Claude Fable 5.1 vs Muse Spark 1.1
Wins 8 of 8 areas
Coding · Agents · Reasoning · Facts · Images and charts · Math · Long documents · Following instructions
Wins 0 of 8 areas
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Claude Fable 5.1 is the stronger all-rounder.Muse Spark 1.1 is cheaper.
Scores updated · 30 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.
- CodingWriting and fixing software60Claude Fable 5.16 of 6 tests
- ReasoningHard problems that need careful thinking40Claude Fable 5.14 of 4 tests
- AgentsCarrying out multi-step tasks on its own30Claude Fable 5.13 of 3 tests
- FactsGetting facts right instead of making them up21Claude Fable 5.12 of 3 tests
- Images and chartsUnderstanding pictures, charts and video10Claude Fable 5.11 of 1 test
- MathCompetition and research-level math10Claude Fable 5.11 of 1 test
- Long documentsFinding answers in very long texts10Claude Fable 5.11 of 1 test
- Following instructionsDoing exactly what it is asked10Claude Fable 5.11 of 1 test
Images and charts, math, 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 1.1 costs 91% less for the same work.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where Claude Fable 5.1 pulls ahead
- Complex command-line tasks across many fieldsTerminal-Bench 4.0+45.9points ahead
- Real work tasks from 44 professionsGDPVal+27.1points ahead
- Long, multi-file coding tasks in real codebasesSWE-bench Pro+19.7points ahead
Where Muse Spark 1.1 pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+22.6points ahead
Every test, side by side
All 30 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingClaude Fable 5.1
- LMArena · WebDevClaude Fable 5.1 by 200 rating points17421542+200 rating
- SWE-bench ProClaude Fable 5.1 by 19.781.261.5+19.7
- Terminal-Bench 2.1Claude Fable 5.1 by 13.591.477.9+13.5
- LiveBench · CodingClaude Fable 5.1 by 9.286.477.2+9.2
- LiveBench · Agentic CodingClaude Fable 5.1 by 7.666.158.5+7.6
- SciCodeClaude Fable 5.1 by 4.363.158.8+4.3
AgentsClaude Fable 5.1
- Terminal-Bench 4.0Claude Fable 5.1 by 45.9526.1+45.9
- GDPValClaude Fable 5.1 by 27.162.735.6+27.1
- τ-Bench V3 · BankingClaude Fable 5.1 by 15.447.231.8+15.4
ReasoningClaude Fable 5.1
- CritPtClaude Fable 5.1 by 14.629.715.1+14.6
- Humanity's Last ExamClaude Fable 5.1 by 12.959.146.2+12.9
- LiveBench · ReasoningClaude Fable 5.1 by 491.787.7+4
- GPQA DiamondClaude Fable 5.1 by 3.993.789.8+3.9
FactsClaude Fable 5.1
- AA-Omniscience · Non-hallucinationMuse Spark 1.1 by 22.627.450+22.6
- AA-Omniscience · AccuracyClaude Fable 5.1 by 15.167.252+15.1
- SimpleQA VerifiedClaude Fable 5.1 by 1370.857.8+13
Images and chartsClaude Fable 5.1
- LMArena · VisionClaude Fable 5.1 by 26 rating points13191293+26 rating
Following instructionsClaude Fable 5.1
- LiveBench · Instruction FollowingClaude Fable 5.1 by 3.47369.6+3.4
Other results10 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.
- GDPval-AA v2 EloClaude Fable 5.1 by 454 rating points18351381+454 rating
- AA Agentic IndexClaude Fable 5.1 by 30.55827.5+30.5
- AA IntelligenceClaude Fable 5.1 by 19.753.433.7+19.7
- AA-OmniscienceClaude Fable 5.1 by 15.443.528.1+15.4
- livebench_languageClaude Fable 5.1 by 15.289.574.3+15.2
- DeepSWE 1.1Claude Fable 5.1 by 14.467.453+14.4
- Artificial Analysis Coding IndexClaude Fable 5.1 by 10.381.671.3+10.3
- livebench_data_analysisClaude Fable 5.1 by 7.780.372.5+7.7
- HealthBench ProfessionalClaude Fable 5.1 by 2.862.159.3+2.8
- Toolathlon VerifiedClaude Fable 5.1 by 2.277.875.6+2.2
Questions people ask
Which is better, Claude Fable 5.1 or Muse Spark 1.1?
Claude Fable 5.1 wins all eight areas we test: coding, agents, reasoning, facts, images and charts, math, long documents and following instructions. Muse Spark 1.1 wins none, but costs 91% less.
Which is better for coding?
Claude Fable 5.1. It wins 6 of the 6 coding tests both models report; Muse Spark 1.1 wins none.
Which is cheaper?
Claude Fable 5.1 costs $10.00 per million input tokens and $50.00 per million output tokens; Muse Spark 1.1 costs $1.25 and $4.25. That makes Muse Spark 1.1 about 91% cheaper for the same work.
How do you compare the two?
We use the 30 benchmark tests both models have published scores on. The verdict counts the 20 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 10 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.