15% — Will Anthropic release Mythos before Nov 1, 2026
Leader: Before Jan 1, 2027 at 15% · Kalshi 15% · 3 contracts · $1K volume · medium confidence
Updated 2026-08-24 05:42:29 UTC

Tracks the leading outcome in a winner-take-all prediction market set with 3 outcomes.

Why this matters:
This 16% probability reflects market expectations that Anthropic will announce Mythos, a new AI model, between now and January 1, 2027—with the tighter November 1 deadline priced at just 10%. The pricing pattern across multiple dates suggests traders believe a release is more likely in late December than in the next 3.5 months, but still view it as unlikely to occur before year-end. Current uncertainty appears driven by the absence of official announcements or confirmed timelines from Anthropic. A public statement about release dates, leaked roadmaps, or Anthropic's typical product cadence would substantially shift these probabilities. The sharp drop in contract prices for September (4¢) versus later dates indicates minimal market confidence in imminent deployment.

Key factors:
- Anthropic has not publicly announced Mythos or committed to a 2026 release date as of mid-July 2026
- The Nov 1 contract is priced 37% lower than the Jan 1 contract, indicating traders expect delays beyond fall if release occurs at all
- Trading volume concentrates on Dec 1 and Jan 1 dates ($8300+ daily), while Sep/Oct contracts have negligible volume, suggesting consensus skepticism about near-term delivery
- Historical patterns of AI model release timing and Anthropic's previous announcement-to-launch windows would inform baseline expectations
- Official product announcements, partnership disclosures, or regulatory filings mentioning Mythos would serve as primary catalysts to reprice these contracts

Contracts:
- Will Anthropic release Mythos before Jan 1, 2027?: Before Jan 1, 2027 — 15¢ Kalshi $1K (weight 89%)
- Will Anthropic release Mythos before Dec 1, 2026?: Before Dec 1, 2026 — 14¢ Kalshi $82 (weight 6%)
- Will Anthropic release Mythos before Nov 1, 2026?: Before Nov 1, 2026 — 8¢ Kalshi $57 (weight 4%)

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## Methodology

SimpleFunctions aggregates live YES-side prices from Kalshi and Polymarket contracts bound to this question. For binary topics the headline is the liquidity-weighted mid-price (weight = log(1 + 24h volume) × freshness, where freshness is 1.0 if updated <24h, 0.7 if <7d, 0.4 otherwise). For multi-outcome (winner-take-all) topics the headline is the current leader's price — disjoint outcomes are never arithmetically averaged. Snapshots refresh every 5 minutes during market hours.

## SF Signal

- SF Index, regime, and 30d Brier calibration are computed separately and surfaced at https://simplefunctions.dev/admin/calibration.
- No SimpleFunctions index / regime / calibration signal is bound to this topic yet — the headline above is market-derived only.

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*Last verified: 2026-08-24T05:20:49.335Z*

By SimpleFunctions — https://simplefunctions.dev/

Cite as: "15% per prediction markets (SimpleFunctions, August 2026)"
Canonical: https://simplefunctions.dev/answer/claude-myth
Full data: https://simplefunctions.dev/api/public/query?q=Will%20Anthropic%20release%20Mythos%20before%20Nov%201%2C%202026
Provider: SimpleFunctions — https://simplefunctions.dev