DeepSeek V4.1 Flash (reka-ai) vs GPT-5.6 Luna
Both have similar output pricing, while GPT-5.6 Luna offers a larger context window. Choose DeepSeek V4.1 Flash (reka-ai) or GPT-5.6 Luna based on the trade-off between cost, context, and the benchmarks that matter for your use case.
| Spec | DeepSeek V4.1 Flash (reka-ai) | GPT-5.6 Luna |
|---|---|---|
| Provider | LLM Gateway | OpenAI |
| Input / 1M tokens | $0.30 | $0.20 |
| Output / 1M tokens | $1.20 | $1.20 |
| Context window | 1M | 1.1M |
| Parameters | — | — |
| Open weights | Yes | — |
| Released | Sep 2026 | — |
| LMArena (Chatbot Arena) Elo score | — | 1431 |
| LMArena WebDev Elo score | — | 1518 |
| LMArena Vision Elo score | — | 1257 |
| GPQA Diamond score | — | 91.6 |
| Epoch Capabilities Index score | — | 157 |
FAQ
Is DeepSeek V4.1 Flash (reka-ai) or GPT-5.6 Luna cheaper?
DeepSeek V4.1 Flash (reka-ai) and GPT-5.6 Luna have comparable output pricing.
Which has the larger context window, DeepSeek V4.1 Flash (reka-ai) or GPT-5.6 Luna?
GPT-5.6 Luna has the larger context window (1.1M tokens).
Pricing is indicative — confirm with the provider before production use. Highlighted values indicate the better figure for that row.