Grok 4.5 vs GLM 5.3 Flash
Side-by-side comparison using current list prices and the live leaderboard.
Verdict
GLM 5.3 Flash is 50x cheaper per input token.
- Grok 4.5 is #114 on the LMRank leaderboard; GLM 5.3 Flash is not ranked yet.
- GLM 5.3 Flash is 50x cheaper per input token ($0.04 vs $2.00 per 1M).
- GLM 5.3 Flash has the larger context window (1.3M vs 500K tokens).
At a Glance
| Attribute | Grok 4.5 | GLM 5.3 Flash |
|---|---|---|
| Lab | xAI | Z.ai |
| Leaderboard rank | #114 | Not ranked yet |
| Tags | Intelligent | Long Context Coding Intelligent Fast Agentic |
| Context | 500K tokens | 1.3M tokens |
| Input price | $2.00/1M | $0.04/1M |
| Output price | $6.00/1M | $0.50/1M |
| Input modalities | Text, image, and file | Text, image, and video |
| Output modalities | Text | Text |
Grok 4.5: strengths
- Supports text and image input with text output
- 488K-token context window for long documents
- Tool-use support for agentic workflows
- Structured output support for reliable application integration
GLM 5.3 Flash: strengths
- Low-cost model for coding and agent tasks
- 1.31M-token context window
- Hybrid sparse and linear attention architecture
Grok 4.5: weaknesses
- Newer listing with limited independent benchmark coverage
- Multimodal performance may vary by provider endpoint
GLM 5.3 Flash: weaknesses
- Flash tier trades capability for lower cost
- New release with limited public evaluation
Grok 4.5: best for
- Agentic workflows and tool-using applications
- Multimodal document and screenshot analysis
- Long-context document and codebase processing
GLM 5.3 Flash: best for
- Budget coding assistants
- Long-context agents
- High-volume automation