DeepSeek native
AI coding agent

Open source seek — powered by DeepSeek.

5 MB · zero deps · MIT licensed · no telemetry · multi-provider

$ copy
GitHub → Releases → Install ↓

why seek

Built different.

DeepSeek-native, not a generic LLM wrapper. Every line optimises for cost, speed, and minimalism.

$0.0028
per 1M tokens on cache hit

DeepSeek V4-Flash prefix-cache pricing. 97% hit rate after turn 5 — the cache discipline pays out in real savings. Off-peak window (UTC+8 00:30–08:30) takes another 50% off.

5 MB
single static binary

Go-built, no Python/Node runtime, no npm install. Drop it on macOS, Linux, or Windows and it works. go install or grab a tarball.

  • ✓ V4 reasoning mode — think tool
  • ✓ FIM endpoint — 5–10× cheaper fill-in edits
  • ✓ Real-time cache hit rate — status bar
  • ✓ Off-peak countdown — live in TUI
  • ✓ Anthropic / OpenAI / Gemini — multi-provider
  • ✓ Bilingual (中文 + EN) — tool descriptions, prompts, errors
    • seek@agent:~/project
    $ seek "explain the routing in this Go project" ○ idle ─── Thinking ─── Model: deepseek-v4-flash cache 98.9% cost $0.0202 ctx 12% (123640/1000000) 🌙 off-peak -50% ─────────────── The project uses a chi router in这个项目使用 chi 路由，在 `cmd/server/main.go` with three`cmd/server/main.go` 中注册了 handler groups: API, webhook, admin.三组处理器：API、webhook、admin。 $ ▊

    pricing

    Cost per 1M tokens.

    Real API pricing, not marketing. Cache hit rate is visible in the status bar so you can optimise for it.

    seek (V4-Flash) seek (V4-Pro) Claude Sonnet 4
    Input (cache miss) $0.14 $0.435¹ $3.00
    Input (prefix cache hit) $0.0028 $0.0036 $0.30
    Output $0.28 $0.87 $15.00
    Off-peak discount 50% off 50% off —

    Cache-hit cost comparison · per 1M input tokens

    seek V4-Flash
    $0.0028
    seek V4-Pro
    $0.0036
    Claude Sonnet 4
    $0.30
     * Bars are proportional — Claude is ~107× the cost of V4-Flash
    Cache hit rate: 95.7% on bootstrap benchmark · live in status bar
    ¹ V4-Pro at 75%-off promo rate; full rack: $1.74 / $0.0145 / $3.48

    capabilities

    What you get.

    Everything you expect from a modern coding agent — none of the bloat.

    >

    MCP server

    Extend with any MCP-compatible tool server

    >

    Custom skills

    .md + frontmatter — compatible with Claude Code skills

    >

    Session persistence

    Save, fork, branch, compact — full lifecycle

    >

    Multi-provider

    DeepSeek + Anthropic + OpenAI + Gemini + compatible

    >

    JSON-RPC 2.0

    Headless mode for IDE integration

    >

    Permission system

    Granular filesystem & shell access control

    >

    Bilingual

    Chinese & English — prompts, errors, docs

    >

    Zero telemetry

    Your API key, your data, your terminal.

    install

    One binary, anywhere.

    No runtime deps, no package manager required. Pick your path.

    macOS / Linux (curl pipe)

    Pulls the latest release — no Go toolchain needed.

    $ curl -fsSL https://github.com/whyiyhw/seek/releases/latest/download/seek_$(uname -s)_$(uname -m).tar.gz | tar -xz -C /usr/local/bin seek

    Go install (from source)

    Requires Go 1.25+. Installs to $GOPATH/bin.

    $ go install github.com/whyiyhw/seek/cmd/seek@latest

    Windows

    Download the zip from the releases page and unpack it.

    $ # Grab seek_*_windows_amd64.zip from github.com/whyiyhw/seek/releases

    Upgrade

    Built-in atomic in-place update — no re-download needed.

    $ seek -upgrade # replaces the running binary atomically
    First run walks you through provider setup — no manual export needed.