Claude Fable 5 vs Muse Spark 1.3
Wins 3 of 8 areas
Reasoning · Images and charts · Math
Wins 2 of 8 areas
Agents · Following instructions
Claude Fable 5 wins more areas, narrowly.Muse Spark 1.3 is cheaper and better at agents.
Scores updated · 33 tests both models report · How we compare
Where each one wins
Tests won in each of the eight areas we test. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
- ReasoningHard problems that need careful thinking20Claude Fable 52 of 5 tests · 3 ties
- MathCompetition and research-level math20Claude Fable 52 of 3 tests · 1 tie
- Images and chartsUnderstanding pictures, charts and video20Claude Fable 52 of 2 tests
- AgentsCarrying out multi-step tasks on its own12Muse Spark 1.32 of 3 tests
- Following instructionsDoing exactly what it is asked01Muse Spark 1.31 of 1 test
- CodingWriting and fixing software22Even2 each · 1 tie
- FactsGetting facts right instead of making them up11Even1 each
- Long documentsFinding answers in very long texts00Even0 each · 1 tie
Long documents and following instructions rest on a single test each.
What it costs
Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.
Muse Spark 1.3 costs 91% less for the same work.
The biggest differences
The three tests each model wins by the widest margin. Scores are out of 100.
Where Claude Fable 5 pulls ahead
- Extremely hard research-level math problemsFrontierMath Tier 4+43.9points ahead
- Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+21.8points ahead
- Unpublished advanced math problemsFrontierMath Tiers 1-3 (v2)+13points ahead
Where Muse Spark 1.3 pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+30.7points ahead
- Customer-service tasks in a simulated bankτ-Bench V3 · Banking+12.4points ahead
- Real work tasks from 44 professionsGDPVal+3.5points ahead
Every test, side by side
All 33 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingEven
- LiveBench · CodingClaude Fable 5 by 4.98681.1+4.9
- LMArena · WebDevMuse Spark 1.3 by 35 rating points16241659+35 rating
- SciCodeClaude Fable 5 by 2.26158.8+2.2
- LiveBench · Agentic CodingMuse Spark 1.3 by 1.962.264.1+1.9
- Terminal-Bench 2.1tie84.684.3tie
AgentsMuse Spark 1.3
- τ-Bench V3 · BankingMuse Spark 1.3 by 12.438.150.5+12.4
- Terminal-Bench 4.0Claude Fable 5 by 9.142.433.3+9.1
- GDPValMuse Spark 1.3 by 3.555.559+3.5
ReasoningClaude Fable 5
- Humanity's Last ExamClaude Fable 5 by 6.855.548.7+6.8
- CritPtClaude Fable 5 by 3.728.624.9+3.7
- GPQA Diamondtie92.693.5tie
- SimpleBenchtie81.981.8tie
- LiveBench · Reasoningtie89.789.7tie
FactsEven
- AA-Omniscience · Non-hallucinationMuse Spark 1.3 by 30.736.467.1+30.7
- AA-Omniscience · AccuracyClaude Fable 5 by 21.865.343.6+21.8
Images and chartsClaude Fable 5
- MMMU-ProClaude Fable 5 by 2.284.282+2.2
- LMArena · VisionClaude Fable 5 by 17 rating points13251308+17 rating
MathClaude Fable 5
- FrontierMath Tier 4Claude Fable 5 by 43.990.246.3+43.9
- FrontierMath Tiers 1-3 (v2)Claude Fable 5 by 138774+13
- LiveBench · Mathematicstie9696tie
Following instructionsMuse Spark 1.3
- LiveBench · Instruction FollowingMuse Spark 1.3 by 2.275.878+2.2
Other results11 tests, not counted
Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.
- AA-OmniscienceClaude Fable 5 by 18.343.325+18.3
- HiL-Bench (Tools-allowed)Muse Spark 1.3 by 10.656.366.9+10.6
- livebench_languageClaude Fable 5 by 7.990.782.8+7.9
- JobBenchMuse Spark 1.3 by 7.557.464.9+7.5
- DeepSWE 1.1Muse Spark 1.3 by 5.47075.4+5.4
- DeepSearchQA (F1)Claude Fable 5 by 4.894.289.4+4.8
- AA Agentic IndexMuse Spark 1.3 by 4.75155.7+4.7
- AA IntelligenceClaude Fable 5 by 1.549.648.1+1.5
- livebench_data_analysistie80.579.6tie
- OSWorld 2.0tie66.166.9tie
- Artificial Analysis Coding Indextie76.575.8tie
Questions people ask
Which is better, Claude Fable 5 or Muse Spark 1.3?
Claude Fable 5 wins three of the eight areas we test: reasoning, images and charts and math. Muse Spark 1.3 wins agents and following instructions, and costs 91% less. They are level on coding, facts and long documents.
Which is better for coding?
Neither. They win 2 coding tests each of the 5 both models report, and 1 is a tie.
Which is cheaper?
Claude Fable 5 costs $10.00 per million input tokens and $50.00 per million output tokens; Muse Spark 1.3 costs $1.25 and $4.25. That makes Muse Spark 1.3 about 91% cheaper for the same work.
How do you compare the two?
We use the 33 benchmark tests both models have published scores on. The verdict counts the 22 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 11 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.