Our team was grateful for the opportunity to meet with PM @narendramodi and Minister @AshwiniVaishnaw to discuss India's AI future. We're keen to work together to advance the country's digital ambitions and support the AI Summit in February 2026.
@anthropicai
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Anthropic CEO meets Indian PM, expands India AI team
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Anthropic CEO Dario Amodei met today with Prime Minister @narendramodi
. We're looking forward to growing our Indian team and supporting India's AI ecosystem as it develops the next generation of dynamic companies. -
Small Fixed Data Can Poison Any Size LLM Model
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Previous research suggested that attackers might need to poison a percentage of an AI model’s training data to produce a backdoor. Our results challenge this—we find that even a small, fixed number of documents can poison an LLM of any size. Read more:
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Data-Poisoning Attacks Threaten LLMs Regardless Size
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New research with the UK @AISecurityInst and the @turinginst
: We found that just a few malicious documents can produce vulnerabilities in an LLM—regardless of the size of the model or its training data. Data-poisoning attacks might be more practical than previously believed. -
Major Tech Company Opens Bengaluru Office for AI Development
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We’re opening an office in Bengaluru, India in early 2026. We look forward to building with India’s developer community, deploying AI for social benefit, and partnering with enterprises. Read more:
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Petri Open-Source AI Safety Research Tool Released
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Petri is open-source and available now: http://
github.com/safety-researc
h/petri
… Read the full technical report: https://
alignment.anthropic.com/2025/petri -
Petri Framework Advances AI Model Safety Assessments
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Petri builds on our alignment assessments in the Claude 4 and 4.5 System Cards; the @AISecurityInst also successfully built on a pre-release version of Petri for their assessments of our models.
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Petri Demonstrates Capabilities Testing 14 Frontier Models
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As a pilot demonstration of Petri’s capabilities, we tested it with 14 frontier models across 111 diverse scenarios.
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Anthropic Open-Sources AI Audit Tool for Claude Sonnet 4.5
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Last week we released Claude Sonnet 4.5. As part of our alignment testing, we used a new tool to run automated audits for behaviors like sycophancy and deception. Now we’re open-sourcing the tool to run those audits.
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Petri: Automated Agent Tool Audits AI Models Across Scenarios
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It’s called Petri: Parallel Exploration Tool for Risky Interactions. It uses automated agents to audit models across diverse scenarios. Describe a scenario, and Petri handles the environment simulation, conversations, and analyses in minutes. Read more: