Tools chosen: polymarket_direct polymarket_related kalshi_related claude_news gdelt_news wikipedia code_execution

Sub-questions (Fermi decomposition)

Planner reasoning

This is a Polymarket question on whether any model reaches ≥60% on the official Humanity's Last Exam leaderboard by end of 2026. The key drivers are the current top score, the historical rate of improvement on HLE, upcoming frontier model releases, and whether the official leaderboard (agi.safe.ai) is actively updated with new results. I'll anchor on the Polymarket price, triangulate with related markets (including sibling threshold markets like 50%/70%), and research recent HLE results and leaderboard behavior.

# Current state The official resolution source (agi.safe.ai / Scale AI leaderboard) shows a top HLE Accuracy of **~46.44%** (Gemini 3.1 Pro Preview, as of 2026-08-16), still well below the 60% threshold. Third-party trackers (Artificial Analysis, llm-stats.com) report unofficial/self-reported scores of 55–65% for newer Claude "Opus 5"/"Fable 5" variants, but these are NOT reflected on the official leaderboard and are explicitly flagged as unverified self-reported results. # Timeline of key events - 2025-01: HLE launched; SOTA models scored single digits (GPT-4o 2.7%, Claude 3.5 Sonnet 4.1%) — confirmed (Wikipedia). - 2025-06: Grok-4 (with tool use) reported ~38–45% — reported (mixed sourcing on tools vs. no-tools). - 2025-08: GPT-5 reported ~25–42% depending on configuration — reported. - 2025-11: Gemini 3.0 Pro reached ~37–45%, official "highest recorded" cited as ~38.3% — reported. - 2026 (early): Official leaderboard scores clustered ~38–40% — reported. - 2026-07-09: Meta's "Muse Spark 1.1" benchmark claims disputed amid conflict-of-interest allegations — reported/rumored. - 2026-07-10: GPT-5.6 Sol/Terra/Luna launched — confirmed release, HLE scores not specified in research. - 2026-08-16: Official leaderboard snapshot: Gemini 3.1 Pro Preview 46.44%, GPT-5.4 Pro 44.32%, Muse Spark 40.56%, Claude Opus 4.6 (Thinking) 34.44% — confirmed (Wikipedia/IntuitionLabs). - 2026-08 (ongoing): Artificial Analysis reports Claude Fable 5 (55.5%) and Claude Opus 5 (54.9%) — reported, unofficial tracker, not on agi.safe.ai. - 2026-08 (ongoing): llm-stats.com reports Claude Opus 5 at 64.7%, but flags "0 verified / 101 self-reported" results — rumored/unverified. # Event Will the highest score on the official Humanity's Last Exam leaderboard (agi.safe.ai) reach ≥60% accuracy by Dec 31, 2026? # Outcomes to forecast - Yes (≥60% achieved by any model on official leaderboard) - No (highest score stays below 60%) # Kalshi market anchor No direct Kalshi YES price was returned by kalshi_direct; only a cross-listed Polymarket price for the identical event is available: **73.5% YES** (as of latest snapshot), up from 45% a month ago (+12.5% 30-day trend, flat 7-day). Volume is thin ($23,866 total over 39 days), suggesting a fairly illiquid, still-forming consensus. This should be treated as the best available proxy anchor given the missing native Kalshi quote. # Sub-question answers 1. **Current highest official HLE score** — Gemini 3.1 Pro Preview at 46.44% leads the official Scale AI/agi.safe.ai leaderboard as of 2026-08-16 [claude_news/Wikipedia/IntuitionLabs]. 2. **Trajectory of top scores** — Roughly 3–9% (Jan 2025) → ~25–45% (mid/late 2025) → ~38–46% (2026 to date). Growth has been rapid but decelerating; no model has yet crossed 50% on the *official* board [claude_news, code_execution]. 3. **Recent models near/above 60%** — Not on the official leaderboard. Third-party sites (Artificial Analysis: Claude Fable 5 ~55.5%, Opus 5 ~54.9%; llm-stats.com: Opus 5 ~64.7%) report higher figures, but these are self-reported/unverified and use possibly different methodology (tool-use, adaptive reasoning) not confirmed to match "HLE Accuracy" as officially defined [claude_news]. 4. **Leaderboard update cadence** — Updates continuously as new frontier models are verified, but with lag and a private held-out set to detect overfitting; it does not automatically absorb third-party/self-reported tool-augmented results [claude_news]. 5. **Expected 2026 releases** — GPT-5.6 (Sol/Terra/Luna), Gemini 3.7 Flash, DeepSeek V4-Pro already released or imminent per GDELT; none yet confirmed to push official HLE above 50–55% [gdelt_news]. 6. **Adjacent market pricing** — No native Kalshi ≥50%/≥70% threshold markets found; Polymarket price for this exact 60% threshold is 73.5%, implying markets lean Yes but with recent upward momentum, not settled certainty. # Key facts (high-confidence, factual) 1. [Wikipedia/claude_news] Official leaderboard top score ≈46.44% (Gemini 3.1 Pro Preview) as of 2026-08-16. 2. [claude_news] HLE launched Jan 2025 with SOTA scores in single digits. 3. [claude_news] llm-stats.com explicitly notes 0 of 101 evaluated results are "verified" — all self-reported. 4. [polymarket_direct] Polymarket price for this exact question: 73.5% YES, up sharply (+12.5pts) over 30 days. 5. [code_execution] Trend-extrapolation models disagree widely: linear fits imply 67–95%; logistic (saturating) fits imply 50–68%, straddling the 60% line. # Cross-market signals - Kalshi related: No directly comparable AI-benchmark markets found; unrelated hits (TV show release, SCOTUS case) not informative. - Polymarket: Same-event price 73.5% YES, with strong 30-day upward momentum (45%→73.5%), thin volume (~$24k) — moderate confidence signal. - Sportsbook implied: N/A. # Analyst opinions and speculation - Mid-2025 analysts predicted "50% by end of 2025" — did not materialize on official board [claude_news]. - Some commentary suggests official/third-party score gap (contamination-control private set, verification lag) may cause official scores to lag true frontier capability by many months, which could delay a Yes resolution even if capability effectively exceeds 60%. - Code-execution quantitative synthesis leans mildly Yes (~55-60% probability) but flags extreme sensitivity to model choice/tools-inclusion. # Directional lean per outcome - **Yes**: Rapid historical growth curve (9%→46% in ~20 months); multiar third-party trackers already claim 55–65%; frontier labs (GPT-5.6, Gemini 3.7, Claude Opus 5) continuing rapid iteration; Polymarket pricing 73.5%. - **No**: Official leaderboard still 14+ points below threshold with only ~4 months of 2026 lapsed at last snapshot; unofficial high scores are unverified/self-reported and may not count; logistic/saturation models suggest diminishing returns as HLE was designed to resist saturation; benchmark stewards periodically raise difficulty via private held-out sets. # Gaps / unknowns - No direct Kalshi native quote retrieved — only Polymarket cross-price used as proxy anchor. - Unclear whether official leaderboard will incorporate/verify the high third-party scores (Claude Opus 5, 54-65%) before Dec 2026. - No confirmed frontier-lab roadmap data for Q4 2026 releases. # Calibration anchors - Cross-market anchor (Polymarket, same event): 73.5% YES, rising. - Official leaderboard current top score: 46.44%, needs +13.5 points in ~4 months to resolve Yes — a steep but not unprecedented jump given historical ~10-15pt gains per 3-6 months. - Base rate precedent: HLE scores rose ~35-40 points in 20 months; achieving another 13+ points in 4 months is plausible but requires continued rapid pace.

1. Both forecasters anchor heavily on the Polymarket 73.5% price despite explicit brief warnings that it's thin-volume ($23,866 over 39 days), only a proxy (not native Kalshi), and had a sharp +12.5pt run-up in 30 days — this could reflect speculative momentum/manipulation rather than settled information, yet neither forecast meaningfully discounts for that possibility beyond a token few points. 2. Neither forecast grapples with the base-rate failure precedent explicitly flagged in the brief: "Mid-2025 analysts predicted '50% by end of 2025' — did not materialize on official board," which is a direct analog to the current situation (analysts/trackers claiming near-threshold scores that haven't yet been verified) and should push probability down more than ~10-15 points from the naive trend extrapolation. 3. Both treat the "13.5 points in 4 months" gap symmetrically with historical "10-15pt gains per 3-6 months," but understate that HLE's design explicitly resists saturation via private held-out sets and periodic difficulty increases — the brief notes recent trajectory is "decelerating" (38-46% growth has slowed vs. earlier 25-45% jumps), which argues for a logistic/saturating curve, not linear continuation. 4. Neither forecaster addresses the verification-lag mechanism concretely: even if a model's true capability exceeds 60%, the official leaderboard requires confirmed/verified submission, and with llm-stats.com showing "0 of 101 verified," there's no established base rate for how long verification takes — this operational bottleneck could mechanically cap official 2026 resolution regardless of underlying capability, and deserves more explicit weight than a single mitigating sentence. 5. Both forecasts converge tightly (0.64-0.68) despite the brief's own quantitative synthesis showing wide disagreement ("linear fits imply 67-95%; logistic fits imply 50-68%, straddling the 60% line") — this model uncertainty warrants a wider, more uncertain probability (perhaps closer to 50-55%) rather than both independently landing comfortably above 60% YES. 6. Neither forecast considers the tail scenario where a benchmark provider disputes/discredits a high score before verification (as already happened with "Muse Spark 1.1... disputed amid conflict-of-interest allegations" in July 2026), suggesting institutional friction/skepticism toward inflated scores could further delay or block a Yes resolution even if raw capability is there.

60% (56% confidence)

Yes: 60% No: 40%

The official leaderboard sits at 46.44%, requiring a steep +13.5-point gain in ~4 months on a benchmark explicitly designed to resist saturation, with the growth trajectory visibly decelerating. The critique correctly flags that both forecasts under-weighted the verification-lag mechanism (unofficial 55-65% scores are entirely self-reported, 0 verified) and the direct base-rate analog of analysts' failed '50% by end-2025' prediction, plus the thin, momentum-driven Polymarket proxy price deserves heavier discounting. However, frontier capability does appear near the threshold per multiple third-party trackers, and a single verified Q4 frontier release could clear 60% given historical 10-15pt jumps per release cycle. I pull below both forecasts toward the logistic-fit midpoint, landing at 60% YES — meaningfully below the 73.5% market anchor but respecting the genuine upside from continued rapid iteration.

Total pipeline time: 209.3s