Noometry

Model comparison

Claude Fable 5.1 vs Qwen3.8 Max

Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 56.8 on the Noometry Index. Qwen3.8 Max costs 6.7× less per token, which makes it the better buy when Claude Fable 5.1's lead doesn't matter for your workload.

Last verified . 36 shared benchmarks.

Claude Fable 5.1 Anthropic

69.0

Rank #2 Confirmed

Qwen3.8 Max Alibaba (Qwen)

56.8

Rank #22 Confirmed

Summary

  • They share 36 benchmarks with published results for both. Claude Fable 5.1 scores higher in 10 categories and Qwen3.8 Max in 0 categories; 10 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Claude Fable 5.1 leads 76.7 to 54.4.
  • The biggest single-benchmark swing is Furniture Assembly: 70% for Claude Fable 5.1 and 20% for Qwen3.8 Max.
  • Qwen3.8 Max is cheaper at $2 / $6 per million input/output tokens, against $10 / $50 for Claude Fable 5.1.

Side by side

Claude Fable 5.1Qwen3.8 Max
ProviderAnthropicAlibaba (Qwen)
Noometry Index69.056.8
Released2026-09-012026-08-02
WeightsProprietaryProprietary
Context window1M1M
Max output128K131K
Input $ / M tokens$10$2
Output $ / M tokens$50$6
Results tracked5239

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Category by category

Coding Claude Fable 5.1 leads

Claude Fable 5.1: 74.7 (#1), Qwen3.8 Max: 53.5 (#29)

BenchmarkClaude Fable 5.1Qwen3.8 Max
LMArena WebDev17441674
FrontierSWE56.3%17.8%
SciCode63.1%53.2%
LMArena Coding15281502
DeepSWE—57.5%
FrontierCode50.9%—
CursorBench51.8%—
GSO88.2%—
WeirdML92.9%—
MirrorCode73.3%—
ALE-Bench2,143—

Agentic & Tool Use Claude Fable 5.1 leads

Claude Fable 5.1: 50.7 (#5), Qwen3.8 Max: 45.4 (#14)

BenchmarkClaude Fable 5.1Qwen3.8 Max
APEX-Agents68.6%63.3%
GDP.pdf29.6%23.2%
Remote Labor Index17.9%—
τ²-bench Banking—55.1%
Vending-Bench 25,422—

Reasoning Claude Fable 5.1 leads

Claude Fable 5.1: 76.7 (#7), Qwen3.8 Max: 54.4 (#26)

BenchmarkClaude Fable 5.1Qwen3.8 Max
NYT Connections (extended)90%88.3%
CritPt31.1%20%
Chess Puzzles47%40%
LMArena Hard Prompts15261496
Mystery Game Puzzles58%38%
DTBench97.6%92%
LMCA65.5%46.2%
Epoch Capabilities Index164.7156.41
ARC-AGI-290%—
ARC-AGI-197.5%—
EBR-Bench57.1%—

Math Claude Fable 5.1 leads

Claude Fable 5.1: 89.6 (#4), Qwen3.8 Max: 73.2 (#20)

BenchmarkClaude Fable 5.1Qwen3.8 Max
FrontierMath (Tiers 1-3)90.2%74.7%
FrontierMath Tier 487.8%46.3%
OTIS Mock AIME 2024-2025100%100%
ProofBench100%58%
LMArena Math15251499
FrontierMath Erdős0%—

Knowledge Claude Fable 5.1 leads

Claude Fable 5.1: 69.6 (#6), Qwen3.8 Max: 61.7 (#27)

BenchmarkClaude Fable 5.1Qwen3.8 Max
SimpleQA Verified70.8%47.3%
LMArena Expert15351507
GPQA Diamond—92.7%
Humanity's Last Exam46.5%—

Multimodal Claude Fable 5.1 leads

Claude Fable 5.1: 53.9 (#4), Qwen3.8 Max: 37.2 (#75)

BenchmarkClaude Fable 5.1Qwen3.8 Max
LMArena Vision13181314
Furniture Assembly70%20%
Blueprint-Bench 241.9%—
LMArena Document1513—

Multilingual Claude Fable 5.1 leads

Claude Fable 5.1: 59.1 (#3), Qwen3.8 Max: 56.7 (#18)

BenchmarkClaude Fable 5.1Qwen3.8 Max
LMArena Non-English15071472
LMArena Chinese15861538
LMArena French15251503
LMArena German15001483
LMArena Japanese15431467
LMArena Korean15341461
LMArena Russian15211481
LMArena Spanish15161492

Instruction Following Claude Fable 5.1 leads

Claude Fable 5.1: 79.2 (#6), Qwen3.8 Max: 77.6 (#17)

BenchmarkClaude Fable 5.1Qwen3.8 Max
LMArena Instruction Following15171479

Long Context Claude Fable 5.1 leads

Claude Fable 5.1: 46.7 (#20), Qwen3.8 Max: 45.6 (#31)

BenchmarkClaude Fable 5.1Qwen3.8 Max
LMArena Longer Query15221489

Writing & Preference Claude Fable 5.1 leads

Claude Fable 5.1: 79.2 (#2), Qwen3.8 Max: 67.1 (#30)

BenchmarkClaude Fable 5.1Qwen3.8 Max
LMArena Text15101483
LMArena Creative Writing15071479
LMArena Multi-Turn14921489
EQ-Bench Creative Writing2162—

Frequently asked questions

Is Claude Fable 5.1 better than Qwen3.8 Max?

Claude Fable 5.1 is the stronger model overall, scoring 69.0 to 56.8 on the Noometry Index. Qwen3.8 Max costs 6.7× less per token, which makes it the better buy when Claude Fable 5.1's lead doesn't matter for your workload.

Which is cheaper, Claude Fable 5.1 or Qwen3.8 Max?

Qwen3.8 Max is cheaper. It lists at $2 per million input tokens and $6 per million output tokens; Claude Fable 5.1 lists at $10 and $50.

Is Claude Fable 5.1 or Qwen3.8 Max better for coding?

Claude Fable 5.1 scores higher on coding benchmarks: 74.7 versus 53.5 in the Noometry coding category.

Which has the bigger context window?

Both accept 1M tokens.

How many benchmarks do Claude Fable 5.1 and Qwen3.8 Max share?

36 benchmarks have published results for both models. Claude Fable 5.1 has 52 scored results on Noometry and Qwen3.8 Max has 39.

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