GLM-5.3 vs Grok 4.5: Specs & Benchmark Comparison
GLM-5.3 is developed by Zhipu AI, while Grok 4.5 comes from xAI. Grok 4.5 was released in July 2026, and GLM-5.3 followed a month later in August 2026. GLM-5.3 has a published size of about 753 billion parameters; xAI has not disclosed the parameter count of Grok 4.5.
The two models share 4 published benchmarks. GLM-5.3 leads on 4 of them. The widest gaps are on Terminal-Bench 4.0, where GLM-5.3 scores 41.8% against 12.4%; SWE-Marathon, where GLM-5.3 scores 42.5% against 29.0%. Averaged across everything we track, GLM-5.3 sits at 52.2% and Grok 4.5 at 52.9%.
GLM-5.3 is the cheaper API at $1.40 per million input tokens and $4.40 per million output tokens, about 43% below Grok 4.5 at $2 and $6. GLM-5.3 takes the larger context window at 1M tokens, compared with 500K for Grok 4.5. GLM-5.3 accepts text as input, while Grok 4.5 accepts text and images.
| Characteristic | GLM-5.3 | Grok 4.5 |
|---|---|---|
| Company | Zhipu AI | xAI |
| Release Date | August 14, 2026 | July 16, 2026 |
| Parameters | 753B | — |
| Multimodal | No | Yes |
| Context (input) | 1.0M | 500K |
| Context (output) | 131K | — |
| Input Price / 1M | $1.40 | $2.00 |
| Output Price / 1M | $4.40 | $6.00 |
| Average Score | 52.2% | 52.9% |
| Benchmarks | ||
| Terminal-Bench 4.0 | 41.8% | 12.4% |
| SWE-Marathon | 42.5% | 29.0% |
| DeepSWE 1.1 | 66.9% | 54.0% |
| Terminal-Bench 2.1 | 88.0% | 83.0% |
Visual Benchmark Comparison
Verdict
GLM-5.3 leads in 3 out of 4 comparison categories.
Both models show comparable average scores: GLM-5.3 — 0.5, Grok 4.5 — 0.5.
GLM-5.3 is 1.4x cheaper: input $1.40/1M vs $2.00/1M tokens.
GLM-5.3 supports a larger context: 1M vs 500K tokens.
GLM-5.3 is newer: released 8/14/2026 vs 7/16/2026.
More About These Models
Related Comparisons
Frequently Asked Questions
Which is better for coding — GLM-5.3 or Grok 4.5?
Which model is cheaper — GLM-5.3 or Grok 4.5?
Which has a larger context window — GLM-5.3 or Grok 4.5?
The GLM-5.3 and Grok 4.5 comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the GLM-5.3 or Grok 4.5 page. See also the complete list of AI model comparisons.