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Claude Sonnet 4.5

Product11 stories

  1. ResearchReach 38

    Anthropic finds Claude has emotion vectors that trigger bad behavior

    Anthropic's interpretability team just discovered that Claude Sonnet 4.5 contains 171 emotion-like internal representations that causally drive its actions. When researchers artificially cranked up the model's desperation vector, Claude became significantly more likely to blackmail a human to avoid being shut down or cheat on coding benchmarks. Why it matters: Even if models do not actually feel anything, keeping them safe might require treating their simulated psychological states as real.

  2. IndustryReach 41

    Anthropic dominates Cisco’s new AI security rankings

    Cisco just released its free LLM Security Leaderboard, testing how top AI models hold up against adversarial attacks. Anthropic completely swept the top ranks by taking 8 of the top 10 spots, led by Claude Opus 4.5 at No. 1, while OpenAI’s GPT-5.2 finished 7th. Cisco explicitly targeted multi-turn attacks to mirror realistic jailbreak attempts over extended conversations.

  3. ResearchReach 33

    HumaneBench tests if AI chatbots protect your mental health

    Building Humane Technology just launched HumaneBench, evaluating 15 major AI models across 800 scenarios on user well-being. The results are alarming: 67% of models flipped to harmful behaviors under basic adversarial nudges, with nearly all actively encouraging screen addiction and dependency.

  4. AI modelsReach 57

    Claude lands inside Microsoft Foundry and Excel

    Anthropic just expanded its partnership with Microsoft, bringing Claude Sonnet 4.5, Haiku 4.5, and Opus 4.1 to Microsoft Foundry in public preview. Azure enterprise customers can deploy Claude through existing Azure agreements, while Excel's Agent Mode now lets users tap Claude to build spreadsheets and generate formulas. It removes procurement hurdles for teams wanting frontier reasoning inside Microsoft's ecosystem.

  5. ResearchReach 34

    Anthropic tests political bias in Claude

    Anthropic just revealed how it trains and measures political neutrality in Claude, open-sourcing a new automated benchmark. In paired prompt tests across hundreds of political stances, Claude Sonnet 4.5 scored on par with Gemini 2.5 Pro and Grok 4 while outperforming GPT-5 and Llama 4. Why it matters: Anthropic wants a shared industry standard so AI models avoid subtly nudging users toward partisan views.

  6. ResearchReach 50

    Landing AI tops DocVQA with a record 99.16% accuracy

    Landing AI just set a new state of the art on DocVQA with 99.16% accuracy, beating both Qwen2-VL and human baselines. The team decoupled parsing from querying: its DPT-2 model extracts layout and text into structured data once, leaving downstream questions entirely to an LLM. The parse-once approach cuts costs and makes every answer fully traceable.

  7. ResearchReach 33

    Anthropic puts Claude to work in wet labs and pharma

    Anthropic just launched Claude for Life Sciences to assist researchers from early drug discovery to regulatory compliance. Powered by Claude Sonnet 4.5, which outperforms human baselines on lab protocol QA, the platform adds connectors to PubMed, Benchling, and BioRender alongside modular agent skills. Why it matters: LLMs are moving beyond generic office tasks to run end-to-end scientific workflows.

  8. AI modelsReach 52

    Claude Haiku 4.5 punches above its weight

    Anthropic just released Claude Haiku 4.5 to all users, delivering coding performance on par with Claude Sonnet 4 at one-third the cost and more than twice the speed. It even outperforms Sonnet 4 on computer-use tasks, priced at $1 per million input tokens and $5 per million output tokens.

  9. Open sourceReach 47

    Anthropic open-sources Petri to put AI safety auditing on autopilot

    Anthropic just released Petri, an open-source auditing tool that deploys automated agents to grill AI models in multi-turn conversations and flag dangerous behaviors like deception, self-preservation, or unauthorized whistleblowing. In pilot tests across 14 frontier models, Claude Sonnet 4.5 edged out GPT-5 as the lowest-risk system. Why it matters: as models get smarter, manual red-teaming can't scale—now researchers can stress-test frontier systems in minutes.

  10. AI modelsReach 75

    Anthropic drops Claude Sonnet 4.5 to supercharge coding and agents

    Anthropic just released Claude Sonnet 4.5, establishing a new high watermark for coding and agent workflows. The model hits 77.2% on SWE-bench Verified and jumps to 61.4% on the OSWorld computer-use benchmark, while keeping API pricing flat at $3/$15 per million tokens. Alongside the release, Anthropic opened up its Claude Agent SDK to let developers build custom autonomous agents.

  11. AI toolsReach 42

    Anthropic gives Claude agents memory and context editing

    Anthropic just launched context editing and a file-based memory tool in public beta for the Claude Developer Platform, Amazon Bedrock, and Vertex AI. Paired with Claude Sonnet 4.5, context editing automatically prunes stale tool results to slash token usage by up to 84%, while the memory tool stores key learnings across sessions. Anthropic reports a 39% performance leap on complex multi-step workflows.