FLUX.2 Klein 4BvsLTX-2.3 Fast

FLUX.2 Klein 4B leads the overall Podium Score by 0.3 points (86.5 vs 86.2).Category wins: FLUX.2 Klein 4B 0 — 4 LTX-2.3 Fast.FLUX.2 Klein 4B is the cheaper pick ($0.01/M vs $0.05/M per 1M output tokens). FLUX.2 Klein 4B is faster (90 t/s vs 60 t/s).

Open in Compare Tool →View FLUX.2 Klein 4BView LTX-2.3 Fast
FLUX.2 Klein 4BDrag slider or hover to compareLTX-2.3 Fast
LTX-2.3 Fast
86.2
Coding: 0.0 · Speed: 60 t/s
Output Price: $0.05/M
FLUX.2 Klein 4B
86.5
Coding: 0.0 · Speed: 90 t/s
Output Price: $0.01/M
Quick VerdictAggregated 2026 Benchmark Analysis

FLUX.2 Klein 4B is rated higher overall with a Podium Score of 86.5 (vs 86.2 for LTX-2.3 Fast). In head-to-head domain evaluations, LTX-2.3 Fast outperforms in 4 of 7 benchmark categories.

Coding & Engineering
FLUX.2 Klein 4B (0.0)
Inference Speed
FLUX.2 Klein 4B (90 t/s)
Cost Efficiency
FLUX.2 Klein 4B ($0.01/M)
API Price / 1M (in · out)
FLUX.2 Klein 4B $0.01/M · $0.01/M — LTX-2.3 Fast $0.05/M · $0.05/M

Choose FLUX.2 Klein 4B for cost-sensitive workloads, and LTX-2.3 Fast for vision and multimodal apps.

MetricFLUX.2 Klein 4BLTX-2.3 Fast
Podium Score86.5 ▲86.2
Arena Elo13801385 ▲
Intelligence Index87.0 ▲86.0
Coding0.00.0
Math0.00.0
Reasoning25.030.0 ▲
Agentic18.020.0 ▲
Knowledge42.045.0 ▲
Multimodal90.093.0 ▲
Long-context35.035.0
Output speed90 t/s ▲60 t/s
Output price$0.01/M ▲$0.05/M
Context window32K64K ▲
Scores aggregated from five independent leaderboards. See Methodology. More head-to-heads: FLUX.2 Klein 4B vs Claude Mythos · FLUX.2 Klein 4B vs Claude 5.5 Sonnet · FLUX.2 Klein 4B vs Kimi K3.1 Pro · FLUX.2 Klein 4B vs Eleven Multilingual v3
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