DeepSeek V4 Flash Vision Exp is an experimental vision-enabled version of [DeepSeek V4 Flash 0731](https://openrouter.ai/deepseek/deepseek-v4-flash-0731) from DeepSeek, adding image understanding while matching the base model on text capabi…
Model details →DeepSeek: DeepSeek V4 Flash Vision Exp vs OpenAI: GPT-5.6 Luna Pro (batch)
OpenAI: GPT-5.6 Luna Pro (batch) wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
GPT-5.6 Luna Pro is the same underlying model as [GPT-5.6 Luna](https://openrouter.ai/openai/gpt-5.6-luna), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. Learn more in OpenAI's docs: https://devel…
Model details →Side-by-side comparison
| Capability | DeepSeek: DeepSeek V4 Flash Vision Exp | OpenAI: GPT-5.6 Luna Pro (batch) | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1.0M | 1.1M | 🏆 OpenAI: GPT-5.6 Luna Pro (batch) |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.22 | $0.10 | 🏆 OpenAI: GPT-5.6 Luna Pro (batch) |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $0.66 | $0.60 | 🏆 OpenAI: GPT-5.6 Luna Pro (batch) |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is DeepSeek: DeepSeek V4 Flash Vision Exp better than OpenAI: GPT-5.6 Luna Pro (batch)?
OpenAI: GPT-5.6 Luna Pro (batch) wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between DeepSeek: DeepSeek V4 Flash Vision Exp and OpenAI: GPT-5.6 Luna Pro (batch)?
Input: $0.22 vs $0.10 per 1M tokens. Output: $0.66 vs $0.60 per 1M tokens.
What context windows do DeepSeek: DeepSeek V4 Flash Vision Exp and OpenAI: GPT-5.6 Luna Pro (batch) support?
DeepSeek: DeepSeek V4 Flash Vision Exp supports up to 1.0M tokens. OpenAI: GPT-5.6 Luna Pro (batch) supports up to 1.1M tokens.
Do both DeepSeek: DeepSeek V4 Flash Vision Exp and OpenAI: GPT-5.6 Luna Pro (batch) support tool calling?
DeepSeek: DeepSeek V4 Flash Vision Exp: yes. OpenAI: GPT-5.6 Luna Pro (batch): yes.