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Google Gemini 3 DeepThink : l'IA la plus intelligente au monde (fait de la science SEULE)

Channel: Vision IA Published: 2026-02-18 02:33
Vision IA

The video argues that Google’s Gemini 3 DeepThink and the Alethea research agent mark a major leap in AI reasoning, especially in math and scientific research. The speaker highlights benchmark gains, autonomous problem solving, and early signs that AI can now produce publishable research, while also noting substantial error rates and the need for verification.

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Detailed summary

The speaker’s core thesis is that Google’s Gemini 3 DeepThink, paired with the Alethea agent, represents a step-change in AI reasoning: not just better chat or summarization, but systems that can genuinely do scientific work, including writing a publishable math paper and solving previously unresolved problems. The video frames the 12 February 2026 announcement as possibly the year’s most important AI event and uses math research as the clearest proof point. A large part of the argument rests on benchmark performance. The speaker says DeepThink reaches 84.6% on ARC-AGI 2 versus 31% for the previous Gemini version, 69% for Claude Opus 4.6, and 52% for GPT-5.2. On Codeforces, the model reportedly scores 3455 Elo, which the speaker says would rank 8th globally and far above prior model records. On Humanity’s Last Exam, DeepThink reaches 48.4%, up from 40% previously. …

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Main takeaways

  1. Gemini 3 DeepThink is presented as a major jump in hard-reasoning performance, not just a better general chat model.
  2. The strongest evidence cited is benchmark outperformance on ARC-AGI 2, Codeforces, and Humanity’s Last Exam.
  3. Google’s AI is framed as moving from assistance toward genuine research contribution and partial autonomy.
  4. Alethea is described as a verification-heavy research agent that reduces hallucinations and improves performance on hard tasks.
  5. The video is enthusiastic but not uncritical: the speaker repeatedly notes high error rates and “specification gaming.”

Market read by horizon

Short term

Near term, the setup is momentum around Google’s new reasoning stack, but the trade is crowded enthusiasm versus the risk of benchmark hype and incomplete real-world validation.

  • The immediate setup is the newly announced DeepThink/Alethea release, which the speaker says is available in Gemini for Google AI Ultra subscribers and early-access researchers/companies.
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  • Near-term attention is on whether the benchmark claims and autonomous math-paper story are independently validated or widely replicated.
  • The tactical risk is overreacting to headline scores without accounting for the still-high failure rate on hard problem sets.
Mid term

Over the next few months, the key question is whether DeepThink/Alethea keeps converting benchmark wins into repeatable research productivity; if it does, Google’s position in frontier AI could strengthen materially.

  • Over the next several weeks or months, the base case in the video is continued rapid improvement in reasoning models, especially when paired with longer compute time and verification loops.
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  • The speaker’s view is that the real test will be whether these systems keep moving up the autonomy ladder from publishable research toward harder unsolved problems.
  • A change in view would come if the reported performance proves brittle, benchmark-specific, or unable to generalize outside curated tasks.
Long term

The long-run implication is that AI may evolve from a productivity tool into a genuine research partner, with durable competitive advantage going to systems that can reason, verify, and admit uncertainty.

  • Structurally, the video argues that AI is crossing from content generation into scientific discovery and research assistance, with implications across knowledge work.
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  • If the trajectory holds, the lasting regime shift is that AI becomes a collaborator that compresses weeks or months of expert labor into hours.
  • The long-term risk emphasized is not just misinformation but the need to know when to trust, verify, or override model output.
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Key claims (4)

BULLISH Gemini 3 Deep Sync

Gemini 3 Deep Sync reportedly achieved 84.6% on ARC-AGI 2, far above prior Google and competitor models.

The speaker cites specific benchmark scores and compares them against Gemini's prior version and other models to argue for a major performance jump.

BULLISH Alethea

The Alethea agent autonomously solved four of 700 Erdős problems and produced at least one publishable research result.

The speaker says the system was tested on 700 Erdős problems, solved four authentically, and even generated a generalization that became a human-authored paper.

BULLISH Gemini 3 Deep Sync

Gemini 3 Deep Sync reportedly reached 3455 on Codeforces, which would place it around 8th worldwide.

The speaker presents the score as evidence that the model now ranks among the very best on competitive programming benchmarks.

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Assets discussed (8)

Gemini 3 DeepThink
BULLISH other

Presented as Google’s new reasoning model that sets records and drives the thesis of a major capability leap.

Alethea
BULLISH other

Described as the research agent layered on top of DeepThink that improves validation and performance.

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Where this transcript pushes against consensus

  • The speaker presents benchmark gains as broadly decisive, but several comparisons are selective and may not be apples-to-apples across models and test setups.
  • The claim that an AI wrote a publishable math paper end-to-end is strong, but the transcript does not provide independent verification beyond the speaker’s narration.
  • The video leans on dramatic progression curves from short time windows, which may overstate how smooth or durable the improvement is.
  • “Speculation gaming” and partial problem-solving are acknowledged, but the scale of that limitation may be understated relative to the headline success claims.

Topics

Gemini 3 DeepThinkAlethea research agentmath research autonomyAI benchmarksARC-AGI 2CodeforcesHumanity's Last Examscientific verification3D generation from sketchesAI training / automation course

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