FLUX.2 Klein 9BvsClaude Opus 5

FLUX.2 Klein 9B leads the overall Podium Score by 6.8 points (88.2 vs 81.4).Category wins: FLUX.2 Klein 9B 1 — 3 Claude Opus 5.FLUX.2 Klein 9B is the cheaper pick ($0.02/M vs $25/M per 1M output tokens). Claude Opus 5 is faster (60 t/s vs 55 t/s).

Open in Compare Tool →View FLUX.2 Klein 9BView Claude Opus 5
FLUX.2 Klein 9BDrag slider or hover to compareClaude Opus 5
Claude Opus 5
81.4
Coding: 70.4 · Speed: 60 t/s
Output Price: $25/M
FLUX.2 Klein 9B
88.2
Coding: 0.0 · Speed: 55 t/s
Output Price: $0.02/M
Quick VerdictAggregated 2026 Benchmark Analysis

FLUX.2 Klein 9B is rated higher overall with a Podium Score of 88.2 (vs 81.4 for Claude Opus 5). In head-to-head domain evaluations, Claude Opus 5 outperforms in 3 of 7 benchmark categories.

Coding & Engineering
Claude Opus 5 (70.4)
Inference Speed
Claude Opus 5 (60 t/s)
Cost Efficiency
FLUX.2 Klein 9B ($0.02/M)
API Price / 1M (in · out)
FLUX.2 Klein 9B $0.02/M · $0.02/M — Claude Opus 5 $5/M · $25/M

Choose FLUX.2 Klein 9B for knowledge and factual QA, and Claude Opus 5 for long documents and large codebases.

MetricFLUX.2 Klein 9BClaude Opus 5
Podium Score88.2 ▲81.4
Arena Elo14051492 ▲
Intelligence Index88.0 ▲61.0
Coding0.070.4 ▲
Math0.0—
Reasoning32.082.3 ▲
Agentic22.0—
Knowledge50.0 ▲37.1
Multimodal94.0—
Long-context45.099.2 ▲
Output speed55 t/s60 t/s ▲
Output price$0.02/M ▲$25/M
Context window64K1000K ▲
Scores aggregated from five independent leaderboards. See Methodology. More head-to-heads: FLUX.2 Klein 9B vs Claude Mythos · FLUX.2 Klein 9B vs Claude 5.5 Sonnet · FLUX.2 Klein 9B vs Kimi K3.1 Pro · FLUX.2 Klein 9B vs Eleven Multilingual v3
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