GLM-5.3 vs Grok 4.6
Both are Flagship-tier models, from Z.ai and xAI respectively. GLM-5.3 is the cheaper choice overall at a 4:1 input:output ratio.
Which is cheaper
Side by side
| Spec | GLM-5.3 | Grok 4.6 |
|---|---|---|
| Provider | Z.ai | xAI |
| Tier | Flagship | Flagship |
| Context window | 1M | 500K |
| Max output | 128K | — |
| Input $/1M | $1.40 | $2.00 |
| Output $/1M | $4.40 | $6.00 |
| Cache read $/1M | $0.26 | $0.50 |
| Modalities | text | text, image |
GLM-5.3. Latest flagship text model, per 1M tokens. Context window not stated on pricing page.
Grok 4.6. Short-context rate, for prompts under 200K tokens. At 200K and above: $4 input / $12 output, cache read $1 per 1M. xAI's Priority Processing tier doubles every rate and applies to all models — it is not a separate model.
Sources
GLM-5.3 — verified August 29, 2026