Kimi K3.1 ProvsFLUX.2 Klein 4B

Kimi K3.1 Pro leads the overall Podium Score by 7.7 points (94.2 vs 86.5).Category wins: Kimi K3.1 Pro 7 — 0 FLUX.2 Klein 4B.FLUX.2 Klein 4B is the cheaper pick ($0.01/M vs $20/M per 1M output tokens). FLUX.2 Klein 4B is faster (90 t/s vs 45 t/s).

Open in Compare Tool →View Kimi K3.1 ProView FLUX.2 Klein 4B
Kimi K3.1 ProDrag slider or hover to compareFLUX.2 Klein 4B
FLUX.2 Klein 4B
86.5
Coding: 0.0 · Speed: 90 t/s
Output Price: $0.01/M
Kimi K3.1 Pro
94.2
Coding: 72.0 · Speed: 45 t/s
Output Price: $20/M
Quick VerdictAggregated 2026 Benchmark Analysis

Kimi K3.1 Pro is rated higher overall with a Podium Score of 94.2 (vs 86.5 for FLUX.2 Klein 4B). In head-to-head domain evaluations, Kimi K3.1 Pro outperforms in 7 of 7 benchmark categories.

Coding & Engineering
Kimi K3.1 Pro (72.0)
Inference Speed
FLUX.2 Klein 4B (90 t/s)
Cost Efficiency
FLUX.2 Klein 4B ($0.01/M)
API Price / 1M (in · out)
Kimi K3.1 Pro $4/M · $20/M — FLUX.2 Klein 4B $0.01/M · $0.01/M

Choose Kimi K3.1 Pro for long documents and large codebases, and FLUX.2 Klein 4B for cost-sensitive workloads.

MetricKimi K3.1 ProFLUX.2 Klein 4B
Podium Score94.2 ▲86.5
Arena Elo1490 ▲1380
Intelligence Index68.087.0 ▲
Coding72.0 ▲0.0
Math95.0 ▲0.0
Reasoning98.0 ▲25.0
Agentic82.0 ▲18.0
Knowledge45.0 ▲42.0
Multimodal96.0 ▲90.0
Long-context100.0 ▲35.0
Output speed45 t/s90 t/s ▲
Output price$20/M$0.01/M ▲
Context window1000K ▲32K
Scores aggregated from five independent leaderboards. See Methodology. More head-to-heads: Kimi K3.1 Pro vs Claude Mythos · Kimi K3.1 Pro vs Claude 5.5 Sonnet · Kimi K3.1 Pro vs Eleven Multilingual v3 · Kimi K3.1 Pro vs FLUX.2 Pro
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