GPT-6 Astra vs GLM 5.3 FlashX
Detailed technical comparison between GPT-6 Astra (OpenAI) and GLM 5.3 FlashX (Zhipu AI). Review live API token pricing, context window capabilities, time-to-first-token latency, and verified benchmark scores side-by-side.
Comparison Snapshot
GPT-6 Astra
1,050,000 tokensTie
Equal CapabilityTie
Equal SpeedGLM 5.3 FlashX
$0.37 / MTokGPT-6 Astra
GPT-6 Astra is an advanced artificial intelligence model engineered by OpenAI. Tailored for complex multi-step reasoning, programming synthesis, and extended document comprehension, GPT-6 Astra represents a key architectural iteration in the OpenAI model family. First released in 2026-09-04, it serves enterprise developers, research teams, and autonomous system architects requiring strict instruction compliance. Featuring an input capacity of 1,050,000 tokens (approximately 1,400 words), GPT-6 Astra processes multi-file code repositories, lengthy technical reports, and complex prompts in a single inference call.
GLM 5.3 FlashX
GLM 5.3 FlashX is an advanced artificial intelligence model engineered by Zhipu AI. Tailored for complex multi-step reasoning, programming synthesis, and extended document comprehension, GLM 5.3 FlashX represents a key architectural iteration in the Zhipu AI model family. First released in 2026-09-18, it serves enterprise developers, research teams, and autonomous system architects requiring strict instruction compliance. Featuring an input capacity of 1,048,576 tokens (approximately 1,398 words), GLM 5.3 FlashX processes multi-file code repositories, lengthy technical reports, and complex prompts in a single inference call.
Technical Specifications
🏆 = Superior Spec| Specification | GPT-6 Astra | GLM 5.3 FlashX |
|---|---|---|
| Provider | OpenAI | Zhipu AI |
| Context Window | 1,050,000 tokens🏆 | 1,048,576 tokens |
| Agent Suitability | Not yet benchmarked | Not yet benchmarked |
| Time to First Token (TTFT) | No public TTFT data | No public TTFT data |
| Deployment Model | managed api | managed api |
| Production Stability | Beta Access (est.) | Beta Access (est.) |
| API Available | Yes | Yes |
| Released Date | 2026-09-04 | 2026-09-18 |
API Pricing Comparison
Input Price per Million Tokens
GPT-6 Astra
$10.00
GLM 5.3 FlashX
$0.37
Output Price per Million Tokens
GPT-6 Astra
$50.00
GLM 5.3 FlashX
$1.25
💡 Cost Ratio: GLM 5.3 FlashX is 27.0x cheaper per input token than GPT-6 Astra.
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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-6 Astra Quirks & Gotchas
No developer gotchas reported.
GLM 5.3 FlashX Quirks & Gotchas
No developer gotchas reported.
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