Key Takeaways
GPT-5.2 Pro wins:
- Larger context window
- Faster response time
- Higher intelligence benchmark
- Better at coding
- Better at math
GLM 4.6V wins:
- Cheaper input tokens
- Cheaper output tokens
Price Advantage
GLM 4.6V
Benchmark Advantage
GPT-5.2 Pro
Context Window
GPT-5.2 Pro
Speed
GPT-5.2 Pro
Pricing Comparison
Price Comparison
| Metric | GPT-5.2 Pro | GLM 4.6V | Winner |
|---|---|---|---|
| Input (per 1M tokens) | $10.50 | $0.30 | GLM 4.6V |
| Output (per 1M tokens) | $84.00 | $0.90 | GLM 4.6V |
| Cache Read (per 1M) | N/A | $0.05 | GLM 4.6V |
Using a 3:1 input/output ratio, GLM 4.6V is 98% cheaper overall.
GPT-5.2 Pro Providers
No provider data available
GLM 4.6V Providers
No provider data available
Benchmark Comparison
6
Benchmarks Compared
6
GPT-5.2 Pro Wins
0
GLM 4.6V Wins
Benchmark Scores
| Benchmark | GPT-5.2 Pro | GLM 4.6V | Winner |
|---|---|---|---|
Intelligence Index Overall intelligence score | 51.3 | 17.1 | |
Coding Index Code generation & understanding | 48.7 | 11.1 | |
Math Index Mathematical reasoning | 99.0 | 26.3 | |
MMLU Pro Academic knowledge | 87.4 | 75.2 | |
GPQA Graduate-level science | 90.3 | 56.6 | |
LiveCodeBench Competitive programming | 88.9 | 41.1 |
GPT-5.2 Pro significantly outperforms in coding benchmarks.
Cost vs Quality
X-axis:
Y-axis:
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GPT-5.2 Pro
Other models
Context & Performance
Context Window
GPT-5.2 Pro
400,000
tokens
GLM 4.6V
131,072
tokens
GPT-5.2 Pro has a 67% larger context window.
Speed Performance
| Metric | GPT-5.2 Pro | GLM 4.6V | Winner |
|---|---|---|---|
| Tokens/second | 75.3 tok/s | 22.9 tok/s | |
| Time to First Token | 74.91s | 4.51s |
GPT-5.2 Pro responds 229% faster on average.
Capabilities
Feature Comparison
| Feature | GPT-5.2 Pro | GLM 4.6V |
|---|---|---|
| Vision (Image Input) | ||
| Tool/Function Calls | ||
| Reasoning Mode | ||
| Audio Input | ||
| Audio Output | ||
| PDF Input | ||
| Prompt Caching | ||
| Web Search |
License & Release
| Property | GPT-5.2 Pro | GLM 4.6V |
|---|---|---|
| License | Proprietary | Open Source |
| Author | OpenAI | Z-ai |
| Released | Dec 2025 | Dec 2025 |
GPT-5.2 Pro Modalities
Input
imagetextfile
Output
text
GLM 4.6V Modalities
Input
imagetextvideo
Output
text