systima

How does this differ to Spec Kit / BMAD / etc?

We are using Claude Max with OpenCode. See the post for details.

We've updated the post now!

UPDATE – 13/07/26:

1) We have added a repository reproducing the methods.

2) We have commented on output quality in the post (in addition to tokens/cost).

3) Per a previous update, we now handle Fable 5 in the post.

UPDATE:

After reading PUSH_AX's valid comment: ``` This is like saying contractor (A) asked for $33,000 to undertake the work and contractor (B) asked for $7,000 Are we measuring and caring about the right thing? ``` We will update the post to include:

1) A more in-depth task. 2) Qualitative results comparison. 3) As soon as possible, a reproduction of the inputs and outputs.

Anecdotally, the results from OpenCode + Claude appear to be the same if not better for our uses over the past year.

We have never read your blog or your content before.

Suspect that many have covered the "Comparing agentic coding tools" angle before, and that the differentiator is depth of analysis + conclusions.

We are yet to try Pi!

Model:

Cost, mainly. The runs went through a Claude Max subscription rather than metered API billing, and pinning an older stable snapshot kept run-to-run comparisons clean and cheap. The fixed harness payload (system prompt plus tool schemas), so the headline numbers shouldn't change too much.

That said, happy to re-run the matrix on Fable and publish the diff; payload figures should barely move, tool-calling behaviour might.

Gateway:

Meridian (github.com/rynfar/meridian); proxy that bridges the Claude Code SDK to a standard Anthropic endpoint so a Claude Max subscription can drive OpenCode-et-al.

It's the auth route for all agent traffic on the machine, not something built for the benchmark.

Is this allowed under Apple's ToS?

I recall the Beeper Mini debacle not so long ago, and fear that this may be a house built on sand.