Grok 4.20 vs GLM 5.2
Detailed technical comparison between Grok 4.20 (xAI) 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
Grok 4.20
2,000,000 tokensTie
Equal CapabilityTie
Equal SpeedGLM 5.2
$0.80 / MTokGrok 4.20
Grok 4.20 is xAI's most advanced reasoning model, combining powerful analytical capabilities with unique real-time integration to the X (formerly Twitter) platform data stream. This live data access allows Grok 4.20 to answer queries with up-to-the-minute context, making it invaluable for financial analysis, current events research, and real-time market monitoring. Exceptionally strong in physics, advanced mathematics, and code synthesis, it operates with a 2-million-token context window and is priced at $1.25/MTok for input — delivering frontier-tier reasoning at a highly competitive cost for developers building intelligent agents and analytical tools.
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 | Grok 4.20 | GLM 5.2 |
|---|---|---|
| Provider | xAI | Zhipu AI |
| Context Window | 2,000,000 tokens🏆 | 1,048,576 tokens |
| Agent Suitability | 90/100 | N/A |
| Time to First Token (TTFT) | 350 ms | N/A |
| Deployment Model | managed api | managed api |
| Production Stability | stable | beta |
| API Available | Yes | Yes |
| Released Date | 2026-05-05 | 2026-06-16 |
API Pricing Comparison
Input Price per Million Tokens
Grok 4.20
$1.25
GLM 5.2
$0.80
Output Price per Million Tokens
Grok 4.20
$2.50
GLM 5.2
$2.52
💡 Cost Ratio: GLM 5.2 is 1.6x cheaper per input token than Grok 4.20.
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.
Grok 4.20 Quirks & Gotchas
- ▸Real-time X data access — unparalleled for current events / financial analysis
- ▸Tool calling API is still maturing — test thoroughly for production agentic use
GLM 5.2 Quirks & Gotchas
No developer gotchas reported.
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