DSPy 3.4.0 adds native System One model support with new ReAnchor optimizer
dair_ai · x · 2026-09-26
DSPy 3.4.0 is out, bringing native support for System One models like Jev via compatible signatures, plus a new optimizer, ReAnchor, for calibrating outputs with confidence.
DAIR.AI shares hands-on results building custom agent harnesses:
- System One models (numeric-only judgments, no text) fit naturally into harness decisions
- Proven uses: guardrails, routing, and verifiers—cheap enough to run every step
- Explorations: structuring/optimizing skills, efficient tool calling, dynamically generated orchestrator+subagent workflows, better agent coordination
A companion tutorial, "Building a Custom Harness with Pi and Jev," shows model selection, blocking risky tool calls, and self-verification with the Pi SDK—a practical reference for low-cost agent engineering.
Related event: DSPy 3.4.0 ships native Jev/System One support and ReAnchor optimizer(10 posts)→
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