Claude Fable 5.1 vs Muse Spark 1.3

Change models
IndexAll categories, out of 100.
76.2 ±2.4 best
70.1 ±4.0
GapIndex points below the top.
Top
−6.1
CoverageIndex weight that has results.
95% best
85%
SpeedOutput tokens per second.
69/s
76/s best
EloLMArena rating and rank.
1512 best
1491
ReleasedMonth of release.
2026-09
2026-09
Input / 1MUS dollars per 1M input tokens.
$10.00
$1.25 best
Output / 1MUS dollars per 1M output tokens.
$50.00
$4.25 best
Batch output / 1MBatch price per 1M output tokens.
$25.00
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1K chats2K tokens in, 500 out, each.
$45.00
$4.63 best
1K documents20K tokens in, 1K out, each.
$250.00
$29.25 best
1K agent tasks200K tokens in, 20K out, each.
$3,000.00
$335.00 best
ContextMaximum tokens in one request.
1M
1.05M best
AgenticMulti-step tasks with tools.
71.1 best
70.4
CodingCode writing and repair.
77.7 best
68.8
ReasoningLogic problems and puzzles.
75.8 best
68.1
MultimodalTasks with images and text.
77.9
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KnowledgeFacts and expert knowledge.
77.2 best
67.5
MultilingualTasks in many languages.
—
—
InstructionTasks with strict prompt rules.
74.3
84.4 best
MathMath problems.
77.0 best
68.6

Benchmarks

53 shared
Only Claude Fable 5.1: 79Only Muse Spark 1.3: 6
Claude Fable 5.1
Muse Spark 1.3
59.1% best3 / 222
48.7%15 / 222
85.3% best5 / 217
83.0%18 / 217
29.7% best12 / 214
24.9%21 / 214
100.0% best1 / 200
99.2%19 / 200
93.7% best7 / 199
93.5%8 / 199
68.4% best2 / 164
43.6%41 / 164
62.7% best6 / 133
59.0%10 / 133
90.3% best6 / 123
82.9%23 / 123
63.1% best3 / 114
58.8%14 / 114
Chess PuzzlesReasoning
48.0% best19 / 90
37.0%39 / 90
90.2% best7 / 90
74.0%25 / 90
55.3% best2 / 90
40.9%33 / 90
50.7% best2 / 82
37.9%14 / 82
80.3% best9 / 80
79.6%13 / 80
91.7% best5 / 80
89.7%15 / 80
58.0% best10 / 80
25.0%37 / 80
58.9%8 / 79
58.9%8 / 79
54.6% best11 / 77
27.6%44 / 77
EMBFinance
76.7% best1 / 75
62.7%31 / 75
85.0% best4 / 75
72.3%24 / 75