Custom GPTs

Configurable, file-aware versions of ChatGPT that you build once and reuse or share. You set the system prompt, attach knowledge files, switch on tools (browse, image, code), and optionally wire up Actions that call your own APIs. The store remains the only mainstream way to distribute a configured AI assistant to staff or customers without building software.

• System prompt, knowledge files, and tool toggles in one builder UI
• Actions for calling external APIs from within a conversation
• Shareable via link inside Team and Enterprise; publishable in the GPT store
• Built on GPT-5.4 platform with optional GPT-5.5 upgrades for paid tiers
• Inherits ChatGPT's image, voice, and code tools automatically

• Bid response assistant pre-loaded with your capability statements and case studies
• Onboarding GPT for new starters with HR policies and SOPs attached
• Sales qualifier GPT that scores inbound leads against your ICP
• Customer support triage GPT that drafts replies in your brand voice
• Internal compliance GPT with the relevant UK guidance attached

Context across sessions is shallow compared with Claude Projects; a Custom GPT forgets the thread of a long deal between visits. Actions are powerful but the build experience is fiddly and undocumented in places. Public store discoverability is poor, so it is not really a distribution channel for SMEs.

Included with Plus, Pro, Team, and Enterprise. Building is free; usage counts against the underlying plan's message limits. Sharing publicly requires Plus or above; sharing inside a tenant requires Team or Enterprise.