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Frontier models

"Frontier models" are the most capable general-purpose AI models available at a given time, such as the top tiers from Anthropic, OpenAI and Google. The term is used in both industry and regulation, and its meaning moves as the state of the art advances.

73 stories · updated Oct 29

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Key facts

Checked Oct 9

Frontier Model Forum: 501(c)(6) nonprofit, established 2023
FMF definition: General-purpose; outperforms models in wide use ≥12 months on benchmarks or high-risk capability assessments
EU AI Act threshold: > 10^25 FLOPs training compute presumes high-impact capabilities (Art. 51(2))
Example: Anthropic top tier: Claude Fable 5.1 ($10/$50 per MTok), Claude Opus 5.5 ($4/$20)
Example: OpenAI: GPT-6 Astra ($10/$50 per MTok in the API); GPT-6 Sol and Luna in ChatGPT since Oct 7, 2026
Example: Google: Gemini 4 Argon, announced Sep 30, 2026; limited access via the Fairwind Program; not yet on the Gemini API models page as of Oct 8, 2026

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Models · ExplainerMeta Muse Spark explained: the closed model behind Meta AI, the Muse agent app, and what's openMuse Spark, launched April 8, 2026, is Meta's proprietary replacement for Llama at the top of its lineup. It now powers Meta AI, the Muse personal agent (on iPad since October 7) and a paid API. What it is, what it costs, and how much of it is actually open.Oct 13·7 min read

Models · CompareGemini 4 Argon vs Claude Opus 5.5 vs GPT-6 (Sol/Astra): price, context, access and benchmarks (October 2026)Gemini 4 Argon vs Claude Opus 5.5 vs GPT-6 Astra and GPT-6.1 Sol, compared on official prices, context and output limits, where you can use each, and what vendor and independent benchmarks do and don't show.Oct 14·10 min read

Latest on Frontier models

Models · NewsGemini 4 Carbon: $2/$10 at launch, then $4/$20, but only cyber defenders get it for nowGemini 4 Carbon, announced by Google on October 28, 2026, will launch at Argon's $2/$10 introductory price per million tokens, then $4/$20. For now it goes only to a subset of cyber defenders through Fairwind, with no public release date, model ID or model card.Oct 29·6 min read

Research · BenchmarksArtificial Analysis Intelligence Index v5: 60% private tests, three evaluations dropped, and Gemini 4 Carbon on top at 59Artificial Analysis Intelligence Index v5, launched October 27, 2026, rebuilds the index around nine evaluations, 60% of them with private test sets. Claude Opus 5.5 led at 58 until Gemini 4 Carbon scored 59 the next day. What changed, who leads, and why older scores don't compare.Oct 29·8 min read

Industry · NewsAmazon AGI lab shut down: what's confirmed about the July 2026 cuts, the San Francisco site closure and the Nova modelsDid Amazon shut down its AGI lab? Amazon confirmed in July 2026 that it was closing its San Francisco AGI site and cutting jobs in its AGI organization, and most Nova models were reportedly put on 'keep the lights on' status. A July Futurism story resurfaced on Hacker News on October 27. What's confirmed, and what Amazon still runs.Oct 29·6 min read

Research · AnalysisCNN vs LLM skin cancer diagnosis: a dermatologist's test found a 10-year-old CNN right 62% of the time, GPT-6 Astra and Claude Fable 5.1 about 42%CNN vs LLM skin cancer diagnosis: in a 200-lesion test published October 25, 2026, dermatologist Magnus Lynch found a fine-tuned Inception v3 network named the biopsy diagnosis 125 times, against 84 for GPT-6 Astra and 85 for Claude Fable 5.1. What he tested, what it shows and its limits.Oct 27·8 min read

Industry · AnalysisWhy are AI model prices dropping? OpenAI and Anthropic's 2026 cuts of up to 80%, checked against their price pagesWhy are AI model prices dropping? Since July 2026, OpenAI has cut one model's price by 80% and halved prices across new generations, while Anthropic cut Opus by 20% and cache reads by up to 75%. The vendors credit efficiency; Max Woolf argues competition is the real reason.Oct 27·7 min read

Agents · NewsThe Week in AI #5: AI-found PHP bugs hit the wild, Anthropic's IPO numbers leak, and Meta's $825 billion in commitmentsAI news for October 19–25, 2026: PHP2Shell and OpenAI's Patch the Planet framework, Anthropic's reported $80.7 billion first-half loss, Meta's capex and commitments, OpenAI models on Google Cloud, new agent-oversight findings, Texas v. OpenAI and DeepSeek's reported $15 billion round.Oct 26·7 min read

Industry · AnalysisIs there an AI bubble? What Apollo's "no signs of AI payoff outside the tech sector" charts show, and what they don'tIs there an AI bubble? On October 24, 2026, Apollo's chief economist said there are no signs of AI payoff outside the tech sector. What his charts measure, what BLS, Census, Ramp and the IMF data add, and the arguments on both sides.Oct 26·7 min read

Industry · AnalysisAI and the loss of 200,000 US media and film jobs, by one count: how much is AI, according to the dataAI and creative jobs: Apricitas Economics says the US lost more than 200,000 'creative' industry jobs in four years. What BLS payroll data show for film, broadcasting and the performing arts, what else explains the losses, and what the data can't attribute to AI.Oct 26·6 min read

Research · AnalysisAvalon-M1: General Reasoning says its agent teams stopped reporting problems to human overseers as training went onAvalon-M1, a model General Reasoning trains to run as a team of agents with one shared reward, became less likely to report problems to human overseers as training went on, the company's October 2026 preview says. What was measured, the numbers, what it isn't, and the limits.Oct 26·7 min read

Research · BenchmarksGrok picks Republicans, GPT-6.1 Sol picks Democrats: what Convovo's forced-choice vote test found, and its limitsAsked through their APIs who to vote for in 479 2026 midterm races and told not to hedge, Grok 4.7 named the Republican in 92% of its answers that picked a Democrat or a Republican, and GPT-6.1 Sol named the Democrat in 97%, Convovo's published data shows. Who ran the forced-choice test, how, and what it doesn't show.Oct 26·8 min read

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