Claude 5.5 SonnetvsLTX-2.3 Fast

Claude 5.5 Sonnet leads the overall Podium Score by 8.6 points (94.8 vs 86.2).Category wins: Claude 5.5 Sonnet 7 — 0 LTX-2.3 Fast.LTX-2.3 Fast is the cheaper pick ($0.05/M vs $15/M per 1M output tokens). Claude 5.5 Sonnet is faster (94 t/s vs 60 t/s).

Open in Compare Tool →View Claude 5.5 SonnetView LTX-2.3 Fast
Claude 5.5 SonnetDrag 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
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 86.2 for LTX-2.3 Fast). In head-to-head domain evaluations, Claude 5.5 Sonnet outperforms in 7 of 7 benchmark categories.

Coding & Engineering
Claude 5.5 Sonnet (91.5)
Inference Speed
Claude 5.5 Sonnet (94 t/s)
Cost Efficiency
LTX-2.3 Fast ($0.05/M)
API Price / 1M (in · out)
Claude 5.5 Sonnet $3/M · $15/M — LTX-2.3 Fast $0.05/M · $0.05/M

Choose Claude 5.5 Sonnet for long documents and large codebases, and LTX-2.3 Fast for cost-sensitive workloads.

MetricClaude 5.5 SonnetLTX-2.3 Fast
Podium Score94.8 ▲86.2
Arena Elo1520 ▲1385
Intelligence Index95.0 ▲86.0
Coding91.5 ▲0.0
Math94.2 ▲0.0
Reasoning95.0 ▲30.0
Agentic89.4 ▲20.0
Knowledge88.0 ▲45.0
Multimodal96.0 ▲93.0
Long-context98.0 ▲35.0
Output speed94 t/s ▲60 t/s
Output price$15/M$0.05/M ▲
Context window1000K ▲64K
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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