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Claude Fable 5 vs Qwen3.5-Flash

Claude Fable 5 leads Qwen3.5-Flash on coding, 79.3 to 41.1 on the Vibe Coding Index, and Qwen3.5-Flash costs 192.3x less per output token ($0.26 vs $50.00 per million). Updated October 22, 2026; 53 benchmarks have a result for both.

Replace Claude Fable 5 Replace Qwen3.5-Flash
Claude Fable 5Anthropic
Coding
79.3
Overall
79.0
Output $/M
$50.00
53
Qwen3.5-FlashQwen
Coding
41.1
Overall
50.1
Output $/M
$0.26
0
vs boards won of 53 shared

Claude Fable 5 or Qwen3.5-Flash: which to pick

Pick Claude Fable 5 for coding: it scores 79.3 on the Vibe Coding Index against 41.1 for Qwen3.5-Flash.

Pick Qwen3.5-Flash for output tokens 192.3x cheaper ($0.26 vs $50.00 per million) and a lower cost per solved task ($0.40 against $2.16).

Model AClaude Fable 5Anthropic79.3/1006 independent benchmarks$2.16 per solved taskModel BQwen3.5-FlashQwen41.1/1002 independent benchmarks$0.40 per solved task
Shared results
53
Claude Fable 5 only
82
Qwen3.5-Flash only
2
Like-for-like categories
6 of 9

Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.

Which one for your work

Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.

At a glance

Coding index
Claude Fable 5 79.3 from 6 benchmarks, Qwen3.5-Flash 41.1 from 2 benchmarks.
Widest category
Coding, 37.2 points apart on average over 8 shared benchmarks.
Widest single gap
FrontierMath, tiers 1 to 3: Claude Fable 5 87.0% against Qwen3.5-Flash 18.2%, 68.8 points apart on a 0 to 100 scale.
Output price
Claude Fable 5 $50.00 against Qwen3.5-Flash $0.26 per million output tokens, 192.3x apart.
Context window
Both take 1M tokens.

Benchmark by benchmark

First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.

Boards won, where both have a result
CategoryClaude Fable 5BarsQwen3.5-FlashTies
Coding80
Intelligence10
Reasoning80
Math40
Knowledge110
General210
All shared boards530
CodingLike-for-likeSix of these boards feed the Vibe Coding Index80
Coding benchmarks for Claude Fable 5 and Qwen3.5-Flash
BenchmarkClaude Fable 5Qwen3.5-FlashLeader
LiveBench coding98.3%Not measuredOnly Claude Fable 5 measured
LMArena WebDev16241244Claude Fable 5
AA Coding Index76.5Not measuredOnly Claude Fable 5 measured
LiveCodeBench (Vals AI)89.8%83.3%Claude Fable 5
SWE-bench Verified (Vals AI)95.0%64.4%Claude Fable 5
Terminal-Bench 4 (Vals AI)41.4%Not measuredOnly Claude Fable 5 measured
Vibe Code Bench (Vals AI)90.3%Not measuredOnly Claude Fable 5 measured
Code migration (Vals AI)55.1%Not measuredOnly Claude Fable 5 measured
ProgramBench (Vals AI)2.0%Not measuredOnly Claude Fable 5 measured
Terminal-Bench 2.1 (Vals AI)80.5%Not measuredOnly Claude Fable 5 measured
SciCode61.0%Not measuredOnly Claude Fable 5 measured
Terminal-Bench Hard (Artificial Analysis run)62.9%Not measuredOnly Claude Fable 5 measured
FrontierCode53.5%Not measuredOnly Claude Fable 5 measured
FrontierSWE47.0%Not measuredOnly Claude Fable 5 measured
GSO-Bench78.4%Not measuredOnly Claude Fable 5 measured
WeirdML91.9%Not measuredOnly Claude Fable 5 measured
MirrorCode63.9%Not measuredOnly Claude Fable 5 measured
ALE-Bench2041.3265.9Claude Fable 5
LMArena Text: coding15181412Claude Fable 5
LMArena Text: software and IT15131416Claude Fable 5
LMArena WebDev: React16311229Claude Fable 5
LMArena WebDev: HTML16511291Claude Fable 5
LMArena WebDev: from an image1623Not measuredOnly Claude Fable 5 measured
SWE Atlas: Codebase QnA39.0%Not measuredOnly Claude Fable 5 measured
SWE Atlas: Refactoring54.8%Not measuredOnly Claude Fable 5 measured
SWE Atlas: Test Writing55.6%Not measuredOnly Claude Fable 5 measured
Neither model has a result on the other 17 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
Intelligence benchmarks for Claude Fable 5 and Qwen3.5-Flash
BenchmarkClaude Fable 5Qwen3.5-FlashLeader
AA Intelligence Index49.6Not measuredOnly Claude Fable 5 measured
Epoch Capabilities Index163.4143.5Claude Fable 5
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index24 boards, none shared
Agentic work benchmarks for Claude Fable 5 and Qwen3.5-Flash
BenchmarkClaude Fable 5Qwen3.5-FlashLeader
AA Agentic Index50.7Not measuredOnly Claude Fable 5 measured
Design Arena: agents building web apps1261Not measuredOnly Claude Fable 5 measured
Design Arena: agents building full-stack apps1280Not measuredOnly Claude Fable 5 measured
Design Arena: agents building mobile apps1263Not measuredOnly Claude Fable 5 measured
Design Arena: agents building Android apps1283Not measuredOnly Claude Fable 5 measured
Design Arena: agents building Godot games1292Not measuredOnly Claude Fable 5 measured
Design Arena: agents building games1285Not measuredOnly Claude Fable 5 measured
Design Arena: HTML slides1216Not measuredOnly Claude Fable 5 measured
Design Arena: PowerPoint slides1269Not measuredOnly Claude Fable 5 measured
LiveBench research86.9%Not measuredOnly Claude Fable 5 measured
LiveBench browser92.0%Not measuredOnly Claude Fable 5 measured
LiveBench long agentic53.2%Not measuredOnly Claude Fable 5 measured
Finance Agent (Vals AI)56.3%Not measuredOnly Claude Fable 5 measured
Tax Agent Bench (Vals AI)38.3%Not measuredOnly Claude Fable 5 measured
Legal Research Bench (Vals AI)49.5%Not measuredOnly Claude Fable 5 measured
Excel Modeling Benchmark (Vals AI)73.7%Not measuredOnly Claude Fable 5 measured
Terminal-Bench-Science (Vals AI)15.7%Not measuredOnly Claude Fable 5 measured
τ²-Bench Telecom98.5%Not measuredOnly Claude Fable 5 measured
APEX-Agents63.6%Not measuredOnly Claude Fable 5 measured
Remote Labor Index16.1%Not measuredOnly Claude Fable 5 measured
PostTrainBench41.8%Not measuredOnly Claude Fable 5 measured
Vending-Bench 2$5,680Not measuredOnly Claude Fable 5 measured
LMArena Search1229Not measuredOnly Claude Fable 5 measured
MCP Atlas83.3%Not measuredOnly Claude Fable 5 measured
Neither model has a result on the other 18 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index80
Reasoning benchmarks for Claude Fable 5 and Qwen3.5-Flash
BenchmarkClaude Fable 5Qwen3.5-FlashLeader
GPQA Diamond93.2%82.8%Claude Fable 5
LiveBench reasoning89.7%Not measuredOnly Claude Fable 5 measured
MMMU Pro (Vals AI)89.3%81.9%Claude Fable 5
GPQA Diamond (Artificial Analysis run)92.6%Not measuredOnly Claude Fable 5 measured
Humanity's Last Exam (Artificial Analysis run)55.5%Not measuredOnly Claude Fable 5 measured
GPQA Diamond (Epoch AI run)85.9%82.3%Claude Fable 5
ARC-AGI98.5%Not measuredOnly Claude Fable 5 measured
ARC-AGI-289.2%Not measuredOnly Claude Fable 5 measured
SimpleBench81.9%Not measuredOnly Claude Fable 5 measured
Chess puzzles47.0%14.0%Claude Fable 5
Mystery game puzzles52.0%20.0%Claude Fable 5
EBR-bench39.5%Not measuredOnly Claude Fable 5 measured
LMArena Text: hard prompts15071403Claude Fable 5
LMArena Text: expert15341407Claude Fable 5
LMArena Text: hard prompts in English15091409Claude Fable 5
LMArena Vision: diagrams1357Not measuredOnly Claude Fable 5 measured
LMArena Vision: homework1361Not measuredOnly Claude Fable 5 measured
Kagi LLM Benchmark91.4%Not measuredOnly Claude Fable 5 measured
Neither model has a result on the other 5 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index40
Math benchmarks for Claude Fable 5 and Qwen3.5-Flash
BenchmarkClaude Fable 5Qwen3.5-FlashLeader
AIMENot measured92.5%Only Qwen3.5-Flash measured
OTIS Mock AIME100.0%84.4%Claude Fable 5
FrontierMath, tiers 1 to 387.0%18.2%Claude Fable 5
FrontierMath, tier 490.2%Not measuredOnly Claude Fable 5 measured
ProofBench95.0%Not measuredOnly Claude Fable 5 measured
LMArena Text: math15161407Claude Fable 5
LMArena Text: mathematical work15151413Claude Fable 5
MathArena51.5%Not measuredOnly Claude Fable 5 measured
Neither model has a result on the other 6 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index110
Knowledge benchmarks for Claude Fable 5 and Qwen3.5-Flash
BenchmarkClaude Fable 5Qwen3.5-FlashLeader
MMLU Pro91.5%84.1%Claude Fable 5
LegalBench (Vals AI)88.6%84.3%Claude Fable 5
CaseLaw (Vals AI)Not measured56.0%Only Qwen3.5-Flash measured
CorpFin (Vals AI)71.8%63.6%Claude Fable 5
TaxEval (Vals AI)76.9%72.2%Claude Fable 5
MortgageTax (Vals AI)68.9%67.4%Claude Fable 5
MedCode (Vals AI)56.1%33.0%Claude Fable 5
SimpleQA Verified70.7%20.3%Claude Fable 5
LMArena Text: science15061415Claude Fable 5
LMArena Text: medicine and healthcare14801407Claude Fable 5
LMArena Text: legal and government14981398Claude Fable 5
LMArena Text: business and finance14801394Claude Fable 5
PRBench Finance53.9%Not measuredOnly Claude Fable 5 measured
PRBench Legal52.6%Not measuredOnly Claude Fable 5 measured
Neither model has a result on the other 6 boards here
Web designDirectional onlyPublic boards, shown as published, kept out of the index9 boards, none shared
Web design benchmarks for Claude Fable 5 and Qwen3.5-Flash
BenchmarkClaude Fable 5Qwen3.5-FlashLeader
Design Arena: websites1295Not measuredOnly Claude Fable 5 measured
Design Arena: UI components1316Not measuredOnly Claude Fable 5 measured
Design Arena: game dev1335Not measuredOnly Claude Fable 5 measured
Design Arena: data viz1305Not measuredOnly Claude Fable 5 measured
Design Arena: 3D1318Not measuredOnly Claude Fable 5 measured
Design Arena: all code categories1310Not measuredOnly Claude Fable 5 measured
Design Arena: SVG1301Not measuredOnly Claude Fable 5 measured
Design Arena: ASCII art1329Not measuredOnly Claude Fable 5 measured
LiveBench design84.7%Not measuredOnly Claude Fable 5 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index210
General benchmarks for Claude Fable 5 and Qwen3.5-Flash
BenchmarkClaude Fable 5Qwen3.5-FlashLeader
LiveBench data analysis80.5%Not measuredOnly Claude Fable 5 measured
Public Benefits Bench (Vals AI)70.4%Not measuredOnly Claude Fable 5 measured
SAGE (Vals AI)51.9%42.5%Claude Fable 5
MedScribe (Vals AI)88.5%70.6%Claude Fable 5
Vals Multimodal Index74.2%Not measuredOnly Claude Fable 5 measured
IFBench63.5%Not measuredOnly Claude Fable 5 measured
Long context reasoning (AA-LCR)82.3%Not measuredOnly Claude Fable 5 measured
DTBench98.4%82.9%Claude Fable 5
LMCA61.2%29.1%Claude Fable 5
Surface Evolver Bench95.0%Not measuredOnly Claude Fable 5 measured
Furniture assembly35.8%Not measuredOnly Claude Fable 5 measured
LMArena Text14911397Claude Fable 5
LMArena Text: instruction following15021374Claude Fable 5
LMArena Text: creative writing14941343Claude Fable 5
LMArena Vision1325Not measuredOnly Claude Fable 5 measured
LMArena Text: English14981404Claude Fable 5
LMArena Text: non-English14821385Claude Fable 5
LMArena Text: Chinese15431445Claude Fable 5
LMArena Text: German14861390Claude Fable 5
LMArena Text: Japanese15041369Claude Fable 5
LMArena Text: Korean14871344Claude Fable 5
LMArena Text: French15051413Claude Fable 5
LMArena Text: Spanish14981400Claude Fable 5
LMArena Text: Russian15031380Claude Fable 5
LMArena Text: Polish14941376Claude Fable 5
LMArena Text: multi-turn15041393Claude Fable 5
LMArena Text: longer queries15101392Claude Fable 5
LMArena Text: writing and language15011369Claude Fable 5
LMArena Text: entertainment and media14821347Claude Fable 5
LMArena Vision: English1323Not measuredOnly Claude Fable 5 measured
LMArena Vision: Chinese1373Not measuredOnly Claude Fable 5 measured
LMArena Vision: reading text1337Not measuredOnly Claude Fable 5 measured
LMArena Vision: humor1341Not measuredOnly Claude Fable 5 measured
LMArena Vision: creative writing1338Not measuredOnly Claude Fable 5 measured
LMArena Document1496Not measuredOnly Claude Fable 5 measured
EQ-Bench 41340Not measuredOnly Claude Fable 5 measured
Neither model has a result on the other 12 boards here
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
Image generation benchmarks for Claude Fable 5 and Qwen3.5-Flash
BenchmarkClaude Fable 5Qwen3.5-FlashLeader
Neither model has a result on 5 boards here

What each workload costs

Three fixed token mixes at each model's listed price, so per-token rates become a bill.

Chat turn

1K input + 500 output tokens

Claude Fable 5$0.035Fits in one request
Qwen3.5-Flash$0.0002Fits in one request

Qwen3.5-Flash costs less

Repository review

50K input + 3K output tokens

Claude Fable 5$0.650Fits in one request
Qwen3.5-Flash$0.0040Fits in one request

Qwen3.5-Flash costs less

Agent loop

200K input + 10K output tokens

Claude Fable 5$2.50Fits in one request
Qwen3.5-Flash$0.016Fits in one request

Qwen3.5-Flash costs less

Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.

Specification differences

The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.

Specifications of Claude Fable 5 and Qwen3.5-Flash
SpecificationAnthropic Claude Fable 5Qwen3.5-Flash
MakerAnthropicQwen
WeightsNo public weights listedNo public weights listed
ReleasedJune 9, 2026February 25, 2026
Context window1M1M
Input $/Mtok$10.00$0.065
Output $/Mtok$50.00$0.26
Coding index79.341.1
Independent measurements behind it62
Cost per solved task$2.16$0.40
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Fable 5 better than Qwen3.5-Flash for coding?

Pick Claude Fable 5 for coding: it scores 79.3 on the Vibe Coding Index against 41.1 for Qwen3.5-Flash. Pick Qwen3.5-Flash for output tokens 192.3x cheaper ($0.26 vs $50.00 per million) and a lower cost per solved task ($0.40 against $2.16).

Which is cheaper, Claude Fable 5 or Qwen3.5-Flash?

Claude Fable 5 costs $10.00 per million input tokens and $50.00 per million output tokens; Qwen3.5-Flash costs $0.065 and $0.26. Per solved SWE-bench Verified task, Claude Fable 5 costs $2.16 and Qwen3.5-Flash $0.40.

Which has the bigger context window, Claude Fable 5 or Qwen3.5-Flash?

Neither: both take 1M tokens.

How many benchmarks is the Claude Fable 5 vs Qwen3.5-Flash comparison based on?

53 benchmarks have a result for both models as of October 22, 2026. Claude Fable 5's coding index rests on 6 independent benchmarks and Qwen3.5-Flash's on 2. Where only one model has a result, the page says so instead of naming a winner.

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<iframe src="https://llmbenchmark.ai/embed/compare/claude-fable-5-vs-qwen3-5-flash-02-23" title="Claude Fable 5 vs Qwen3.5-Flash, LLMBenchmark.ai" width="100%" height="360" style="border:0;max-width:100%" loading="lazy"></iframe>
<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/claude-fable-5-vs-qwen3-5-flash-02-23">LLMBenchmark.ai, Claude Fable 5 vs Qwen3.5-Flash</a></p>