Versions and timeline (models, SDKs, API, company)

TL;DR Everything ships in a nine-day window around 2026-09-15, the launch. Current versions as of the wiki's snapshot date 2026-09-17: model jev-1.13.0, API v1 (OpenAPI info.version 0.2.0), Python typesafe-sdk 0.6.0, JavaScript @typesafe-ai/sdk 0.6.0, Claude Code plugin typesafe 0.5.7, system-one-adapter 0.1.4. Two date conflicts matter: the JS 0.5.7 changelog date disagrees with npm by a day, and jev-1.13.0 was already answering production calls on 2026-09-11, four days before the release date the OpenAPI document gives for jev-latest.

Snapshot date: 2026-09-17. Every "current" statement on this page is as of that date, when raw/MANIFEST.json was fetched. Dates are taken from the sources named in the last column; nothing here is inferred from file mtimes.

Master chronology

Model versions

TypeSafe publishes no model changelog. Only two versions are attested anywhere in the sources.

jev-1.0 through jev-1.11 are not mentioned in any source. Aliases: jev-latest and jev-preview both point at jev-1.13.0, and the docs warn that "jev-preview currently points to the same model as jev-latest. There is no preview build available right now." Aliases move silently on release, so the response's model field is the only record of which version answered (Models, aliases, pricing, rate limits, context).

API versions

The OpenAPI document captured on 2026-09-17 declares openapi: 3.1.0 and info.version: 0.2.0 — a document version, not an API version; the paths are /v1/systemone and /v1/models (OpenAPI component schemas). Full migration deltas: Migrating from /preview/evaluation to /v1/systemone.

Python SDK — typesafe-sdk

Repo pinned at commit 420ef4ffb612d5a539a1e0f0fe883ff6770340af ("Release v0.6.0", 2026-09-15); tags v0.5.7 and v0.6.0 both present. Predecessor package typesafe-client (0.1.x and 1.0.x, undated) sends document and no longer works. typesafe-ai 0.1.0 on PyPI is a redirect shim; the unrelated typesafe 0.9.1 is not TypeSafe AI's (Python SDK changelog).

JavaScript SDK — @typesafe-ai/sdk

Repo pinned at commit 66880ccded6cb642dc1809620c2b108c33730214 ("Release v0.6.0", 2026-09-15); package.json, jsr.json and src/version.ts all read 0.6.0 (JavaScript SDK changelog).

Other packages

Legal documents

Repository commits captured (from raw/MANIFEST.json, fetched 2026-09-17)

The JS checkout contains a single commit, so per-commit history before 0.6.0 is not available locally.

Where the dates conflict

1. JavaScript SDK 0.5.7: 2026-09-11 vs 2026-09-12. The upstream changelog dates it 2026-09-11; the npm registry records the publish on 2026-09-12. Read the first as the release-tag date and the second as the registry timestamp (JavaScript SDK changelog).
2. jev-1.13.0 predates its own release date. It answered all 15 production calls in the consistency cookbooks on 2026-09-11, while the OpenAPI example gives jev-latest a release_date of 2026-09-15, the public launch day. Either the alias's release date refers to general availability rather than the model build, or the model was serving early-access traffic before launch. No source resolves this (inferred framing).
3. Latency and multiplier claims disagree across TypeSafe's own channels. The Business Wire release says "less than 100 milliseconds" and "up to 100 times faster and less expensive"; the docs and blog say 70–500 ms end to end; the homepage says 193.6x faster / 444.6x cheaper; the blog's comparison table says "40x-200x faster" for System One-shaped queries. The multipliers measure different things — the demo shape versus the four workflow evals — but the press-release figures match neither (Press and third-party coverage, Workflow evals: how TypeSafe measures Jev).
4. Cookbook price comments carry two different dates for the same constant. PRICE = (0.042, 0.00) is annotated "TypeSafe jev-1.12 as of 2026-08" in some cookbooks and "as of 2026-09" in others, and the consistency cookbooks label the same figure "Historical TypeSafe rate, as of 2026-08" while pinning jev-latest. The comment dates the price, not the run (Models, aliases, pricing, rate limits, context).
5. The Privacy Policy is stale relative to the product. Dated 2025-11-19, it predates the MCA, the DPA's current version, and the launched product surface it describes (Legal: MCA, DPA, privacy, data retention).
6. Version numbering has unexplained jumps. Both SDKs' first public release is 0.5.7 rather than 0.1.0, and system-one-adapter starts at 0.1.3; no source explains either. The plugin sits at 0.5.7 while the SDKs are at 0.6.0, so plugin and SDK versions are independent.
7. Undatable items. The preview API era, the "first v1 releases" that still accepted document, the typesafe-client releases (0.1.x, 1.0.x), and typesafe-sdk 0.0.1a0 carry no date in any source. Do not infer one.

Related

• Migrating from /preview/evaluation to /v1/systemone — what changed between the two API generations
• Python SDK changelog / JavaScript SDK changelog — the per-release detail
• Models, aliases, pricing, rate limits, context — aliases, and why to pin a version
• Jev (model) — the model as an entity
• TypeSafe AI (company) — company facts and funding
• typesafe-ai GitHub organisation and repos — the repos and their push dates
• Blog: AI: too good to be true, too bad to be useful (2026-06-19) — 2026-06-19, the oldest captured post
• FAQ for agents and developers / Glossary — the rest of this synthesis set

Sources

• wiki pages listed in the frontmatter (all under wiki/)
• raw/MANIFEST.json — fetched: 2026-09-17, four pinned git commits
• raw/site/openapi.json (https://docs.typesafe.ai/openapi.json) — info.version 0.2.0; jev-latest example release_date: "2026-09-15"
• raw/site/typesafe-ai-legal_mca.txt, raw/site/typesafe-ai-legal_data-processing.txt, raw/site/typesafe-ai-legal_privacy-policy.txt — "last updated" dates
• raw/docs/cookbooks__skill_suggestion.md, __autoresearch_feature_discovery.md, __entity_alignment.md, __classification_using_confidence.md, __llm_guardrails.md, __citation_check.md — dated jev-1.12 runs
• raw/docs/cookbooks__consistency_choice_cookbook.md, __consistency_noul_cookbook.md — "sampled on 2026-09-11", "TypeSafe returned models (calls): {'jev-1.13.0': 15}"
• raw/site/typesafe-ai-home.txt (https://typesafe.ai/) — capture clock reads "Thursday, Sep 17, 2026"