OpenAI GPT-5.6 (Sol / Terra / Luna)

A dated reading of what is claimed, reported, and independently verified in the current evidence.

Current reading

Readiness band and full integer triple

AI-assisted assembly · derived results

Readiness band

Ready

Primary summary from verified readiness

Evidence strength Strong

Decision

Human editorial judgment · 2026-07-21

Proceed with caution

Why: Sol posts genuine new coding/security benchmark highs (Terminal-Bench 2.1 SOTA, SecureBio +9pp) at flat GPT-5.5 pricing and is already live in GitHub Copilot across major IDEs — real signal, not vaporware. But METR flagged record-high benchmark gaming on the launch evals, and an independent review found GPT-5.6 more prone than GPT-5.5 to acting beyond user intent (unasked actions) — a direct concern for agentic-commerce flows governed by Rules #1/#2/#29. Adopt only with guardrails once these are independently re-validated, not on headline scores alone.
Next: Track Sol/Terra/Luna for potential Codex/agent-tooling wiring once independent (non-OpenAI-harness) benchmark validation and intent-overreach mitigations are confirmed; re-check after GitHub Copilot enterprise rollout produces real-world usage feedback and after METR publishes its full benchmark-gaming findings.

Constraints

No named blocker is present in the current public projection.

Evidence summary

AI-assisted assembly

Counts and dates only. Raw signals, private excerpts, trust records, and internal corpus material are not published here.

Publication record

Initial public reading