About sourc.dev

What sourc.dev is

sourc.dev is a data observatory for the AI and developer ecosystem. We track language models, AI tools, software products, and open data APIs — measuring pricing, uptime, capability, and change over time. Every data point has a source URL and a verification date. Nothing is estimated. Nothing is sponsored. The data is the product.

How data is tracked

Every entity on sourc.dev is a structured record with typed attributes. A language model entry tracks input price per million tokens, output price, context window size, whether weights are open, EU data residency status, and more. An AI tool entry tracks pricing tier, the LLMs it depends on, API availability, and open source status.

The pipeline checks primary sources daily. When an attribute changes — a price drop, a new model version, a rate limit update — the change is scored against structural bounds. Changes within expected ranges are auto-approved and written to the history table. Changes that exceed bounds go to a human review queue.

Every change is appended to the history table. Nothing is overwritten. The timeline is the asset.

Who operates this

sourc.dev is operated by Fredrik Kallioniemi, founder of HODLR & CO Labs, based in Sweden. The site is built with Claude Code, deployed on Cloudflare Pages, and backed by a Supabase Postgres database. The pipeline runs on Cloudflare Workers.

This site is AI-assisted. Data collection, change detection, and description generation use Claude API. All published data is verified against primary sources before appearing on the site. Human review is the final gate.

Attribution and data use

Data on sourc.dev is free to browse. If you cite sourc.dev data, please include the entity name, the attribute, the value, and the verification date shown on the page.

Example: "GPT-4o input pricing: $2.50 per million tokens (sourc.dev, verified 2026-03-24)"

The structured data and historical time series are available via API under commercial licensing. Contact us via the submit form.

What we track

input_price_per_1m

Cost to send one million tokens to a model

output_price_per_1m

Cost to receive one million tokens from a model

context_window

Maximum tokens a model can process in one call

drift_index

How much a model's behaviour has changed over time (sourc.dev proprietary metric, tracked via canary prompts)

uptime

Rolling availability of an API endpoint

eu_data_residency

Whether data is processed within the EU

open_weights

Whether model weights are publicly available

api_rate_limit

Maximum requests per minute on free and paid tiers

verified_at

The date sourc.dev last confirmed this data point against its primary source

What is coming

sourc.dev launched in March 2026 with 30 language models tracked at depth. The roadmap:

• Month 1 — 30 LLMs with generational history and full attribute coverage
• Month 2 — AI tools directory: code assistants, agents, RAG infrastructure
• Month 3 — SaaS and open data API directories
• Month 6 — Full Source Tool: answer four questions, get data-ranked results

Submit a listing or data correction via the submit form.