AI agents compared
Every AI agent ClawDocx covers, side by side: who makes it, what it costs, whether you can write your own skills, and when each fact was last checked.
Personal agents
| Platform | Maker | Status | Price from | Your own skills | Docs | Last verified |
|---|---|---|---|---|---|---|
| ChatGPT | OpenAI | Generally available | Free; Go $8, Plus $20 and Pro from $100 a month; Business $20 per user a month billed annually | Yes: SKILL.md folders, plugin.json plugins (Agent Plugins schema) and custom MCP servers | ChatGPT docs | |
| Claude | Anthropic | Generally available | Free; Pro $20 a month ($17 a month billed annually); Max from $100 a month | Yes: ZIP uploads of a skill folder (`skill.md` in the help centre, `SKILL.md` in platform docs), custom connectors (remote MCP servers) and plugins with an optional `.claude-plugin/plugin.json` manifest | Claude docs | |
| Gemini Spark | Beta | Google AI Pro at $19.99 a month or Ultra from $99.99 a month; no free access | Yes: Upload a SKILL.md, or a .zip with SKILL.md at the root, or create a skill in the Gemini app; custom remote MCP apps (US, English only) | Gemini Spark docs | ||
| Grok Bot | SpaceXAI, running on Cursor's infrastructure and accounts | Beta | Included with Cursor Pro ($20 a month) and higher plans; free Cursor accounts get a usage-credit trial inside a 7-day window | Yes: Skills made in chat or by demonstration (Teach a task), with no documented file format; plugins are connected from the Plugins sidebar or an in-chat Connect card | Grok Bot docs | |
| Instinct | Spear Street Technology, Inc. (doing business as Instinct) | Invite only | No published price; PYMNTS reports the CEO has said he does not want to charge users, and the terms let the company revise pricing at any time | No: None documented: instinct.com publishes no developer documentation | No public docs | |
| Meta Muse | Meta | Generally available | Free up to 100M Muse tokens a week; Power $20/month (500M a week) and Maximum $100/month (3B a week) | No: Meta writes the SKILLs behind its built-in connectors, and Muse builds custom connectors on request for services with an API or CLI | Meta Muse docs |
Coding agents
| Platform | Maker | Status | Price from | Your own skills | Docs | Last verified |
|---|---|---|---|---|---|---|
| Claude Code | Anthropic | Generally available | Included with Claude Pro ($20 a month, $17 billed annually) and Max (from $100 a month); or Anthropic API billing | Yes: Agent Skills SKILL.md in .claude/skills, plus plugins that bundle skills, agents, hooks and MCP servers | Claude Code docs | |
| Cursor | Anysphere (Cursor), a SpaceX subsidiary since August 2026 | Generally available | Hobby free; Pro $20, Pro+ $60 and Ultra $200 a month; Teams from $40 per user a month | Yes: SKILL.md in .agents/skills or .cursor/skills (.claude/skills and .codex/skills for compatibility), .mdc rules, subagents, hooks.json, MCP and plugins | Cursor docs | |
| Google Antigravity | Generally available | Free individual plan; Google AI Pro ($20) and Ultra ($100 or $200 a month) raise limits, per Google's May 2026 plan post | Yes: SKILL.md folders in .agents/skills, plugin.json plugins, mcp_config.json, hooks.json, Markdown subagents and rules | Google Antigravity docs | ||
| OpenAI Codex | OpenAI | Generally available | Included in every ChatGPT plan, from Free; Plus $20 a month; Pro from $100 a month | Yes: SKILL.md folders in .agents/skills, plugin.json plugins, MCP servers in config.toml, hooks.json and AGENTS.md instructions | OpenAI Codex docs |
Self-hosted agents
| Platform | Maker | Status | Price from | Your own skills | Docs | Last verified |
|---|---|---|---|---|---|---|
| Hermes Agent | Nous Research | Open source | Free (MIT); you pay your model provider, or use Nous Portal from $20 a month | Yes: SKILL.md folders compatible with agentskills.io, Python plugins with a plugin.yaml manifest, and MCP servers | Hermes Agent docs | |
| OpenClaw | OpenClaw Foundation | Open source | Free and open source (MIT); model costs depend on the provider you connect | Yes: Agent Skills SKILL.md with an optional metadata.openclaw block; shareable on ClawHub | OpenClaw docs |
Standards
| Platform | Maker | Status | Price from | Your own skills | Docs | Last verified |
|---|---|---|---|---|---|---|
| Agent Skills | Open spec started by Anthropic, published at agentskills.io | Open specification | Free; code Apache-2.0, docs CC-BY-4.0 | Yes: A SKILL.md folder: YAML frontmatter (name, description) plus Markdown instructions, with optional scripts/, references/ and assets/ | Agent Skills docs | |
| MCP | Agentic AI Foundation (Linux Foundation), originally Anthropic | Open specification | Free and open source; each host sets its own limits (Claude's Free plan allows one custom connector) | Yes: MCP servers built with the official SDKs, MCP Apps (ui:// HTML resources) and Agent Skills served over MCP through the Skills extension | MCP docs |
Frequently asked questions
- What is the difference between a coding agent and a self-hosted agent?
- The two terms answer different questions. A coding agent is built to work inside a code repository: it reads files, edits code, runs commands and tests, and can commit the result. Self-hosted describes where an agent runs: on a machine you own rather than on a vendor's service, so your data, your credentials and your choice of model stay with you. A platform can be one, the other or both, and ClawDocx groups each platform under a single primary category, so an agent that is both is listed once, under whichever of the two it is best known for.
- What does Last verified mean on a ClawDocx platform page?
- Every ClawDocx page about an AI agent platform ends its key facts with a Last verified date. That is the day someone at ClawDocx last checked the facts on that page, among them the maker, the release status, the starting price and the skill format, against the vendor's own documentation and pricing pages.
- Can one skill work in several AI agents?
- Often, yes. Many agents read the Agent Skills format: a folder with a SKILL.md file of YAML frontmatter and Markdown instructions. Each agent adds its own optional fields and looks in its own folders, so check the skill format a platform documents before you copy a skill across.