DeepSeek V4 Flash 0731 Fast vs GPT-5.6 Luna
deepseek/deepseek-v4-flash-0731-fast · openai/gpt-5.6-luna
As of November 4, 2026, GPT-5.6 Luna is the cheaper API on UberLLM: $0.0035 per million input tokens and $0.0207 per million output, versus $0.2409 / $0.4819 for DeepSeek V4 Flash 0731 Fast, about 96% less when output is 3 tokens for every input token. These are the best prices on the market right now. Both work with one OpenAI-compatible key and UberLLM adds no fee. Choose GPT-5.6 Luna to cut cost; choose DeepSeek V4 Flash 0731 Fast when its capabilities fit your task better.
DeepSeek V4 Flash 0731 Fast vs GPT-5.6 Luna, side by side
| Spec | DeepSeek V4 Flash 0731 Fast | GPT-5.6 Luna |
|---|---|---|
| Price · input / 1M | $0.2409 | $0.0035 |
| Price · output / 1M | $0.4819 | $0.0207 |
| Context length | 1,000,000 | 1,050,000 |
| Max output tokens | 32,768 | 128,000 |
| Input modalities | text | text, image, file |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | — | Yes |
| Reasoning | Yes | Yes |
| % off list | 31.2% off | 98.3% off |
| First token, median (7 days) | 1.5 s (1,443 requests) | — |
Best prices on UberLLM right now. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated November 4, 2026. A price more than 70% below list is what buyers were billed, not an error. Why so cheap?
DeepSeek V4 Flash 0731 Fast vs GPT-5.6 Luna — FAQ
Is DeepSeek V4 Flash 0731 Fast or GPT-5.6 Luna cheaper?
GPT-5.6 Luna is cheaper on a blended token mix, by about 96%. A request costs what its provider charged, UberLLM adds no fee, and every request is listed with its cost in Activity.
What's the price difference between DeepSeek V4 Flash 0731 Fast and GPT-5.6 Luna?
DeepSeek V4 Flash 0731 Fast: $0.2409 in / $0.4819 out per 1M tokens. GPT-5.6 Luna: $0.0035 in / $0.0207 out per 1M tokens. That's roughly a 96% blended difference. Prices are live; UberLLM adds no fee.
Can I use both DeepSeek V4 Flash 0731 Fast and GPT-5.6 Luna with one API?
Yes. Both are served through a single OpenAI-compatible endpoint — set the base URL to https://api.uberllm.dev/v1 and your UberLLM key, then switch between them by changing the model id. Anthropic SDKs work via https://api.uberllm.dev/v1/messages.