A source-backed map of DeepSeek V4 models, API pricing, native Harness, third-party agent runtimes and practical integration guides.
Short answer
Hermes Agent is built by Nous Research, not DeepSeek. It appears here because its native DeepSeek provider handles V4 model selection, thinking controls and reasoning history across tool calls.
DeepSeek
The English docs now make DeepSeek's current API shape explicit: V4-Pro/V4-Flash, dual OpenAI/Anthropic compatibility, thinking mode, tool calls, caching and agent-tool integrations.
Best fit · Developers evaluating Chinese model APIs for coding agents, reasoning, tool use and OpenAI/Anthropic-compatible migration.
Coverage · 100/100
DeepSeek
V4 is the current API line, with separate migration and pricing implications from the broader DeepSeek brand.
Best fit · Developers migrating DeepSeek integrations to current V4 model names and long-context reasoning workflows.
Coverage · 100/100
DeepSeek
This is DeepSeek's own open agent harness rather than another API integration guide: it exposes the runtime architecture, trace history and extension surface needed to build customized coding agents.
Best fit · Developers building or studying composable coding agents, custom agent modes, plugin ecosystems and traceable local-first runtimes.
Coverage · 100/100
Nous Research
Hermes is a strong DeepSeek companion because it has native V4 handling, but its larger value is runtime portability: DeepSeek remains one selectable provider rather than the identity of the agent.
Best fit · Developers and technical operators who want one self-hosted agent across multiple model providers, messaging channels, scheduled work, skills and long-lived memory, including DeepSeek V4.
Coverage · 100/100
DeepSeek
DeepSeek's English docs cover agent-tool integration as a documented path.
Best fit · Developers who want DeepSeek as a backend for coding assistants and terminal agents.
Coverage · 100/100
The hosted V4 Pro snapshot currently served by DeepSeek's official API, with million-token context, 384K output and peak/off-peak billing.
Open MoE flagship with million-token context for coding and long agent runs.
Fast DeepSeek V4 lane for economical reasoning, coding and long-context work.
Keep stable public model IDs separate from the hosted snapshot they currently route to, and compare peak and off-peak billing on the same token basis.
The current hosted Pro snapshot for coding, reasoning and long-horizon agent work.
The stable public Pro route; verify its active snapshot and billing before production use.
The lower-cost and higher-concurrency route for throughput-sensitive workloads.
The model API and the runtime are separate decisions. Compare ownership, provider lock-in, traceability, channels, skills and production maturity.
Nous Research's multi-provider agent with memory, skills, messaging gateways, cron, subagents and native DeepSeek V4 handling.
DeepSeek's developer-preview, plugin-based coding-agent runtime with append-only trajectories and custom modes.
Use Claude Code, Copilot, OpenCode, OpenClaw and other tools through documented compatible endpoints.
Use the setup guide for a concrete Hermes path, then use the runtime comparison to decide whether Hermes, Harness, Reasonix or OpenClaw owns the workflow.
Current model routes, limits, concurrency and peak/off-peak prices.
DeepSeek HarnessDeepSeek's official coding-agent runtime and developer-preview status.
Hermes Agent repositoryHermes ownership, license, capabilities, installation and provider-neutral positioning.
Hermes DeepSeek provider pluginNative DeepSeek V4 model handling, thinking controls and reasoning-history behavior.
Last checked: 2026-08-25