llm-openai-decisions 0.1a0

Simon Willison released llm-openai-decisions 0.1a0, an LLM plugin for OpenAI's new Decisions API, which OpenAI announced at last week's DevDay. The plugin, built by GPT-6 Astra reading the OpenAI API documentation and inspired by Willison's llm-typesafe plugin for Jev, supports the same three question types as Jev (yes/no, choices, scores) and adds image input via the gpt-6-luna decision model. OpenAI charges 10 cents per million input tokens and nothing for output, versus Jev's 4.2 cents per million input tokens.

Release: llm-openai-decisions 0.1a0 https://github.com/simonw/llm-openai-decisions/releases/tag/0.1a0 OpenAI released their new Jev-style Decisions API https://developers.openai.com/api/docs/guides/decisions , as previously announced at last week's DevDay. Since I already have an llm-typesafe https://github.com/simonw/llm-typesafe plugin for talking to Jev, I had GPT-6 Astra read the new OpenAI API documentation and build an llm-openai-decisions plugin inspired by llm-typesafe . Unlike Jev, the new gpt-6-luna decision model supports image input in addition to text. Both models charge for input it and not for output: OpenAI's is 10 cents per million input tokens, Jev's is 4.2 cents per million. Otherwise the API shape is very similar to Jev, at least conceptually. Jev supports three question types https://simonwillison.net/2026/Sep/21/jev/ three-types for yes/no, choices, or scores. OpenAI Decisions supports the same three types. Install the plugin like this: llm install llm-openai-decisions Here's an example query against an image attachment: llm -m openai-decisions/gpt-6-luna \ -a https://static.simonwillison.net/static/2025/two-pelicans.jpg \ -s 'Does this image contain any mammals?' And example output: {"type": "predicate", "name": "evaluation", "probability": 0.0} Consult the README https://github.com/simonw/llm-openai-decisions/blob/main/README.md for full details of how to run the other types of questions. Tags: openai https://simonwillison.net/tags/openai , llm https://simonwillison.net/tags/llm , coding-agents https://simonwillison.net/tags/coding-agents , jev https://simonwillison.net/tags/jev