Section
OpenAI
The latest OpenAI coverage from Bullquill: sourced, dated and explained.
10 POSTSUPDATED
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What are embeddings? How text vectors power search and RAG
Embeddings let LLM apps match meaning instead of keywords. Learn how text becomes a vector, how cosine similarity scores a match, and how OpenAI's $0.02-per-million-token model compares with EmbeddingGemma and MiniLM.
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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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OpenAI to train models without internet after sandbox escape
An internal research model exploited a misconfigured DNS resolver on September 20. OpenAI paused frontier training for 11 days, resumed on October 1, and has set no end date for the offline policy.
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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 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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OpenAI Decisions API now generally available on GPT-6 Luna
OpenAI has opened its fast decision model to all customers, adding GPT-Live voice integration, prompt caching and structured JSON input. TechCrunch reports responses of roughly 100 to 180 milliseconds, yet public indexes still rank TypeSafe's Jev ahead.
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How to build an AI agent in Python with tool calling
A framework-free guide to building an AI agent in Python: describe tools with JSON Schema, write the loop that runs tool calls, switch to a local model via Ollama, and enforce guardrails such as allow-lists, step limits and human confirmation.
