DeepSeek V4 Chat Online: Flash Free for Subscribers, Pro at 1 Credit
Two DeepSeek V4 models in one chat, next to Qwen, Kimi, GLM and Seed. Switch between them mid-conversation.
Updated September 23, 2026
DeepSeek V4 is the model people reach for when an answer needs structure: outlines, rewrites, step-by-step plans, and anything with a format to respect. On GoCrazyAI you get two versions of it in the same chat window as six other models, so you can draft on an included model and finish on a premium one without leaving the conversation.
DeepSeek V4 Flash is free for subscribers. DeepSeek V4 Pro is premium, costs 1 credit per message, and holds up to 1M tokens of context, which is enough for a full transcript or a long document in a single message.
DeepSeek models in the chat
DeepSeek V4 Flash
Fast & smart
Great default for everyday writing
Free for subscribers: 40 messages a day at no credit cost, shared across the included models.
DeepSeek V4 Pro
Best value · 1M context
Near-frontier quality per credit
Premium: 1 credit per message you send, reply included, failed messages refunded.
What DeepSeek is good at
- Structured output: outlines, numbered plans, tables and consistent formatting
- Rewriting and tightening existing text without changing its meaning
- Long inputs on V4 Pro: paste a whole transcript or document at once
- Everyday writing on V4 Flash at no credit cost
Prompts to try
Each button opens the chat with the prompt in the box and DeepSeek V4 Flash selected. Replace the bracketed parts and send.
Repurpose a transcript
Turn this transcript into a 6-post thread, a 120-word newsletter section and a list of the 5 best 20-second clips with timestamps. Transcript: [paste]
Try this promptOutline a 10-minute video
Outline a 10-minute YouTube video about [topic] with a cold open, 5 sections with talking points, and a closing call to action. Keep each section under 80 words.
Try this promptRewrite in three tones
Rewrite this caption in three tones, casual, confident and funny, each under 150 characters: [caption]
Try this promptContent calendar
Build a 2-week posting calendar for a [niche] account with one idea per day, the format (talking head, b-roll, text on screen) and a hook line for each.
Try this promptFlash or Pro?
Start on V4 Flash. It is free for subscribers, fast and handles most writing tasks well. Move to V4 Pro when the input is long, when the task needs several reasoning steps, or when you want the most careful version of an answer before you publish. Because both live in the same chat, you can send the same message to Pro with one click and compare.
Included models: 40 messages a day at no credit cost, shared across the four models that are free for subscribers, resetting at midnight UTC. AI Chat is only for paid subscribers, so an active GoCrazyAI subscription is needed. Premium models cost 1 credit per message you send. The reply is included at any length, and a message that fails is refunded automatically.
How DeepSeek fits with the other models
Use DeepSeek for the skeleton and a different model for the voice. A common flow is DeepSeek V4 for the outline, Kimi K3 for a script that has to sound like a person, and Qwen3 VL Plus when a clip or image is part of the question. Every reply is labelled with the model that wrote it, so the conversation stays readable.
The other models in the same chat
Frequently asked questions
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Runs in the browser, included with a GoCrazyAI subscription. No app download. Your chats are saved.
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