GPT-5 vs GLM 5.2
Detailed technical comparison between GPT-5 (OpenAI) and GLM 5.2 (Zhipu AI). Review live API token pricing, context window capabilities, time-to-first-token latency, and verified benchmark scores side-by-side.
Comparison Snapshot
GLM 5.2
1,048,576 tokensTie
Equal CapabilityTie
Equal SpeedGLM 5.2
$0.80 / MTokGPT-5
GPT-5 is OpenAI’s most advanced model, offering major improvements in reasoning, code quality, and user experience. It is optimized for complex tasks that require step-by-step reasoning, instruction following, and accuracy...
GLM 5.2
GLM 5.2 is a large-scale reasoning model from Z.ai. It supports text input and output with a 1M-token context window, and is suited for long-horizon agent workflows, project-level software engineering,...
Technical Specifications
🏆 = Superior Spec| Specification | GPT-5 | GLM 5.2 |
|---|---|---|
| Provider | OpenAI | Zhipu AI |
| Context Window | 400,000 tokens | 1,048,576 tokens🏆 |
| Agent Suitability | 92/100 | N/A |
| Time to First Token (TTFT) | 320 ms | N/A |
| Deployment Model | managed api | managed api |
| Production Stability | stable | beta |
| API Available | Yes | Yes |
| Released Date | 2025-08-07 | 2026-06-16 |
API Pricing Comparison
Input Price per Million Tokens
GPT-5
$1.25
GLM 5.2
$0.80
Output Price per Million Tokens
GPT-5
$10.00
GLM 5.2
$2.50
💡 Cost Ratio: GLM 5.2 is 1.6x cheaper per input token than GPT-5.
Want to test both models live?
Run side-by-side prompt benchmarks in our dynamic multi-model Sandbox. Compare execution speeds, latency metrics, and compute actual costs in real-time.
Benchmark Performance Metrics
Standardized Scores (0–100%)Scores show verified raw accuracy percentages across standardized AI evaluation suites. Higher bars indicate superior performance in that domain.
GPT-5 Quirks & Gotchas
- ▸Reliable all-rounder — use as default for most production workflows
- ▸Not recommended for advanced reasoning chains — use o3-mini instead
GLM 5.2 Quirks & Gotchas
No developer gotchas reported.
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