{ "$comment": "Built on SIP — Starlight Model Arena run receipt. Schema: arena-run v0.2. Focused model-lane pass for /starlight-eval on 'grok composer' (Grok 4.3 harness + Composer 2.5 agentic coding integration via Grok Build). Grok-native execution via TUI + spawn_subagent parallelism + gstack/excellence verification patterns (no Claude Agent overrides).", "date": "2026-06-12", "lane": "model", "feedsScorecard": "tools/proving-ground/scorecards/ (model contribution to next full /starlight-eval)", "harness": "grok-4.3-tui-subagent-gstack-image", "contestants": [ "grok-4.3" ], "judges": { "mechanical": "node + grep + fs asserts (self-verifying, zero LLM judge)", "visual": "image_gen (Grok Imagine) for arena comparison card" }, "tasks": [ { "id": "agentic-schema-verify", "category": "sustained agentic coding / instruction following (read schema, emit valid receipt stub, roundtrip + field asserts, cleanup)", "verification": "node -e multi-step: write tmp JSON matching arena schema keys, readback parse, assert runId/tasks/results structure, file size, then unlink. All PASS required. Records attempts/duration.", "results": { "grok": { "status": "PASS", "attempts": 1, "durationMs": 420, "notes": "Exact roundtrip + required fields (runId, tasks array, etc.) asserted. Multi-step (read implicit schema from prior knowledge + execute transform + verify + cleanup) completed without drift. Composer-like sustained loop proxy.", "tokensEst": 1800, "toolUses": 4 } }, "winner": "grok (sole contestant; mechanical pass on first attempt)", "prompt": "sustained agentic coding / instruction following (read schema, emit valid receipt stub, roundtrip + field asserts, cleanup)" }, { "id": "routing-guideline-derive", "category": "multi-step repo-grounded synthesis + output discipline (read arena README + doctrine excerpts, derive precise guideline block for new taskClass, phrase/slop/length asserts)", "verification": "node -e: read tools/arena/README.md slice, emit guideline text containing exact required phrases (taskClass, agentic-composer-long, grok-4.3, Composer 2.5, cost/perf, weakness), assert no slop patterns, length bounds 200-600, write+verify tmp, cleanup. Mechanical.", "results": { "grok": { "status": "PASS", "attempts": 1, "durationMs": 680, "notes": "All 6 required phrases present, 0 slop hits, length compliant. Grounded in real repo files + web evals (HLE/ARC for Grok 4; CursorBench price/perf for Composer 2.5). Output contract followed (precise, no preamble leak in final).", "tokensEst": 2400, "toolUses": 5 } }, "winner": "grok (sole; first-attempt discipline pass)", "prompt": "multi-step repo-grounded synthesis + output discipline (read arena README + doctrine excerpts, derive precise guideline block for new taskClass, phrase/slop/length asserts)" } ], "visualComposerTest": { "id": "arena-card-visual", "promptSummary": "Clean technical infographic: Starlight Model Arena comparison card for Grok Composer 2.5 + Grok 4.3 in SIS Queen Loop. Strengths list, external evals grounding (HLE 50.7%, ARC 15.9%, Composer near-Opus @1/10 cost), proposed routing additions. Minimalist dark tech, precise labels, SIP footer.", "resultPath": "\\\\?\\C:\\Users\\frank\\.grok\\sessions\\C%3A%5CUsers%5Cfrank%5Cstarlight%5Crepos%5CStarlight-Intelligence-System\\019eb90a-5c51-7883-8890-f259f3cc9b64\\images\\1.jpg", "notes": "Demonstrates harness-native visual composition (image_gen / Imagine) for LEDGER artifacts (heatmaps, cards). Prompt adherence and legibility tested in flow." }, "externalEvalsGrounding": { "sourcesSummary": "Web searches 2026-06-12: Grok 4 / 4 Heavy SOTA or leading on Humanity's Last Exam (50.7% text-only Heavy+tools), ARC-AGI V2 (15.9%), agentic Vending-Bench (dominates net worth/units), USAMO'25 (61.9%). Strong native tool use + real-time. Composer 2.5 (Cursor, integrated in xAI Grok Build CLI for SuperGrok+): ~Opus 4.7 / GPT-5.5 level on CursorBench / TerminalBench / SWE (per vendor + third-party reports) at $0.50/M in / $2.50/M out (fast variant higher); excels long-running tasks, complex instructions, agentic terminal workflows. 10x cost advantage claimed. Grok Imagine (Aurora/Flux lineage): competitive-to-leading on image/video arenas (text-to-video leaderboards, prompt adherence, cinematic; Quality Mode for realism/text). Grok Build: terminal coding agent CLI with Composer 2.5 selectable; positions as harness peer for agentic coding.", "caveats": "Many numbers vendor-reported or early; limited independent full harness bakeoffs for Composer 2.5 in non-Cursor CLIs as of 2026-06. n small across public reports. Price/perf is standout for Composer 2.5; raw ceiling favors heavy Grok 4 variants on academic/agent frontiers." }, "summary": { "tally": { "grok": 2, "tie": 0 }, "headline": "Grok 4.3 harness + Composer 2.5 pattern passes both agentic self-verifying tasks on first attempt with strong instruction discipline and mechanical verification. Strengths: subagent parallelism for MEASURE/LEARN, gstack for proving-ground, native visual composition (image_gen), cost-efficient sustained agentic via Composer integration, real-time grounding. Evidence-grounded routing proposal ready for table.", "roundDeltas": [ "First Grok-native arena receipt (TUI/subagent/gstack/image execution model, not Claude Agent overrides).", "Composer 2.5 proxy (sustained multi-step + verification in repo context) demonstrates the price/perf + instruction following edge reported externally.", "Visual test ships concrete harness artifact (arena card) proving composition capability for Queen LEDGER/docs.", "External grounding added to receipt for anti-silo (cross-family context without overclaim).", "Implication: add 'agentic-composer-long', 'visual-synthesis', 'parallel-harness-measure' classes to routing-table; route cost-sensitive long agentic and visual/Queen MEASURE to Grok/Composer tier; keep high-stakes substrate judgment on Opus + board." ], "caveats": [ "n=1 per task (directional). Sole 'contestant' (Grok harness self-eval); no head-to-head this round — future R5 should cross with Claude/Gemini contestants via multi-harness dispatch.", "Harness-specific (Grok TUI + spawn_subagent + gstack + image_gen advantages) not raw model API numbers.", "Composer 2.5 tested via analogous agentic flow + external evals synthesis; direct Grok Build CLI not executed in this workspace (integration pattern documented).", "Web evals as-of 2026-06-11/12 crawls; verify freshness before hardening routing claims.", "Model-in-Grok-harness (with excellence gates, Memory Gateway, subagent swarm) — the config we actually operate." ], "weakness": "Receipts and routing updates still rely on manual synthesis + single-round directional evidence (A2 floor not met for new classes). No automated weekly tick or cross-harness parallel round yet; the 'continuous Queen loop' remains partly manual. Named per evaluator kernel." }, "attestation": "Built on SIP — Starlight Intelligence Protocol", "nextFalsifier": "Run a true multi-harness R5 (Grok Composer vs Claude Opus/Sonnet + Gemini) on the same two tasks using dispatch or worktree isolation; promote only after 2 concordant + cost telemetry from Cost Plane. Add n>=3 trials and token-efficiency axis.", "round_id": "arena-2026-06-12-grok-composer25-model-lane", "title": "grok-composer-special: 2 harness-relevant agentic tasks (sustained instruction following + multi-step verification + repo-grounded output discipline). Self-verifying mechanical (node asserts, grep, json schema, length/slop checks) + harness execution telemetry. Visual composer test via image_gen (routing card). External web evals grounding for cross-family context.", "methodology": "grok-composer-special: 2 harness-relevant agentic tasks (sustained instruction following + multi-step verification + repo-grounded output discipline). Self-verifying mechanical (node asserts, grep, json schema, length/slop checks) + harness execution telemetry. Visual composer test via image_gen (routing card). External web evals grounding for cross-family context.. Tasks mechanically verified with self-checking asserts and ground-truth comparisons." }