AI News — March 5, 2026

OpenAI launched GPT-5.4 — their most capable and efficient frontier model to date, with state-of-the-art coding, computer use, tool search, and a 1M-token context window. Optimised for professional work and high-complexity tasks, GPT-5.4 replaces earlier models as the primary choice for demanding agent and coding workloads via the API.

Today's stories:

• Introducing GPT-5.4 (OpenAI News) — OpenAI launched GPT-5.4 — their most capable and efficient frontier model to date, with state-of-the-art coding, computer use, tool search, and a 1M-token context window. Optimised for professional work and high-complexity tasks, GPT-5.4 replaces earlier models as the primary choice for demanding agent and coding workloads via the API.
• Reasoning models struggle to control their chains of thought — and that's good (OpenAI News) — OpenAI researchers found that reasoning models find it difficult to manipulate or suppress their own chain-of-thought reasoning — which is actually a safety feature, not a bug. The CoT-Control study shows that model reasoning remains largely monitorable even under adversarial pressure. Important finding for anyone building safety evaluations or monitoring systems for reasoning agents.
• Common workflow patterns for AI agents—and when to use them (Claude Blog) — Anthropic breaks down three foundational agent workflow patterns — sequential, parallel, and orchestrator-subagent — with clear guidance on when each is the right choice. The post is practical and opinionated, covering tradeoffs around latency, cost, error propagation, and task complexity. One of the best concise references for anyone designing agent pipelines.
• Build Agents That Run Automatically — Cursor Automations (Cursor Blog) — Cursor launched Automations — a system for defining trigger-based agents that run automatically without a developer initiating them. Developers can set up agents to respond to events like PRs, test failures, or deploys with custom instructions. Moves Cursor firmly into the background agent space alongside GitHub Actions and CI-native AI tools.