If Anthropic starts entering the engineering space, OpenAI and others may follow.

The key question is: why would your tool or harness perform better than the frontier model providers’ own native tools, such as Claude for Creative Work, if your product is only a thin layer on top of their model or their agentic system?

Similarly, why would your tool work better than a CAD company’s own agentic tool? For example, it would not be very difficult for PTC to add an Onshape co-pilot that calls the Claude Agent SDK, while PTC can also build more powerful internal tools/MCP servers for their own use without exposing them to external API users.