**22 October 2026 — DAILY BRIEF**  
*Frontier weather: Proactive agents and production inference stacks move into the open while measurement of human modeling lags coding gains; AA Index v4.3.2 remains the clean composite board.*

**Frontier & markets.** Anthropic opened a research-preview waitlist for Claude Duet (21 Oct), a proactive Opus 5.5 agent on its own cloud computer. It messages first, monitors connected apps, and requires approval before send/pay/sign/delete actions. Available to US Pro/Max only (shares plan limits; no Team/Enterprise yet). Confirmed via Anthropic announcement and coverage. Google Cloud began private preview of OpenAI’s GPT-6 Astra, GPT-6.1 Sol and GPT-6 Luna (21 Oct). Confirmed. Gemini 4 Argon remains GA at introductory $2/$10 per million tokens through 30 Nov, then $4/$20. Meta’s Muse Wonder / Wonder Full (12 Oct) and Anthropic’s Haiku 5.5 (7 Oct, $0.10/$0.50 up to 100k) continue to expand the mid-tier. Artificial Analysis Intelligence Index v4.3.2 (as of 22 Oct) has Claude Opus 5.5 (max) at 57.6, Sonnet 5.5 (max) at 56, Muse Wonder Full (max) at 55.8. Do not mix with prior Index versions. Saturated or heavily audited boards (SWE-bench Verified, older Terminal-Bench) are not used for ranking. Reported/confirmed from AA public data and lab announcements.

**Science of intelligence.** Rehearsals, Google DeepMind and Kaggle launched Human Behavior Bench (20 Oct). Ground truth from 1,244 US adults (June–Sept 2026, 95k responses, 80% private holdout) across health, habits, decision-making and values. Scored by distribution agreement (1-TVD). Rehearsals Engram 1.0: 94.1; Gemini 4 Argon: 80.6; GPT-5.6 Sol: 79.5; Claude Opus 5.5: 79.3; Gemini 3.8 Flash: 79.1; GPT-6 Astra: 79.0; Grok 4.6: 76.2. Models converge to the mean; real preference distributions vary. Confirmed via Rehearsals/Kaggle primary posts and site. This is the clearest public measurement this week of how frontier models model humans versus specialized twin systems. ARC Prize continues verifying ARC-AGI results: DeepSeek V4.1 Flash 1017 reached 78.1% on ARC-AGI-2 ($0.16/task); Gemini 4 Argon shows large harness sensitivity on ARC-AGI-3 (97.5% provider adapter vs incomplete standard runs). Reported by ARC Prize.

**Engineering.** DeepSeek open-sourced DeepInfer (20 Oct, Apache 2.0), the offline inference engine behind V4.1-Flash production. Supports NVIDIA SM100 and Huawei Ascend 950; one cluster claimed to serve 155T tokens/day. Excludes full KV-cache layer, disaggregated serving and replica load-balancing. Confirmed via DeepSeek GitHub and lab statements. Recursive released Flint (21 Oct), an open-weight 40B-A2.5B coding model largely developed by its automated research system. Confirmed. Terminal-Bench 4.0 and OSWorld 2.1 remain the active long-horizon boards; older versions are not comparable. Labs continue to de-emphasize saturated coding boards after audits found substantial task flaws.

**Political / legal / social.** US, EU and China maintain divergent approaches. US relies on voluntary industry pledges (White House Accord of 29 Sep) and the Super Intelligence Force; EU AI Act transparency rules are active, high-risk obligations deferred; China emphasizes state monitoring and “AI Plus” integration. No single binding global regime. Reported in multiple policy analyses (22 Oct). Anthropic’s protein-binding work and OpenAI monitoring reports remain under lab system cards; no new primary regulatory text today.

**Watchlist hits with primary links.**  
- Claude Duet: https://claude.com/resources/articles/claude-duet  
- Human Behavior Bench: https://www.runrehearsals.com/human-behavior-bench and Kaggle  
- DeepInfer: DeepSeek GitHub (deepseek-ai/DeepInfer)  
- AA Index v4.3.2: artificialanalysis.ai  
- ARC Prize results: arcprize.org/results  

**Ledger actions.** AA Index v4.3.2 is stable; Opus 5.5 (max) holds the composite lead. No new Frontier label change today—task-specific boards still required. Efficient label candidates include Haiku 5.5 and DeepSeek V4.1-Flash-1017 on cost-per-task curves once independent verification of DeepInfer throughput is available. Budget tier expands via open inference stacks and low-price Flash models. Five-benchmark atlas (AA composite + Terminal-Bench 4.0 + OSWorld 2.1 + ARC-AGI-2/3 + Human Behavior Bench) would benefit from adding the new human-modeling board and dropping any remaining saturated coding scores. Price and availability events (Duet limits, Gemini promo window, DeepInfer open-source) are first-class.

**Sources.** Anthropic Claude Duet page; Rehearsals/Kaggle Human Behavior Bench; DeepSeek DeepInfer repository and statements; Artificial Analysis public Index and X updates; ARC Prize results and posts; lab model cards and pricing pages for Gemini 4 Argon, Haiku 5.5, Muse Wonder; policy summaries from East Asia Forum, VOA and related analyses (22 Oct).

Ask Intelligence Radar a task for a Task Router ticket (5 benchmarks → Frontier / Efficient / Budget + optional decomposition).