Claude Fable 5.1vsFLUX.2 Klein 9B

Claude Fable 5.1 leads the overall Podium Score by 0.2 points (88.4 vs 88.2).Category wins: Claude Fable 5.1 3 — 1 FLUX.2 Klein 9B.FLUX.2 Klein 9B is the cheaper pick ($0.02/M vs $15/M per 1M output tokens). Claude Fable 5.1 is faster (85 t/s vs 55 t/s).

Open in Compare Tool →View Claude Fable 5.1View FLUX.2 Klein 9B
Claude Fable 5.1Drag slider or hover to compareFLUX.2 Klein 9B
FLUX.2 Klein 9B
88.2
Coding: 0.0 · Speed: 55 t/s
Output Price: $0.02/M
Claude Fable 5.1
88.4
Coding: 95.5 · Speed: 85 t/s
Output Price: $15/M
Quick VerdictAggregated 2026 Benchmark Analysis

Claude Fable 5.1 is rated higher overall with a Podium Score of 88.4 (vs 88.2 for FLUX.2 Klein 9B). In head-to-head domain evaluations, Claude Fable 5.1 outperforms in 3 of 7 benchmark categories.

Coding & Engineering
Claude Fable 5.1 (95.5)
Inference Speed
Claude Fable 5.1 (85 t/s)
Cost Efficiency
FLUX.2 Klein 9B ($0.02/M)
API Price / 1M (in · out)
Claude Fable 5.1 $3/M · $15/M — FLUX.2 Klein 9B $0.02/M · $0.02/M

Choose Claude Fable 5.1 for coding and software engineering, and FLUX.2 Klein 9B for vision and multimodal apps.

MetricClaude Fable 5.1FLUX.2 Klein 9B
Podium Score88.4 ▲88.2
Arena Elo—1405
Intelligence Index—88.0
Coding95.5 ▲0.0
Math—0.0
Reasoning92.0 ▲32.0
Agentic—22.0
Knowledge58.0 ▲50.0
Multimodal62.094.0 ▲
Long-context—45.0
Output speed85 t/s ▲55 t/s
Output price$15/M$0.02/M ▲
Context window500K ▲64K
Scores aggregated from five independent leaderboards. See Methodology. More head-to-heads: Claude Fable 5.1 vs Claude Mythos · Claude Fable 5.1 vs Claude 5.5 Sonnet · Claude Fable 5.1 vs Kimi K3.1 Pro · Claude Fable 5.1 vs Eleven Multilingual v3
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