Optimize and serve models with Fable quality at half the cost
Hi HN, we built world-model-optimizer, an open source tool to continually improve a specialized model for an agent. It does this by simulating production tool responses through text world modeling (similar to QwenAgentWorld, summary here https://x.com/silennai/status/2073887455884058814). We can then use this to train a router for frontier, OS, and local models (use defaults or pick which ones to optimize against). wmo ingests agent traces, builds the simulation, embeds the traces, runs different models you choose against the simulation scenarios, and then uses a KNN…
Optimize and serve models with Fable quality at half the cost launched on July 26, 2026 with 71 votes, #547 of 24,623 launches that month and more than 95% of that year's launches.
In plain words
World-model-optimizer is an open source tool that improves specialized models for agents by simulating production tool responses through text world modeling. It ingests agent traces, builds simulations, and runs different models against scenarios to train a router that selects between frontier, open-source, and local models. The tool is cache-aware and uses confidence gating to avoid switching models unless evidence strongly supports it, helping teams optimize model performance while reducing costs.
written from the facts on this page · September 2026
From the sources
Experiential is the open source, zero markup gateway for BYOK, self-hosted and 1000+ marketplace models. It learns from your traffic to cut costs, recommend better models, and train a specialized model you own. - experientiallabs/experiential
Start a local OpenAI-compatible gateway. On first run, the setup wizard uses the shared provider, model, and reasoning-effort selectors, persists every selected provider connection, then shows defaults for the public alias, identity, and $50.00 command budget before printing a one-time key: export EXP_GATEWAY_KEY=... curl http://127.0.0.1:8000/v1/chat/completions \ -H " Authorization: Bearer $EXP_GATEWAY_KEY " \ -H ' Content-Type: application/json ' \ -d ' {"model":"opus-5","messages":[{"role":"user","content":"Help me"}]} ' Setup / get started with the hosted gateway Prefer a managed gateway to running one locally? The hosted platform at platform.experientiallabs.ai serves the same…from github.com
In the maker’s words, at launch
Hi HN, we built world-model-optimizer, an open source tool to continually improve a specialized model for an agent. It does this by simulating production tool responses through text world modeling (similar to QwenAgentWorld, summary here https://x.com/silennai/status/2073887455884058814). We…
Does a similar job
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Source: Show HN post ↗ · launch text quoted in part
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Over the past few months, our team has been building more and more slidedecks using web frontend technologies with coding harnesses like Claude Code, but a common complaint is to make even small edits we need to edit the code either manually or via the harness. To avoid this loop, I ended up creating Bento, a single HTML file with everything you need in a slide tool including animations and shared editing. There's no install or cloud login, everything works offline. The default deck is around 560 KB and it doesn't need to fetch anything once you got it. Open it in a browser and then you can…
Dev tools · Jul 2026 · bento.page
A few days ago I found myself trying out GLM 5.2 and was really positively impressed. The capabilities and security I was getting from this LLM are similar to those I've gotten from models like Claude or GPT, and this really surprised me. But then I thought, "I wonder how it would work on a normal computer like mine," and above all, "I wonder if it would work without going into OOM on a computer like mine." So I started working with the help of agents to test this possibility. I started converting the model to int4, understanding MTP usage, and if possible implementing DSA for long context.…
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