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Claude Fable 5 vs Muse Spark 1.1

Claude Fable 5 leads Muse Spark 1.1 on coding, 79.3 to 70.3 on the Vibe Coding Index, and Muse Spark 1.1 costs 11.8x less per output token ($4.25 vs $50.00 per million). Updated October 22, 2026; 93 benchmarks have a result for both.

Replace Claude Fable 5 Replace Muse Spark 1.1
Claude Fable 5Anthropic
Coding
79.3
Overall
79.0
Output $/M
$50.00
88
Muse Spark 1.1Meta
Coding
70.3
Overall
67.0
Output $/M
$4.25
5
vs boards won of 93 shared

Claude Fable 5 or Muse Spark 1.1: which to pick

Pick Claude Fable 5 for coding: it scores 79.3 on the Vibe Coding Index against 70.3 for Muse Spark 1.1.

Pick Muse Spark 1.1 for output tokens 11.8x cheaper ($4.25 vs $50.00 per million) and a lower cost per solved task ($0.43 against $2.16).

Model AClaude Fable 5Anthropic79.3/1006 independent benchmarks$2.16 per solved taskModel BMuse Spark 1.1Meta70.3/1003 independent benchmarks$0.43 per solved task
Shared results
93
Claude Fable 5 only
34
Muse Spark 1.1 only
3
Like-for-like categories
8 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, Muse Spark 1.1 70.3 from 3 benchmarks.
Widest category
Math, 22.2 points apart on average over 3 shared benchmarks.
Widest single gap
ProofBench: Claude Fable 5 95.0% against Muse Spark 1.1 39.0%, 56.0 points apart on a 0 to 100 scale.
Output price
Claude Fable 5 $50.00 against Muse Spark 1.1 $4.25 per million output tokens, 11.8x apart.
Context window
Claude Fable 5 takes 1M tokens, Muse Spark 1.1 1.05M.

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 5BarsMuse Spark 1.1Ties
Coding140
Intelligence20
Agentic work122
Reasoning100
Math30
Knowledge91
Web design80
General302
All shared boards885
CodingLike-for-likeSix of these boards feed the Vibe Coding Index140
Coding benchmarks for Claude Fable 5 and Muse Spark 1.1
BenchmarkClaude Fable 5Muse Spark 1.1Leader
LiveBench coding98.3%Not measuredOnly Claude Fable 5 measured
LMArena WebDev16241542Claude Fable 5
AA Coding Index76.571.3Claude Fable 5
LiveCodeBench (Vals AI)89.8%85.9%Claude Fable 5
SWE-bench Verified (Vals AI)95.0%82.0%Claude Fable 5
Terminal-Bench 4 (Vals AI)41.4%Not measuredOnly Claude Fable 5 measured
Vibe Code Bench (Vals AI)90.3%72.2%Claude Fable 5
Code migration (Vals AI)55.1%31.1%Claude Fable 5
ProgramBench (Vals AI)2.0%0.0%Claude Fable 5
Terminal-Bench 2.1 (Vals AI)80.5%69.3%Claude Fable 5
SkillsBench (Vals AI)Not measured59.2%Only Muse Spark 1.1 measured
SciCode61.0%58.8%Claude Fable 5
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-Bench2041.3Not measuredOnly Claude Fable 5 measured
LMArena Text: coding15181498Claude Fable 5
LMArena Text: software and IT15131498Claude Fable 5
LMArena WebDev: React16311532Claude Fable 5
LMArena WebDev: HTML16511540Claude Fable 5
LMArena WebDev: from an image16231540Claude Fable 5
Neither model has a result on the other 15 boards here
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index20
Intelligence benchmarks for Claude Fable 5 and Muse Spark 1.1
BenchmarkClaude Fable 5Muse Spark 1.1Leader
AA Intelligence Index49.633.7Claude Fable 5
Epoch Capabilities Index163.4154.1Claude Fable 5
Agentic workLike-for-likePublic boards, shown as published, kept out of the index122
Agentic work benchmarks for Claude Fable 5 and Muse Spark 1.1
BenchmarkClaude Fable 5Muse Spark 1.1Leader
AA Agentic Index50.725.8Claude Fable 5
Design Arena: agents building web apps12611207Claude Fable 5
Design Arena: agents building full-stack apps12801199Claude Fable 5
Design Arena: agents building mobile apps12641175Claude Fable 5
Design Arena: agents building Android apps12841178Claude Fable 5
Design Arena: agents building Godot games12921103Claude Fable 5
Design Arena: agents building games12851183Claude Fable 5
Design Arena: HTML slides12271195Claude Fable 5
Design Arena: PowerPoint slides12701155Claude Fable 5
Design Arena: spreadsheetsNot measured1042Only Muse Spark 1.1 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%57.2%Muse Spark 1.1
Tax Agent Bench (Vals AI)38.3%Not measuredOnly Claude Fable 5 measured
Legal Research Bench (Vals AI)49.5%38.0%Claude Fable 5
Excel Modeling Benchmark (Vals AI)73.7%56.4%Claude Fable 5
Terminal-Bench-Science (Vals AI)15.7%Not measuredOnly Claude Fable 5 measured
Time Horizon Index (Vals AI)Not measured1.7%Only Muse Spark 1.1 measured
τ²-Bench Telecom98.5%Not measuredOnly Claude Fable 5 measured
APEX-Agents63.6%31.8%Claude Fable 5
Remote Labor Index16.1%Not measuredOnly Claude Fable 5 measured
PostTrainBench41.8%Not measuredOnly Claude Fable 5 measured
Vending-Bench 2$5,680$6,520Muse Spark 1.1
LMArena Search1229Not measuredOnly Claude Fable 5 measured
Neither model has a result on the other 16 boards here
ReasoningLike-for-likePublic boards, shown as published, kept out of the index100
Reasoning benchmarks for Claude Fable 5 and Muse Spark 1.1
BenchmarkClaude Fable 5Muse Spark 1.1Leader
GPQA Diamond93.2%91.2%Claude Fable 5
LiveBench reasoning89.7%Not measuredOnly Claude Fable 5 measured
MMMU Pro (Vals AI)89.3%86.6%Claude Fable 5
GPQA Diamond (Artificial Analysis run)92.6%89.8%Claude Fable 5
Humanity's Last Exam (Artificial Analysis run)55.5%46.2%Claude Fable 5
GPQA Diamond (Epoch AI run)85.9%Not measuredOnly Claude Fable 5 measured
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%34.0%Claude Fable 5
Mystery game puzzles52.0%Not measuredOnly Claude Fable 5 measured
EBR-bench39.5%Not measuredOnly Claude Fable 5 measured
LMArena Text: hard prompts15071485Claude Fable 5
LMArena Text: expert15341478Claude Fable 5
LMArena Text: hard prompts in English15091480Claude Fable 5
LMArena Vision: diagrams13571305Claude Fable 5
LMArena Vision: homework13611287Claude Fable 5
Kagi LLM Benchmark91.4%Not measuredOnly Claude Fable 5 measured
Neither model has a result on the other 4 boards here
MathLike-for-likePublic boards, shown as published, kept out of the index30
Math benchmarks for Claude Fable 5 and Muse Spark 1.1
BenchmarkClaude Fable 5Muse Spark 1.1Leader
OTIS Mock AIME100.0%Not measuredOnly Claude Fable 5 measured
FrontierMath, tiers 1 to 387.0%Not measuredOnly Claude Fable 5 measured
FrontierMath, tier 490.2%Not measuredOnly Claude Fable 5 measured
ProofBench95.0%39.0%Claude Fable 5
LMArena Text: math15161482Claude Fable 5
LMArena Text: mathematical work15151487Claude Fable 5
Neither model has a result on the other 7 boards here
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index91
Knowledge benchmarks for Claude Fable 5 and Muse Spark 1.1
BenchmarkClaude Fable 5Muse Spark 1.1Leader
MMLU Pro91.5%88.7%Claude Fable 5
LegalBench (Vals AI)88.6%85.0%Claude Fable 5
CorpFin (Vals AI)71.8%71.3%Claude Fable 5
TaxEval (Vals AI)76.9%79.7%Muse Spark 1.1
MortgageTax (Vals AI)68.9%66.1%Claude Fable 5
MedCode (Vals AI)56.1%Not measuredOnly Claude Fable 5 measured
SimpleQA Verified70.7%57.8%Claude Fable 5
LMArena Text: science15061484Claude Fable 5
LMArena Text: medicine and healthcare14801479Claude Fable 5
LMArena Text: legal and government14981481Claude Fable 5
LMArena Text: business and finance14801470Claude Fable 5
Neither model has a result on the other 7 boards here
Web designLike-for-likePublic boards, shown as published, kept out of the index80
Web design benchmarks for Claude Fable 5 and Muse Spark 1.1
BenchmarkClaude Fable 5Muse Spark 1.1Leader
Design Arena: websites12951270Claude Fable 5
Design Arena: UI components13161289Claude Fable 5
Design Arena: game dev13351269Claude Fable 5
Design Arena: data viz13041268Claude Fable 5
Design Arena: 3D13181260Claude Fable 5
Design Arena: all code categories13101276Claude Fable 5
Design Arena: SVG13021235Claude Fable 5
Design Arena: ASCII art13291271Claude Fable 5
LiveBench design84.7%Not measuredOnly Claude Fable 5 measured
GeneralLike-for-likePublic boards, shown as published, kept out of the index302
General benchmarks for Claude Fable 5 and Muse Spark 1.1
BenchmarkClaude Fable 5Muse Spark 1.1Leader
LiveBench data analysis80.5%Not measuredOnly Claude Fable 5 measured
Public Benefits Bench (Vals AI)70.4%61.3%Claude Fable 5
SAGE (Vals AI)51.9%45.6%Claude Fable 5
MedScribe (Vals AI)88.5%88.9%Muse Spark 1.1
Vals Multimodal Index74.2%66.7%Claude Fable 5
IFBench63.5%Not measuredOnly Claude Fable 5 measured
Long context reasoning (AA-LCR)82.3%77.7%Claude Fable 5
DTBench98.4%94.4%Claude Fable 5
LMCA61.2%49.9%Claude Fable 5
Surface Evolver Bench95.0%52.5%Claude Fable 5
Furniture assembly35.8%Not measuredOnly Claude Fable 5 measured
LMArena Text14911478Claude Fable 5
LMArena Text: instruction following15021457Claude Fable 5
LMArena Text: creative writing14941435Claude Fable 5
LMArena Vision13251293Claude Fable 5
LMArena Text: English14981478Claude Fable 5
LMArena Text: non-English14821471Claude Fable 5
LMArena Text: Chinese15431515Claude Fable 5
LMArena Text: German14861469Claude Fable 5
LMArena Text: Japanese15041450Claude Fable 5
LMArena Text: Korean14871459Claude Fable 5
LMArena Text: French15051492Claude Fable 5
LMArena Text: Spanish14981464Claude Fable 5
LMArena Text: Russian15031482Claude Fable 5
LMArena Text: Polish14941499Muse Spark 1.1
LMArena Text: multi-turn15041484Claude Fable 5
LMArena Text: longer queries15101462Claude Fable 5
LMArena Text: writing and language15011448Claude Fable 5
LMArena Text: entertainment and media14821438Claude Fable 5
LMArena Vision: English13231292Claude Fable 5
LMArena Vision: Chinese13731348Claude Fable 5
LMArena Vision: reading text13371301Claude Fable 5
LMArena Vision: humor13411288Claude Fable 5
LMArena Vision: creative writing13381253Claude Fable 5
LMArena Document14961465Claude Fable 5
Neither model has a result on the other 11 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 Muse Spark 1.1
BenchmarkClaude Fable 5Muse Spark 1.1Leader
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
Muse Spark 1.1$0.0034Fits in one request

Muse Spark 1.1 costs less

Repository review

50K input + 3K output tokens

Claude Fable 5$0.650Fits in one request
Muse Spark 1.1$0.075Fits in one request

Muse Spark 1.1 costs less

Agent loop

200K input + 10K output tokens

Claude Fable 5$2.50Fits in one request
Muse Spark 1.1$0.292Fits in one request

Muse Spark 1.1 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 Muse Spark 1.1
SpecificationAnthropic Claude Fable 5Meta Muse Spark 1.1
MakerAnthropicMeta
WeightsNo public weights listedNo public weights listed
ReleasedJune 9, 2026July 16, 2026
Context window1M1.05M
Input $/Mtok$10.00$1.25
Output $/Mtok$50.00$4.25
Coding index79.370.3
Independent measurements behind it63
Cost per solved task$2.16$0.43
SourceOpenRouter listingOpenRouter listing

Questions

Is Claude Fable 5 better than Muse Spark 1.1 for coding?

Pick Claude Fable 5 for coding: it scores 79.3 on the Vibe Coding Index against 70.3 for Muse Spark 1.1. Pick Muse Spark 1.1 for output tokens 11.8x cheaper ($4.25 vs $50.00 per million) and a lower cost per solved task ($0.43 against $2.16).

Which is cheaper, Claude Fable 5 or Muse Spark 1.1?

Claude Fable 5 costs $10.00 per million input tokens and $50.00 per million output tokens; Muse Spark 1.1 costs $1.25 and $4.25. Per solved SWE-bench Verified task, Claude Fable 5 costs $2.16 and Muse Spark 1.1 $0.43.

Which has the bigger context window, Claude Fable 5 or Muse Spark 1.1?

Muse Spark 1.1, with 1.05M tokens against 1M.

How many benchmarks is the Claude Fable 5 vs Muse Spark 1.1 comparison based on?

93 benchmarks have a result for both models as of October 22, 2026. Claude Fable 5's coding index rests on 6 independent benchmarks and Muse Spark 1.1's on 3. Where only one model has a result, the page says so instead of naming a winner.

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<p style="font:13px/1.4 sans-serif;margin:6px 0 0">Source: <a href="https://llmbenchmark.ai/compare/claude-fable-5-vs-meta-muse-spark-1-1">LLMBenchmark.ai, Claude Fable 5 vs Muse Spark 1.1</a></p>