DeepSeek: DeepSeek V4 Flash 0423 vs OpenAI: GPT-5.6 Luna (batch)
Based on weekly OpenRouter usage tracked by AI Tier List, OpenAI: GPT-5.6 Luna (batch) ranks #3 overall — ahead of DeepSeek: DeepSeek V4 Flash 0423 at #4. OpenAI: GPT-5.6 Luna (batch) is cheaper on input tokens at $0.10/1M vs $0.14/1M for DeepSeek: DeepSeek V4 Flash 0423. OpenAI: GPT-5.6 Luna (batch) offers the larger context window at 1.1M tokens.
DeepSeek: DeepSeek V4 Flash 0423 vs OpenAI: GPT-5.6 Luna (batch): which should you use?
Choose DeepSeek: DeepSeek V4 Flash 0423 if…
- Cheaper to write — $0.28 vs $0.60 per 1M output tokens, the line item that decides generation-heavy costs.
Choose OpenAI: GPT-5.6 Luna (batch) if…
- It sees more real traffic — #3 overall on OpenRouter's weekly ranking, against #4 for DeepSeek: DeepSeek V4 Flash 0423.
- Cheaper to read — $0.10 vs $0.14 per 1M input tokens, which is what dominates long-prompt and RAG workloads.
- Bigger context window — 1.1M vs 1M tokens.
- It accepts file, image input, which DeepSeek: DeepSeek V4 Flash 0423 does not.
- It is the newer model — released Jul 2026 against Apr 2026.
Spec Comparison
| Spec | DeepSeek: DeepSeek V4 Flash 0423 | OpenAI: GPT-5.6 Luna (batch) |
|---|---|---|
| Author | deepseek | openai |
| Input price (per 1M tokens) | $0.14 | $0.10 |
| Output price (per 1M tokens) | $0.28 | $0.60 |
| Context window | 1M | 1.1M |
| Input modalities | text | file, image, text |
| Output modalities | text | text |
| AA Intelligence | — | — |
| AA Coding | — | — |
| AA Agentic | 31.1 | — |
| Released | Apr 2026 | Jul 2026 |
What DeepSeek: DeepSeek V4 Flash 0423 and OpenAI: GPT-5.6 Luna (batch) actually cost to run
On a read-heavy job — 1M tokens in, 100K out — DeepSeek: DeepSeek V4 Flash 0423 costs $0.17 and OpenAI: GPT-5.6 Luna (batch) costs $0.16.
Flip the shape — 100K in, 1M out — and it becomes $0.29 for DeepSeek: DeepSeek V4 Flash 0423 versus $0.61 for OpenAI: GPT-5.6 Luna (batch).
Both figures are the published per-token rates multiplied out; caching and batch discounts are not included.
Usage Rank by Task
| Task | DeepSeek: DeepSeek V4 Flash 0423 | OpenAI: GPT-5.6 Luna (batch) |
|---|---|---|
| Overall | #4 | #3 |
| Memory Extraction | #2 | — |
| Multi-step Planning | #1 | #6 |
| Tool Dispatch | #1 | #4 |
| Web Search | #1 | #9 |
| Agent Workflows | #3 | #7 |
| Classification & Tagging | #1 | #3 |
| Debugging | #4 | #7 |
| DevOps Config | #5 | #6 |
| File Read/Write | #4 | #6 |
| Frontend UI | #4 | #5 |
| Code Implementation | #6 | #5 |
| Repo Analysis | #4 | #5 |
| Code Review & Security | #4 | #5 |
| Shell Execution | #7 | — |
About DeepSeek: DeepSeek V4 Flash 0423 and OpenAI: GPT-5.6 Luna (batch)
DeepSeek: DeepSeek V4 Flash 0423
Built by deepseek · released Apr 2026 · 1M-token context
DeepSeek V4 Flash is an efficiency-optimized Mixture-of-Experts model from DeepSeek with 284B total parameters and 13B activated parameters, supporting a 1M-token context window. It is designed for fast inference and...
OpenAI: GPT-5.6 Luna (batch)
Built by openai · released Jul 2026 · 1.1M-token context
GPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series. It is suited for high-volume, latency-sensitive tasks such as chat, classification, and lightweight agentic workflows, providing capable reasoning for...
Related comparisons
- DeepSeek: DeepSeek V4 Flash 0423 vs DeepSeek: DeepSeek V4 Flash 0731
- DeepSeek: DeepSeek V4 Flash 0423 vs Tencent: Hy3
- DeepSeek: DeepSeek V4 Flash 0423 vs Xiaomi: MiMo-V2.5
- OpenAI: GPT-5.6 Luna (batch) vs DeepSeek: DeepSeek V4 Flash 0731
- OpenAI: GPT-5.6 Luna (batch) vs Tencent: Hy3
- OpenAI: GPT-5.6 Luna (batch) vs Xiaomi: MiMo-V2.5
Get notified when DeepSeek: DeepSeek V4 Flash 0423 or OpenAI: GPT-5.6 Luna (batch) moves
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FAQ
Which is better, DeepSeek: DeepSeek V4 Flash 0423 or OpenAI: GPT-5.6 Luna (batch)?
Based on weekly OpenRouter usage tracked by AI Tier List, OpenAI: GPT-5.6 Luna (batch) ranks #3 overall — ahead of DeepSeek: DeepSeek V4 Flash 0423 at #4. OpenAI: GPT-5.6 Luna (batch) is cheaper on input tokens at $0.10/1M vs $0.14/1M for DeepSeek: DeepSeek V4 Flash 0423. OpenAI: GPT-5.6 Luna (batch) offers the larger context window at 1.1M tokens.
Which is cheaper, DeepSeek: DeepSeek V4 Flash 0423 or OpenAI: GPT-5.6 Luna (batch)?
OpenAI: GPT-5.6 Luna (batch) is cheaper at $0.10 per 1M input tokens. Output pricing: DeepSeek: DeepSeek V4 Flash 0423 $0.28, OpenAI: GPT-5.6 Luna (batch) $0.60.
Which is better for coding, DeepSeek: DeepSeek V4 Flash 0423 or OpenAI: GPT-5.6 Luna (batch)?
DeepSeek: DeepSeek V4 Flash 0423. Best coding-task usage rank this week: DeepSeek: DeepSeek V4 Flash 0423 #4, OpenAI: GPT-5.6 Luna (batch) #5.
Is OpenAI: GPT-5.6 Luna (batch) still ahead of DeepSeek: DeepSeek V4 Flash 0423 right now?
Yes. For the week of 2026-08-10, OpenAI: GPT-5.6 Luna (batch) ranks #3 overall on OpenRouter usage against #4 for DeepSeek: DeepSeek V4 Flash 0423. Ranks refresh weekly, and the verdict on this page flips if they cross.
Usage ranks are weekly data aggregated by OpenRouter. Prices are USD per 1M tokens.