Claude Code, from Anthropic, is perhaps the most popular agentic coding harness currently. However, it is not really designed to be used with anything other than Anthropic’s own Claude subscriptions.

To use Claude Code with Synthetic, you will need to use something like Claude Code Router, a custom script, or a tool provided by the community, as described here in the official documentation.

• Pros: Very popular, actively maintained by a large team at Anthropic. Has many advanced features such as Agent Teams and auto permissions mode.

• Cons: Very poorly vibe-coded: updates often break things; TUI is slow, flickers a lot, and does not support terminal scrollback; extreme token bloat in the system prompts, tool prompts, and feedback to the models; extreme request bloat, in terms of making a lot of requests with the various models you’ve specified as haiku/sonnet/opus alternatives. Requires custom scripts or wrappers to work with anything but Anthropic’s API.