Claude 5.5 SonnetvsKimi K3.1 Highspeed

Claude 5.5 Sonnet leads the overall Podium Score by 3.3 points (94.8 vs 91.5).Category wins: Claude 5.5 Sonnet 6 — 0 Kimi K3.1 Highspeed.Kimi K3.1 Highspeed is the cheaper pick ($8/M vs $15/M per 1M output tokens). Kimi K3.1 Highspeed is faster (130 t/s vs 94 t/s).

Open in Compare Tool →View Claude 5.5 SonnetView Kimi K3.1 Highspeed
Claude 5.5 SonnetDrag slider or hover to compareKimi K3.1 Highspeed
Kimi K3.1 Highspeed
91.5
Coding: 60.0 · Speed: 130 t/s
Output Price: $8/M
Claude 5.5 Sonnet
94.8
Coding: 91.5 · Speed: 94 t/s
Output Price: $15/M
Quick VerdictAggregated 2026 Benchmark Analysis

Claude 5.5 Sonnet is rated higher overall with a Podium Score of 94.8 (vs 91.5 for Kimi K3.1 Highspeed). In head-to-head domain evaluations, Claude 5.5 Sonnet outperforms in 6 of 7 benchmark categories.

Coding & Engineering
Claude 5.5 Sonnet (91.5)
Inference Speed
Kimi K3.1 Highspeed (130 t/s)
Cost Efficiency
Kimi K3.1 Highspeed ($8/M)
API Price / 1M (in · out)
Claude 5.5 Sonnet $3/M · $15/M — Kimi K3.1 Highspeed $1.5/M · $8/M

Choose Claude 5.5 Sonnet for vision and multimodal apps, and Kimi K3.1 Highspeed for cost-sensitive workloads.

MetricClaude 5.5 SonnetKimi K3.1 Highspeed
Podium Score94.8 ▲91.5
Arena Elo1520 ▲1455
Intelligence Index95.0 ▲60.0
Coding91.5 ▲60.0
Math94.2 ▲88.0
Reasoning95.0 ▲92.0
Agentic89.4 ▲74.0
Knowledge88.0 ▲38.0
Multimodal96.0 ▲90.0
Long-context98.098.0
Output speed94 t/s130 t/s ▲
Output price$15/M$8/M ▲
Context window1000K1000K
Scores aggregated from five independent leaderboards. See Methodology. More head-to-heads: Claude 5.5 Sonnet vs Claude Mythos · Claude 5.5 Sonnet vs Kimi K3.1 Pro · Claude 5.5 Sonnet vs Eleven Multilingual v3 · Claude 5.5 Sonnet vs FLUX.2 Pro
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