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Claude Sonnet 4.6 vs GLM-5.2 — Price, Context, and Capability Compared

Verdict

Claude Sonnet 4.6 costs 2.8× more per blended million tokens than GLM-5.2. GLM-5.2 has the larger context window (1,000,000 tokens). Default to GLM-5.2 unless you specifically need Claude Sonnet 4.6's edge.

Spec comparison

Claude Sonnet 4.6GLM-5.2
Price (input)$3.00/M$1.40/M
Price (output)$15.00/M$4.40/M
Blended price$6.00/M$2.15/M
Context window300,000 tokens1,000,000 tokens
Max output64,000 tokens64,000 tokens
Modalitiestext, visiontext
Reasoning modeYesYes
Released2026-032026-05
Speed76 t/sNot measured

Cost at scale (3:1 blended)

Tokens / monthClaude Sonnet 4.6GLM-5.2Delta
1,000,000$6.00$2.15$3.85 (2.8×)
10,000,000$60.00$21.50$38.50 (2.8×)
100,000,000$600.00$215.00$385.00 (2.8×)

Choose Claude Sonnet 4.6 if…

  • Best intelligence-per-dollar in the Claude lineup
  • Fast enough for interactive coding agents
  • Reliable structured output
  • Enterprise workloads that need Opus-adjacent quality at Sonnet pricing.

Choose GLM-5.2 if…

  • Open-weights coding-first flagship
  • 1M-token context window
  • Beats larger frontier models on long-horizon coding
  • Long-horizon coding on open weights at a fraction of frontier pricing.

Run this exact matchup right now

Send the same prompt to Claude Sonnet 4.6 and GLM-5.2 side by side and see the outputs yourself.

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FAQ

Is Claude Sonnet 4.6 cheaper than GLM-5.2?

GLM-5.2 is cheaper, at $2.15 per million blended tokens vs $6.00 for Claude Sonnet 4.6.

Which has the bigger context window, Claude Sonnet 4.6 or GLM-5.2?

GLM-5.2 has the larger context window: 1,000,000 tokens vs 300,000.

Can Claude Sonnet 4.6 replace GLM-5.2 for coding?

Both are viable for coding. Best intelligence-per-dollar in the Claude lineup (Claude Sonnet 4.6) vs Open-weights coding-first flagship (GLM-5.2) — pick based on which strength matters more for your workload.

Related

Claude Sonnet 4.6 pricingGLM-5.2 pricingvs Grok 4.3vs Gemini 3.1 Provs Claude Sonnet 4vs Claude Sonnet 4.5Premium model tests

Pricing verified 2026-04-06. Specs verified 2026-08-08.