Agentic harness comparison
Claude Code vs DeepSeek Harness
Compared on where each one runs, which editors it supports, how autonomous it is, and how it bills — the four things that actually decide Claude Code vs DeepSeek Harness. Rankings reflect fit and trade-offs, not a single universal winner; partner links, when present, do not replace that methodology.
Details last verified October 2, 2026
Anthropic
Claude Code
Terminal, IDE plugins, desktop, and browser · Agentic
DeepSeek
DeepSeek Harness
Local web UI, CLI profiles, SDK and ACP · Agentic
| Specification | Claude Code | DeepSeek Harness |
|---|---|---|
| Vendor | ||
| Vendor | Anthropic | DeepSeek |
| Runs in | ||
| Runs in | Terminal, IDE plugins, desktop, and browser | Local web UI, CLI profiles, SDK and ACP |
| Editor support | ||
| Editor support | Terminal CLI, VS Code / Cursor, JetBrains, Desktop app, claude.ai/code | Local web UI, Any (CLI) |
| Autonomy | ||
| Autonomy | Agentic | Agentic |
| Pricing model | ||
| Pricing model | Hybrid | Usage-based |
| Requires changing editor | ||
| Requires changing editor | No | No |
Dates refer to the linked source’s publication or capture unless it explicitly states when the benchmark was measured. Values we could not confirm are shown as “Not verified” rather than estimated.
Claude Code
Anthropic's agentic coding tool runs in the terminal, supported IDEs, a desktop app and the browser. Configuration and permissions vary by surface and organisation. Subscription sign-in shares eligible Claude plan usage; Anthropic Console/API and third-party provider billing are separate paths.
Best for
- Multi-file refactors
- Migrations
- Delegated engineering tasks
Watch out
Claude Code is included with Pro, Max, Team and Enterprise; Free does not include it. Web prices: Pro $20/month or $200 billed yearly; Max 5x $100/month and Max 20x $200/month; Team Standard $25/seat/month or $20 with annual billing, Premium $125 or $100 respectively; Enterprise $20/seat/month with annual billing plus API-rate usage (https://claude.com/pricing). API credentials can bill separately from subscription usage. Model selection depends on account, user/org settings, provider and client version: default clears an override, while Anthropic API opus and sonnet resolve to Opus 5.5 and Sonnet 5.5. Sonnet 5.5 requires v2.1.284+, Opus 5.5 v2.1.280+. Third-party provider aliases can resolve to older versions. Fable normally resolves to Fable 5.1, except Claude apps gateway sessions use Fable 5; neither is an account-type default. On Pro, Fable uses usage credits; on Max it can use up to 50% of the regular weekly allowance before additional Fable work requires usage credits. Interactive credit consent is not a guarantee for automation: non-interactive -p requests can bill credits without asking. Five-hour and weekly limits depend on plan/model; check the account usage page (https://code.claude.com/docs/en/model-config; https://support.claude.com/en/articles/11049741-what-is-the-max-plan). Native Windows supports shell tools, but Claude's sandbox is available on macOS, Linux and WSL2, not native Windows or WSL1. It is off by default and covers shell execution, not every file tool, MCP server or hook (https://code.claude.com/docs/en/sandboxing).
DeepSeek Harness
DeepSeek's MIT developer-preview agent runtime uses a plugin architecture for model adapters, tools and the agent loop. The dsh launcher provides a local web UI and profile-based SDK, headless and ACP entry points; it is not a hosted DeepSeek model or a paid seat plan.
Best for
- Teams evaluating a DeepSeek-native agent loop
- Plugin authors targeting the dsh-plugin ecosystem
- Local web-UI agent sessions with bring-your-own keys
Watch out
Current source requires Node ^22.19.0 or >=24.0.0. The release list begins with dsh-v0.2.0-rc.2, published September 29 and marked prerelease; the stable latest-release endpoint returns 404. npx @deepseek-ai/dsh web defaults to loopback port 3080. Provider credentials are stored in $DSH_HOME/.credentials.yaml and profile configuration in profiles/<name>/cordis.patch.yml. The model form does not support OAuth providers such as Codex. Free client licensing is separate from inference charges. The publisher explicitly says it has not undergone a security audit and that sandbox/approval controls do not guarantee isolation; use a disposable environment. No independent performance benchmark is asserted.
Common questions
Claude Code vs DeepSeek Harness
Answered from the verified figures on this page rather than general guidance.
Do I have to change editor to use Claude Code or DeepSeek Harness?
How are Claude Code and DeepSeek Harness priced?
Is Claude Code or DeepSeek Harness better for large refactors?
Should I run Claude Code and DeepSeek Harness together?
Will my project rules transfer between Claude Code and DeepSeek Harness?
Does Claude Code require a Max plan?
Do coding agents replace code review?
Should we harden MCP before rolling out a coding agent?
Next step
Which one fits
Autonomy and editor constraints decide this far more reliably than a benchmark score.
If most of your week is small, frequent edits, an assistive workflow beats delegation and an agentic harness sits idle while billing. If you regularly hand over work spanning many files, the reverse is true.
Where one tool requires changing editor and the other does not, that difference usually outweighs any capability gap across a team — rollouts fail on adoption, not capability.
“Open vendor” links use a first-party redirect for click counting. They are not commissionable partner placements unless a programme is active for that vendor. Affiliate disclosure.