GLM-5.3 Flash vs GPT-6 Astra: Specs & Benchmark Comparison
| Characteristic | GLM-5.3 Flash | GPT-6 Astra |
|---|---|---|
| Company | Zhipu AI | OpenAI |
| Release Date | August 26, 2026 | September 3, 2026 |
| Parameters | 320B | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | 1.1M |
| Context (output) | 131K | 128K |
| Input Price / 1M | $0.15 | $10.00 |
| Output Price / 1M | $0.50 | $50.00 |
| Average Score | 0.6 | 0.7 |
| Benchmarks | ||
| Agents' Last Exam | 0.3 | 0.6 |
| DeepSWE 1.1 | 0.6 | 0.7 |
| AutomationBench v1.0.6 | 0.5 | 0.4 |
Visual Benchmark Comparison
GLM-5.3 Flash
GPT-6 Astra
Agents' Last Exam0.3 vs 0.6
0.3
0.6
DeepSWE 1.10.6 vs 0.7
0.6
0.7
AutomationBench v1.0.60.5 vs 0.4
0.5
0.4
Verdict
Both models show equal results — the choice depends on your specific use case.
Overall Performance
Both models show comparable average scores: GLM-5.3 Flash — 0.6, GPT-6 Astra — 0.7.
API Cost
GLM-5.3 Flash is 92.3x cheaper: input $0.15/1M vs $10.00/1M tokens.
Context Window
GPT-6 Astra supports a larger context: 1M vs 1M tokens.
Recency
Both models were released around the same time: 8/26/2026 and 9/3/2026.
More About These Models
Related Comparisons
Frequently Asked Questions
Which is better for coding — GLM-5.3 Flash or GPT-6 Astra?
Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.
Which model is cheaper — GLM-5.3 Flash or GPT-6 Astra?
GLM-5.3 Flash is cheaper for input: $0.15 per 1M tokens vs $10.00.
Which has a larger context window — GLM-5.3 Flash or GPT-6 Astra?
GPT-6 Astra supports a larger context: 1,050,000 tokens vs 1,048,576.
The GLM-5.3 Flash and GPT-6 Astra 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 Flash or GPT-6 Astra page. See also the complete list of AI model comparisons.