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99 entries
Also on 10 November 20262 new models · 2 leaderboards with a new leader · 3 charts with new data · 6 new charts
  • Model

    Anthropic · Public. Same model as Mythos 5.2, with cyber and biology safeguards. $8 in / $40 out per million tokens, less than Fable 5.1. Leads Epoch's capability index (174.2) and ARC-AGI-3 (81.2%).

  • Model

    Anthropic · Limited preview. Same model as Fable 5.2 with fewer cyber and biology safeguards. Only for vetted cyber-defence and life-science organisations.

  • New leader

    Epoch Capabilities Index: 174.2 points (before: GPT-6 Astra) · ARC-AGI-3: 81.2% (before: GPT-6 Astra (Max))

  • New data

    Noted that METR's November audit puts AI speeding up AI research at about the scenario's March 2027 level, ahead of the August grade.

  • New data

    Added Claude Fable 5.2: 81.2% with the standard harness, up from GPT-6 Astra's 62.7%.

  • New data

    Added Claude Fable 5.2: 95.1% on Tiers 1–3 (a new high, within the margin of error of the previous 93.7%) and 100% on Tier 4.

  • New chart

    Artificial Analysis combines about ten tests of reasoning, coding, knowledge work and agent tasks into one score out of 100. It is one of the most quoted single numbers for how capable a model is.

  • New chart

    What the most capable model cost on the day it came out. A million tokens is roughly 750,000 words of input and output.

  • New chart

    What it costs to use an AI at least as capable as Claude Opus 4.6, judged by Epoch AI's index of more than 50 tests. A million tokens is roughly 750,000 words of input and output.

  • New chart

    What it costs to use an AI at least as capable as Claude Opus 4.8, judged by Epoch AI's index of more than 50 tests. A million tokens is roughly 750,000 words of input and output.

  • New chart

    What it costs to use an AI at least as capable as GPT-5.6 Sol, judged by Epoch AI's index of more than 50 tests. A million tokens is roughly 750,000 words of input and output.

  • New chart

    What it costs to get answers as good as o3's (April 2025) on hard science questions. Unlike price per token, this counts every token a model actually uses, including the hidden 'thinking' tokens of reasoning models.

Biology & Medicine

AI designed 16 working viruses that attack bacteria

AI designed whole genomes for viruses that infect only bacteria; 16 of hundreds built worked. Such viruses may stand in for antibiotics.

16AI-designed viruses that worked (Science, August 2026)

Milestone4 sources
Myths

Myth check: “AI progress has hit a wall”

Verdict: False

AI kept improving fast through 2026, from 4-minute tasks in 2023 to 12-hour ones. Just making models bigger did slow, and real use lags.

Myth check5 sources
Myths

Myth check: “MIT found 95% of AI pilots fail”

Verdict: Misleading

The 95% rests on 52 interviews and a 153-person survey with a strict test of success. It points to a real problem, not a measured rate.

Myth check3 sources