GLM 5.1 vs Grok 4 20 Non Reasoning
API pricing, context window and capabilities for GLM 5.1 and Grok 4 20 Non Reasoning, side by side. Prices are the cheapest serving route per 1M tokens, verified against LiteLLM and OpenRouter.
Verdict
computed from the published numbersGLM 5.1 wins on price and on intelligence. Grok 4 20 Non Reasoning wins on context window. Benchmark data is unavailable for one or both models.
Price
GLM 5.1
Coding
Not called
Intelligence
GLM 5.1
Context window
Grok 4 20 Non Reasoning
Key takeaways
who wins on what, from the published numbersGLM 5.1 wins
- Cheaper input ($1.05 vs $2.00 /1M)
- Cheaper output ($3.50 vs $6.00 /1M)
- More serving providers (2 vs 1)
- Has reasoning mode
- Supports prompt caching
Grok 4 20 Non Reasoning wins
- Larger context window (203K vs 2M)
- Higher max output (128K vs 2M)
- Supports vision
- Supports structured output
- Has web search
Cheaper overall
GLM 5.1
$1.05 + $3.50 /1M
Larger context
Grok 4 20 Non Reasoning
2M
More providers
GLM 5.1
2 providers
Pricing & specs
cheapest serving route · per 1M tokens| GLM 5.1 | Grok 4 20 Non Reasoning | |
|---|---|---|
| Input $/1M | $1.05 best | $2.00 |
| Output $/1M | $3.50 best | $6.00 |
| Context window | 203K | 2M best |
| Max output | 128K | 2M best |
| Serving providers | 2 best | 1 |
| Released | 2026-04-07 | 2026-03-09 |
Benchmarks
Artificial Analysis indices, side by side| GLM 5.1 | Grok 4 20 Non Reasoning | |
|---|---|---|
| Intelligence | 40.2 best | 21.8 |
| Coding | 55.8 | Not available |
| GPQA Diamond | 87% best | 78% |
| Output speed | 91 t/s | 163 t/s best |
| Latency (TTFT) | 10.49s | 4.54s best |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
GLM 5.1
via OpenRouter
$8.75
Grok 4 20 Non Reasoning
via Vertex AI
$16
Capabilities
feature support, side by side| Feature | GLM 5.1 | Grok 4 20 Non Reasoning |
|---|---|---|
| Vision | — | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | — |
| Audio | — | — |
| Prompt caching | ✓ | — |
| Structured output | — | ✓ |
| Web search | — | ✓ |
Related comparisons
Frequently asked questions
Which is cheaper, GLM 5.1 or Grok 4 20 Non Reasoning?
GLM 5.1 is cheaper for input ($1.05 vs $2.00 per 1M tokens). GLM 5.1 is cheaper for output ($3.50 vs $6.00 per 1M tokens).
What is the context window difference between GLM 5.1 and Grok 4 20 Non Reasoning?
GLM 5.1 has a 203K-token context window and Grok 4 20 Non Reasoning has 2M tokens, so Grok 4 20 Non Reasoning can take a larger prompt.
How do GLM 5.1 and Grok 4 20 Non Reasoning compare on benchmarks?
On the tracked Artificial Analysis indices, GLM 5.1 leads on intelligence.
Pricing verified against LiteLLM + OpenRouter + provider pages · refreshed daily
Every weekday
AI moves fast. Here's your debrief.
News, analysis, tools, and more.
For people who build with AI