<?xml version="1.0" encoding="UTF-8"?><rss version="2.0"><channel><title>MrJev: Jev changelog</title><description>Jev model releases, pricing changes, and SDK updates.</description><link>https://mrjev.com</link><item><title>Python SDK 0.7.0 switches to Pydantic</title><link>https://mrjev.com/changelog/#2026-09-18-python-sdk-0-7-0</link><guid isPermaLink="true">https://mrjev.com/changelog/#2026-09-18-python-sdk-0-7-0</guid><description>Breaking change: the SDK now uses Pydantic instead of msgspec for serialization. `system_one()` gains a `response_model` argument that parses answers into your own Pydantic model. Also fixes `str` subclasses being serialized as lists of characters.</description><pubDate>Fri, 18 Sep 2026 00:00:00 GMT</pubDate></item><item><title>TypeSafe documents Jev 1.13&apos;s known weak spots</title><link>https://mrjev.com/changelog/#2026-09-17-jev-1-13-jaggedness</link><guid isPermaLink="true">https://mrjev.com/changelog/#2026-09-17-jev-1-13-jaggedness</guid><description>A new docs page lists nine failure modes of `jev-1.13`, including literal reading of instructions, arithmetic and counting, date comparison, multi-hop indirection, large distracting state, adversarial content, and text generation, with a recommended workaround for each.</description><pubDate>Thu, 17 Sep 2026 00:00:00 GMT</pubDate></item><item><title>TypeSafe launches Jev, the first System One model</title><link>https://mrjev.com/changelog/#2026-09-15-jev-launch</link><guid isPermaLink="true">https://mrjev.com/changelog/#2026-09-15-jev-launch</guid><description>TypeSafe AI announced Jev, a model that returns typed decisions (Choice, Score, and Noul) with calibrated probabilities instead of generated text. Access opened through an early-access waitlist. Pricing is $0.042 per million input tokens, and output tokens are free.</description><pubDate>Tue, 15 Sep 2026 00:00:00 GMT</pubDate></item><item><title>JavaScript SDK 0.6.0</title><link>https://mrjev.com/changelog/#2026-09-15-js-sdk-0-6-0</link><guid isPermaLink="true">https://mrjev.com/changelog/#2026-09-15-js-sdk-0-6-0</guid><description>Breaking change: `Score` criteria are now passed as an ordered array instead of an object keyed by integers. Install with `npm install @typesafe-ai/sdk`.</description><pubDate>Tue, 15 Sep 2026 00:00:00 GMT</pubDate></item><item><title>TypeSafe AI emerges from stealth with a $40M seed round</title><link>https://mrjev.com/changelog/#2026-09-15-seed-funding</link><guid isPermaLink="true">https://mrjev.com/changelog/#2026-09-15-seed-funding</guid><description>The round was led by DCVC. TypeSafe was founded in 2024 by Diogo Almeida (formerly of OpenAI), Erik Gafni, and Sasha Sheng, and is based in San Francisco.</description><pubDate>Tue, 15 Sep 2026 00:00:00 GMT</pubDate></item></channel></rss>