Real data comparison
Z.ai: GLM 5.3 Flash (batch) vs OpenAI: GPT-5.6 Luna (batch)
On quality, Z.ai: GLM 5.3 Flash (batch) leads (41.9 vs 37.5). On price, Z.ai: GLM 5.3 Flash (batch) is cheaper ($0.12 vs $0.45 per 1M). In real production usage, Z.ai: GLM 5.3 Flash (batch) is used more (rank #5 vs #7 of 325). Across 25 real task categories where both models have classified traffic, OpenAI: GPT-5.6 Luna (batch) handles more of the traffic in 17 of them.
- Z.ai: GLM 5.3 Flash (batch)
- OpenAI: GPT-5.6 Luna (batch)
Head-to-head by real task
Z.ai: GLM 5.3 Flash (batch) leads 8 of 25 shared task categories by real classified traffic share; OpenAI: GPT-5.6 Luna (batch) leads 17. Not a benchmark score - this is what developers actually route to each model for, per OpenRouter's task classification.
| Task | Z.ai: GLM 5.3 Flash (batch) | OpenAI: GPT-5.6 Luna (batch) |
|---|---|---|
| Tool Dispatch | 3.2% | 63.1% |
| Data Transformation | 9.0% | 40.6% |
| DevOps & Config | 11.8% | 37.6% |
| Repo Scanning | 9.4% | 23.7% |
| Translation | 10.2% | 22.4% |
| Frontend & UI | 18.2% | 7.7% |
| Math | 12.6% | 2.4% |
| Debugging | 11.1% | 20.6% |
| Code Generation | 15.8% | 25.2% |
| Research & Reports | 14.5% | 5.3% |
| DevOps | 13.9% | 6.3% |
| Customer Support | 2.0% | 9.1% |
| Data Extraction | 4.4% | 10.5% |
| Code Review | 15.8% | 21.1% |
| SQL & Database | 7.9% | 12.3% |
| Security Audit | 8.8% | 5.8% |
| Q&A & Knowledge | 7.7% | 5.1% |
| Shell Execution | 9.8% | 12.4% |
| Workflow Execution | 10.6% | 12.9% |
| Multi-step Planning | 11.6% | 12.9% |
| Classification | 5.6% | 6.6% |
| Conversation | 4.1% | 3.5% |
| Web Search | 10.1% | 10.6% |
| File I/O | 10.1% | 10.4% |
| Content Writing | 4.9% | 4.7% |
Usage share over time
- Z.ai: GLM 5.3 Flash (batch)
- OpenAI: GPT-5.6 Luna (batch)
Frequently asked questions
Z.ai: GLM 5.3 Flash (batch) vs OpenAI: GPT-5.6 Luna (batch): which is better quality?
Z.ai: GLM 5.3 Flash (batch) scores higher on Artificial Analysis's Intelligence Index (41.9 vs 37.5).
Z.ai: GLM 5.3 Flash (batch) vs OpenAI: GPT-5.6 Luna (batch): which is cheaper?
Z.ai: GLM 5.3 Flash (batch) is cheaper at $0.12/1M vs $0.45/1M.
Z.ai: GLM 5.3 Flash (batch) vs OpenAI: GPT-5.6 Luna (batch): which is used more?
Z.ai: GLM 5.3 Flash (batch) has higher real OpenRouter usage share (rank #5 vs #7 of 325).
Z.ai: GLM 5.3 Flash (batch) vs OpenAI: GPT-5.6 Luna (batch): which wins more real-world task categories?
OpenAI: GPT-5.6 Luna (batch) handles more traffic in 17 of 25 shared task categories where both models have classified OpenRouter usage.
Source: OpenRouter (openrouter.ai/rankings), as of September 9, 2026.
Benchmark scores: Artificial Analysis (artificialanalysis.ai) via OpenRouter (openrouter.ai/rankings).
Methodology: www.smophy.ai/benchmark/methodology
Token counts originate from each provider's own tokenizer and are not directly comparable across providers.