More efficient long context
Hybrid attention makes reasoning over million-token materials more affordable—suited to full-repo and long-spec jobs.
DeepSeek · V4 Pro · Apr 2026
GratisDeepSeek V4 Pro — a flagship for deep reasoning and large-scale code engineering
Flagship V4 MoE for hard-constraint reasoning, full-repo coding, and long multi-step tool jobs — free to try in iMini Agent.
- Million-token context
- Think High / Max available
- Open weights for comparison
- Suited to long coding jobs
- Getting started
- Free to try
- Payment
- No card to start
- Access
- Works in browser
What is DeepSeek V4 Pro?
DeepSeek V4 Pro is DeepSeek’s V4 flagship from April 2026—built for hard-constraint reasoning, cross-file repo coding, and multi-step tool jobs that need to keep moving for a long time. Versus DeepSeek V3.2, long context is more efficient, and you can open Think High / Max for deeper thinking; for faster, lighter loads in the same family, look at V4 Flash. On this site we help you open it inside a free online AI Agent on iMini.
DeepSeek V4 Pro is the flagship of the DeepSeek V4 family released in April 2026. It is a Mixture-of-Experts model with roughly 1.6T total parameters and about 49B activated per token, paired with a 1M-token context window and a hybrid attention design that keeps long-context inference affordable.
Reasoning effort is a request parameter rather than a separate model. Simple prompts can skip thinking entirely; hard prompts can open Think High or Think Max, which is where Pro posts its strongest agentic and coding results.
Pro is the tier you reach for when the failure cost is high: cross-file refactors that must compile, derivations that must hold under explicit constraints, and long tool-calling runs that need to stay on goal for many steps without drifting.
- Vendor
- DeepSeek
- Released
- Apr 2026
- Context
- 1M tokens
- Active params
- ~49B / 1.6T MoE
- Deep thinking
- Think High / Max available
- Best for
- Hard reasoning & full-repo coding
What’s new versus DeepSeek V3.2
Long-context efficiency, Think depth, and long-job completion—the changes to check before making it your primary pick.
Think High / Max
Hard tasks can open a larger thinking budget; simple tasks can skip thinking—so depth isn’t one-size-fits-all.
More complete long coding jobs
Better suited to cross-file coding and multi-step tool work—holding the goal through to a deliverable result.
Try online before wiring APIs
Use iMini Agent first for real tasks; later connect Codex, Claude Code or OpenClaw with our DeepSeek guides.
DeepSeek V4 Pro benchmarks
Scores from the DeepSeek-V4 technical report, covering agentic coding, long-context retrieval, and head-to-head human evaluation.
SWE-bench Verified
80.6%
Real-world GitHub issue resolution — the headline agentic coding result for V4 Pro.
Terminal Bench 2.0
67.9%
Terminal-style agent tasks that require multi-step tool use to reach a result.
Codeforces rating
3206
Competitive programming rating, a proxy for hard algorithmic reasoning.
Human eval (overall)
86.52
Pro-Max five-dimension human rating vs Claude Opus 4.6-Max at 84.06.
MRCR 8-needle
>0.90
Retrieval accuracy at most points before 128K, still about 0.59 at the full 1M context.
API price (in/out)
$0.44 / $0.87
Per 1M tokens — frontier-tier quality at a fraction of typical flagship pricing.
Sources: DeepSeek-V4 technical report (arXiv:2606.19348) and published DeepSeek API pricing. Scores shift with reasoning effort — Non-Think, Think High and Think Max are not one number.
Three common workflows
DeepSeek V4 Pro fits hard-constraint reasoning, full-repo coding, and multi-step jobs that need to run for a long time.
Full-repo coding
For cross-file features, refactors, and test fixes. Open higher Think when needed.
Hard-constraint reasoning
For math, logic, and derivation under explicit rules. Keep steps checkable.
Long multi-step tool jobs
For continuous tool calls that advance step by step to a result. Agree on success criteria first.
Try DeepSeek V4 Pro online
GratisYou do not need a DeepSeek API key to test Pro. Open it inside iMini Agent, hand it a genuinely hard task, and judge the plan quality yourself.
No setup
No API key, no local CLI, no config file. Open the agent and describe the goal.
Long-horizon runs
Pro is built to hold a goal across many tool calls — the kind of task a chatbot abandons halfway.
Drop down when cheaper works
Move routine passes to V4 Flash in the same session and keep Pro for the hard parts.
DeepSeek V4 Pro vs GPT-5.6 Sol
Both are the flagship reasoning tier of their family, aimed at long-horizon agentic work where correctness matters more than cost.
| Criterion | DeepSeek V4 Pro | GPT-5.6 Sol |
|---|---|---|
| Released | Apr 2026 | Jul 2026 |
| Context window | 1M tokens | 1.05M tokens |
| Reasoning modes | Non-Think / Think High / Think Max | Up to max and ultra (parallel subagents) |
| API price (in/out per 1M) | $0.44 / $0.87 | $5.00 / $30.00 |
| Weights | Open, MIT licensed | Closed, API only |
| Agentic coding | SWE-bench Verified 80.6% | Agents' Last Exam 53.6 (new high) |
| Best when | Full-repo coding and hard reasoning on a budget | You are already on the OpenAI stack and want ultra mode |
Sol is the deeper option on OpenAI's own long-horizon evals and adds ultra mode with parallel subagents, but it costs roughly ten times more per token. V4 Pro answers with open weights, comparable agentic coding scores, and pricing that makes long runs practical. Try Pro free in iMini Agent and compare it against your current flagship on a task you already know well.
Free try iMini Agent →How to choose: Flash vs Pro
Both share a 1M context window. The gap is mainly ceiling vs throughput—pick by task, not by brand loyalty.
| Criterion | DeepSeek V4 Flash | DeepSeek V4 Pro |
|---|---|---|
| Context | 1M tokens | 1M tokens |
| Reasoning | Flash-Max available | Think High / Max |
| Coding & agents | High-throughput coding | Complex coding & long-horizon agents |
| Long-horizon tools | Better for short-to-mid | Long-horizon automation posture |
| Speed posture | Throughput first | Favors finish quality |
| Prefer when | High-turnaround DeepSeek work | Code & hard-reasoning flagship |
Also see DeepSeek V4 Flash
Using it on iMini Agent
Three steps to run this DeepSeek V4 model in a free online agent—no DeepSeek API key required.
- Step 1
Open iMini Agent
Click the button to launch the free online agent in your browser.
- Step 2
Pick this DeepSeek V4 model
Select Flash for throughput/cost or Pro for deeper reasoning inside the agent.
- Step 3
Describe your goal
Let the agent plan, call tools, and deliver — iterate with follow-ups as needed.
FAQ
Free quota, model naming, key specs, and how Flash differs from Pro.
Can I try DeepSeek V4 Pro free?
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Yes. Open iMini Agent from this page and start in the browser. Independent guide—online agent hosting is provided via iMini; no DeepSeek API key is required to try.
How does DeepSeek V4 Pro compare to GPT-5.6 Sol?
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Sol is OpenAI's flagship tier and adds ultra mode with parallel subagents, but it costs $5 / $30 per 1M input/output tokens against V4 Pro's $0.44 / $0.87 — roughly ten times more. Pro answers with open MIT-licensed weights and SWE-bench Verified 80.6% on agentic coding. If you are already on the OpenAI stack Sol is the deeper option; if long runs need to stay affordable, Pro is usually the better trade.
Is the name on this page the same model I pick in Agent?
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Yes. Look for DeepSeek V4 Pro in the agent model picker. Naming matches the model described here.
What are the main specs?
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Flagship V4 MoE (~1.6T total / ~49B active), 1M-token context, Think High / Max available. Built for hard reasoning, full-repo coding, and long multi-step tool jobs.
How should I split work with V4 Flash?
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Use Flash for high-turnaround everyday loads; use Pro when finish quality, deep reasoning, or long-horizon automation matters more than raw throughput.
Can I use the output commercially?
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Follow DeepSeek’s and iMini’s terms for your use case. This site does not grant model licenses; it only documents how to try the online agent.
Gratis
Use DeepSeek V4 Pro free on iMini Agent
Million-token context; deepen Think when needed—suited to hard-constraint reasoning and full-repo coding.
Online Agent is provided via iMini. This site is an independent guide and is not affiliated with DeepSeek.