Real data comparison
DeepSeek: DeepSeek V4.1 Flash (batch) vs OpenAI: GPT-5.6 Luna (batch)
On quality, DeepSeek: DeepSeek V4.1 Flash (batch) leads (39.5 vs 37.3). On price, DeepSeek: DeepSeek V4.1 Flash (batch) is cheaper ($0.20 vs $0.45 per 1M). In real production usage, DeepSeek: DeepSeek V4.1 Flash (batch) is used more (rank #4 vs #8 of 353). Across 23 real task categories where both models have classified traffic, DeepSeek: DeepSeek V4.1 Flash (batch) handles more of the traffic in 15 of them.
- DeepSeek: DeepSeek V4.1 Flash (batch)
- OpenAI: GPT-5.6 Luna (batch)
Head-to-head by real task
DeepSeek: DeepSeek V4.1 Flash (batch) leads 15 of 23 shared task categories by real classified traffic share; OpenAI: GPT-5.6 Luna (batch) leads 8. Not a benchmark score - this is what developers actually route to each model for, per OpenRouter's task classification.
| Task | DeepSeek: DeepSeek V4.1 Flash (batch) | OpenAI: GPT-5.6 Luna (batch) |
|---|---|---|
| Tool Dispatch | 9.1% | 31.6% |
| Security Audit | 18.5% | 1.9% |
| DevOps & Config | 14.3% | 2.1% |
| File I/O | 14.9% | 3.2% |
| SQL & Database | 11.7% | 23.2% |
| Repo Scanning | 13.7% | 3.2% |
| DevOps | 12.7% | 2.2% |
| Data Transformation | 3.4% | 11.9% |
| Debugging | 17.0% | 10.3% |
| Customer Support | 2.8% | 9.3% |
| Frontend & UI | 11.5% | 5.0% |
| Code Review | 9.2% | 13.8% |
| Multi-step Planning | 11.4% | 7.4% |
| Workflow Execution | 10.2% | 6.8% |
| Code Generation | 15.7% | 13.5% |
| Research & Reports | 9.4% | 7.4% |
| Math | 7.1% | 5.5% |
| Conversation | 5.1% | 3.7% |
| Finance & Trading | 6.2% | 7.5% |
| Memory Extraction | 4.4% | 3.1% |
| Content Writing | 3.9% | 5.0% |
| Web Search | 7.2% | 7.8% |
| Q&A & Knowledge | 5.7% | 5.1% |
Usage share over time
- DeepSeek: DeepSeek V4.1 Flash (batch)
- OpenAI: GPT-5.6 Luna (batch)
Frequently asked questions
DeepSeek: DeepSeek V4.1 Flash (batch) vs OpenAI: GPT-5.6 Luna (batch): which is better quality?
DeepSeek: DeepSeek V4.1 Flash (batch) scores higher on Artificial Analysis's Intelligence Index (39.5 vs 37.3).
DeepSeek: DeepSeek V4.1 Flash (batch) vs OpenAI: GPT-5.6 Luna (batch): which is cheaper?
DeepSeek: DeepSeek V4.1 Flash (batch) is cheaper at $0.20/1M vs $0.45/1M.
DeepSeek: DeepSeek V4.1 Flash (batch) vs OpenAI: GPT-5.6 Luna (batch): which is used more?
DeepSeek: DeepSeek V4.1 Flash (batch) has higher real OpenRouter usage share (rank #4 vs #8 of 353).
DeepSeek: DeepSeek V4.1 Flash (batch) vs OpenAI: GPT-5.6 Luna (batch): which wins more real-world task categories?
DeepSeek: DeepSeek V4.1 Flash (batch) handles more traffic in 15 of 23 shared task categories where both models have classified OpenRouter usage.
Source: OpenRouter (openrouter.ai/rankings), as of September 23, 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.