33.7

Rank #238 Confirmed

Summary

  • They share 7 benchmarks with published results for both. Claude Opus 4.1 scores higher in 5 categories and Qwen3 8B in 1 category; 6 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Claude Opus 4.1 leads 32.2 to 16.6.
  • The biggest single-benchmark swing is LMCA: 37.1% for Claude Opus 4.1 and 8.8% for Qwen3 8B.
  • Qwen3 8B is cheaper at $0.18 / $0.70 per million input/output tokens, against $15 / $75 for Claude Opus 4.1.
  • Claude Opus 4.1 accepts more context: 200K tokens versus 131K.
  • Qwen3 8B has downloadable open weights; the other is API-only.

Side by side

Claude Opus 4.1Qwen3 8B
ProviderAnthropicAlibaba (Qwen)
Noometry Index41.033.7
Released2025-08-052025-04
WeightsProprietaryOpen
Context window200K131K
Max output32K8K
Input $ / M tokens$15$0.18
Output $ / M tokens$75$0.70
Results tracked4811

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Category by category

Coding Claude Opus 4.1 leads

Claude Opus 4.1: 44.4 (#73), Qwen3 8B: 34.0 (#248)

BenchmarkClaude Opus 4.1Qwen3 8B
SWE-bench Verified73.3%—
LMArena WebDev1390—
SciCode—22.6%
WeirdML45.9%—
LMArena Coding1479—
ALE-Bench674.77—
AlgoTune1.34—

Agentic & Tool Use Claude Opus 4.1 leads

Claude Opus 4.1: 35.0 (#41), Qwen3 8B: 30.2 (#78)

BenchmarkClaude Opus 4.1Qwen3 8B
Terminal-Bench38%—
Berkeley Function Calling Leaderboard—42.6%
GDPval43.6%—
Cybench42%—
DeepResearch Bench48.3%—
LMArena Search1148—
METR Time Horizons66.8%—

Reasoning Claude Opus 4.1 leads

Claude Opus 4.1: 32.2 (#76), Qwen3 8B: 16.6 (#303)

BenchmarkClaude Opus 4.1Qwen3 8B
Chess Puzzles7%5%
DTBench80%59.7%
LMCA37.1%8.8%
Epoch Capabilities Index144.12136.17
SimpleBench60%—
CritPt—0%
EnigmaEval7.2%—
EBR-Bench7.9%—
LMArena Hard Prompts1443—
Mystery Game Puzzles21%—
ForecastBench62—

Math Qwen3 8B leads

Claude Opus 4.1: 22.3 (#277), Qwen3 8B: 34.9 (#191)

BenchmarkClaude Opus 4.1Qwen3 8B
OTIS Mock AIME 2024-202568.9%56.1%
FrontierMath (Tiers 1-3)12.6%—
FrontierMath Tier 42.4%—
LMArena Math1431—
FrontierMath (Feb 2025 set)7.2%—
FrontierMath Tier 4 (v1)4.2%—

Knowledge Claude Opus 4.1 leads

Claude Opus 4.1: 42.0 (#101), Qwen3 8B: 36.1 (#173)

BenchmarkClaude Opus 4.1Qwen3 8B
GPQA Diamond77.3%56.8%
Vectara Hallucination Rate11.8%4.8%
Humanity's Last Exam11.5%—
Confabulations17.1%—
LMArena Expert1439—

Multimodal Not comparable

Claude Opus 4.1: 26.8 (#119), Qwen3 8B: —

BenchmarkClaude Opus 4.1Qwen3 8B
VPCT35%—

Multilingual Not comparable

Claude Opus 4.1: 52.0 (#95), Qwen3 8B: —

BenchmarkClaude Opus 4.1Qwen3 8B
LMArena Non-English1405—
LMArena Chinese1427—
LMArena French1431—
LMArena German1413—
LMArena Japanese1378—
LMArena Korean1380—
LMArena Russian1422—
LMArena Spanish1448—

Instruction Following Not comparable

Claude Opus 4.1: 75.6 (#58), Qwen3 8B: —

BenchmarkClaude Opus 4.1Qwen3 8B
LMArena Instruction Following1435—

Long Context Claude Opus 4.1 leads

Claude Opus 4.1: 44.5 (#63), Qwen3 8B: 37.9 (#210)

BenchmarkClaude Opus 4.1Qwen3 8B
Fiction.LiveBench—62.1%
LMArena Longer Query1455—

Writing & Preference Not comparable

Claude Opus 4.1: 62.4 (#74), Qwen3 8B: —

BenchmarkClaude Opus 4.1Qwen3 8B
LMArena Text1419—
LMArena Creative Writing1412—
Short-Story Creative Writing84.7%—
LMArena Multi-Turn1444—

Frequently asked questions

Is Claude Opus 4.1 better than Qwen3 8B?

Claude Opus 4.1 is the stronger model overall, scoring 41.0 to 33.7 on the Noometry Index. Qwen3 8B costs 97× less per token, which makes it the better buy when Claude Opus 4.1's lead doesn't matter for your workload.

Which is cheaper, Claude Opus 4.1 or Qwen3 8B?

Qwen3 8B is cheaper. It lists at $0.18 per million input tokens and $0.70 per million output tokens; Claude Opus 4.1 lists at $15 and $75.

Is Claude Opus 4.1 or Qwen3 8B better for coding?

Claude Opus 4.1 scores higher on coding benchmarks: 44.4 versus 34.0 in the Noometry coding category.

Which has the bigger context window?

Claude Opus 4.1 does, with 200K tokens against 131K.

How many benchmarks do Claude Opus 4.1 and Qwen3 8B share?

7 benchmarks have published results for both models. Claude Opus 4.1 has 48 scored results on Noometry and Qwen3 8B has 11.

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