Claude Mythos PreviewvsGLM-4.5 Air

Claude Mythos Preview leads the overall Podium Score by 8.5 points (97.4 vs 88.9).Category wins: Claude Mythos Preview 5 — 0 GLM-4.5 Air.GLM-4.5 Air is the cheaper pick ($1.1/M vs $15/M per 1M output tokens). GLM-4.5 Air is faster (96 t/s vs 80 t/s).

Open in Compare Tool →View Claude MythosView GLM-4.5 Air
Claude Mythos PreviewDrag slider or hover to compareGLM-4.5 Air
GLM-4.5 Air
88.9
Coding: 55.0 · Speed: 96 t/s
Output Price: $1.1/M
Claude Mythos Preview
97.4
Coding: 80.9 · Speed: 80 t/s
Output Price: $15/M
Quick VerdictAggregated 2026 Benchmark Analysis

Claude Mythos Preview is rated higher overall with a Podium Score of 97.4 (vs 88.9 for GLM-4.5 Air). In head-to-head domain evaluations, Claude Mythos Preview outperforms in 5 of 7 benchmark categories.

Coding & Engineering
Claude Mythos Preview (80.9)
Inference Speed
GLM-4.5 Air (96 t/s)
Cost Efficiency
GLM-4.5 Air ($1.1/M)
API Price / 1M (in · out)
Claude Mythos $3/M · $15/M — GLM-4.5 Air $0.2/M · $1.1/M

Choose Claude Mythos Preview for math and quantitative work, and GLM-4.5 Air for cost-sensitive workloads.

MetricClaude Mythos PreviewGLM-4.5 Air
Podium Score97.4 ▲88.9
Arena Elo—1420
Intelligence Index—58.0
Coding80.9 ▲55.0
Math100.0 ▲82.0
Reasoning98.8 ▲90.0
Agentic—62.0
Knowledge100.0 ▲40.0
Multimodal100.0 ▲70.0
Long-context—72.0
Output speed80 t/s96 t/s ▲
Output price$15/M$1.1/M ▲
Context window1000K ▲131K
Scores aggregated from five independent leaderboards. See Methodology. More head-to-heads: Claude Mythos vs Claude 5.5 Sonnet · Claude Mythos vs Kimi K3.1 Pro · Claude Mythos vs Eleven Multilingual v3 · Claude Mythos vs FLUX.2 Pro
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