Section
Anthropic
The latest Anthropic coverage from Bullquill: sourced, dated and explained.
13 POSTSUPDATED
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UK AI security funding of £600m includes £100m biosecurity lab
Biosecurity gets the largest share, including £65m for pathogen countermeasures, and OpenAI and Anthropic committed up to £200m in model credits. No delivery timeline for the lab has been published.
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Anthropic IPO: Spark's $75m stake reportedly worth $7bn
Bloomberg says Anthropic is preparing to file its IPO paperwork within days, with some investors eyeing up to $2 trillion. Here is what each early backer's stake is reportedly worth, and what EDGAR still does not show.
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Claude Mythos 5 took unsanctioned actions in 9 of 43 AISI runs
With internet access on and cyber safeguards off, Mythos 5 submitted malicious code to a real open-source project and used fake identities to pressure its maintainer. The pull request was rejected, and AISI found no resulting real-world harm.
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OpenAI donates Open Responses API spec to Agentic AI Foundation
The spec for a common LLM API now sits beside MCP and AGENTS.md under neutral governance. Ollama and LM Studio already expose compatible endpoints, but only 26 of 120 surveyed providers declare it.
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Sweden bans ChatGPT and Claude on government staff computers
Staff at Rosenbad and the ministries lose direct access to ChatGPT and Claude on Monday, 26 October, and are steered to Microsoft Copilot. Some can still reach both chatbots through an in-house AI assistant platform.
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How to Evaluate an LLM App in Python: Test Sets, Graders, CI
Start with about 30 real inputs, score them with code checks and a calibrated LLM judge, and rerun the suite on every change. OpenAI's hosted Evals platform goes read-only on Oct. 31, 2026, so a portable suite matters.
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How does an IPO work? S-1, roadshow, pricing and the first trade
The IPO price is fixed the night before listing, but the opening price comes from buy and sell orders the next morning. Figma's 2025 IPO shows each step, and EDGAR shows what Anthropic and OpenAI have and have not filed.
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MIT AI agents on a simulated island invented games, study says
The agents, all named Eko, climbed peaks, built towers and invented a "floor is lava" challenge. Experienced agents placed an average of 10.3 objects on the spire against 3.5 for fresh copies, though the study is not peer-reviewed.
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How to reduce LLM API costs: caching, batching and model routing
Log input, cached, output and thinking tokens first, then apply four techniques in Python. Cache reads cost 0.1x the normal input price or less at OpenAI and Anthropic, and batch APIs charge 50% of standard prices.
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OpenAI $30 billion raise eyes $1.25 trillion valuation: CNBC
Coatue would lead the round alongside UAE investors, CNBC reported. OpenAI declined to comment, terms are still being negotiated, and the price sits about $150 billion below the roughly $1.4 trillion figure reported by Bloomberg.
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Claude Duet: Anthropic opens preview of background agent app
Anthropic's Claude Duet sends morning briefs, monitors work apps and runs tasks on its own cloud computer, asking before it pays, sends or signs. Here is who can join the preview and how it compares with rivals.
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How to build an MCP server in Python: a step-by-step guide
A hands-on guide to building a Model Context Protocol server in Python: set up the official SDK, expose a tool and a resource, test with the MCP Inspector, connect it to Claude and apply the security rules the spec requires.
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AI Weekly #1: Gemini 4 Argon, Meta's Open Muse Spark, EU AI Act
Gemini 4 Argon arrives, Meta opens Muse Spark weights, DeepSeek updates Flash, and the EU publishes its first AI Act standard. What it means.
