HarnessRouter Community Edition is an open-source unified interface for agent harnesses. The specific release mentioned is named “HarnessRouter Community Edition.” This provides a single interface layer for working with agent harness setups, rather than being a full standalone system.
Simon Willison’s Weblog·2 months ago·
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The llm-gemini 0.33 plugin was released with support for the Gemini 3.7 Flash release and related model variants. It adds compatibility with LLM 0.32 and includes a server-side tools example using gemini-3.7-flash with CodeExecution to run a Python factorial calculation of 13. As a result, reasoning traces can be viewed and server-side tools can be enabled, but a Safari-rendering issue can make the pelican SVG missing in Firefox and Chrome.
IBM announced a partnership with OpenAI to market OpenAI models and tools to more enterprise customers via IBM Consulting. IBM will train and certify tens of thousands of consultants over the next several months, including on OpenAI’s Codex, API, and cybersecurity. The change expands IBM Consulting’s OpenAI-focused delivery—through dedicated practices and integrating models like GPT-5.6 into IBM Consulting Advantage—boosting OpenAI enterprise distribution through IBM’s consulting network.
The builder’s guide explains how startups can use GPT‑5.6 to build AI agents more efficiently. It highlights new “Responses API” capabilities as a key concrete change. As a result, teams can select models smarter and use the API to make their agents faster and lower cost.
OpenAI introduced a new API service tier, called Ultrafast, that runs GPT-5.6 Sol at speeds up to 14× faster. It can deliver up to 750 output tokens per second. Developers can choose this tier for higher-throughput GPT-5.6 Sol responses.
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