Synth Workshop · v0.9.3
Increase your Experiments Per Minute
Workshop combines fast iteration, interactive data visualization, and durable research infrastructure in one local and API-native workbench. Run evals, debug environments, optimize with GEPA, fine-tune models, and move directly from evidence to the next idea.
Build → run → inspect → improve → run again
North-star metric
Experiments Per Minute
Access
Local and API, as peers
Platform
macOS 14+ · Apple silicon
Product pillars
Four reasons the loop stays fast.
Speed
Compress the distance between an idea and trustworthy evidence. Setup, execution, inspection, and the next run belong in one loop.
Visualize data
Runs, traces, scores, candidates, and artifacts become interactive while the work is happening—and stay useful afterward.
Core data and algorithm infrastructure
Environments, datasets, evals, GEPA, SFT, traces, and provenance share nouns and contracts so new workflows compose instead of restarting from scratch.
Local first-class, API first-class
Local models, local data, and local execution are peers to ChatGPT login, direct provider APIs, and Synth account-backed services.
Need to exercise interactive software directly? Use CUA as part of the environment QA loop. It supports the research workflow without replacing it.
Two ways in
Start locally, or with Synth Cloud.
No Synth account
Use Workshop locally
Download the macOS app and begin without an account. Local models, local data, and local execution are enough to start a research loop.
Download the macOS appOptional account-backed access
Use Workshop with Synth Cloud
Create an account, receive included usage, connect the app, and unlock account-backed eval, optimization, SFT, and cloud-model work.
Create a Workshop accountResearch loop
Evals, environments, GEPA, and SFT in one workbench.
Evals
Run and compare evaluations with evidence you can inspect, not a score you have to trust blindly.
Environment QA
Build, exercise, and debug environments until their behavior is stable enough to optimize against.
GEPA and optimizers
Improve systems with evaluation-driven search. Workshop consumes Optimizers as an independent service, not a hidden internal.
Supervised fine-tuning
Train, checkpoint, and evaluate with the same evidence loop as evals and GEPA.
Providers
Use the access path you already have.
ChatGPT login
Use the ChatGPT account you already work with. Workshop does not require you to abandon that path.
Local models
Run on-device models without an account. Local inference stays on your Mac.
Direct provider APIs
Bring your own credentials. Provider keys remain in the native app's custody.
Synth API
Account-backed Synth services add managed capability, shared usage, and cloud scale without changing the research loop.
Open source
Workshop is open source and consumes independent infrastructure.
Workshop is Apache-2.0 licensed and includes agent-neutral bootstrap, doctor, and build scripts. Containers and Optimizers remain standalone open-source projects whose contracts Workshop consumes.
Onboarding
Reach a first successful eval, environment QA, GEPA, or SFT loop.
Billing and usage
What stays free and local, what the account enables, and how paid work is governed.
Release log
Every published Workshop line, with checksums and provenance.
Troubleshooting
Install, launch, upgrade, providers, and support for the macOS app.
Current published download line: Synth Workshop 0.9.3 (artifact available). v0.9.3 checksum: 6073029fde9ba4c470d5956bf4b6c5d8b26eaa5d81fbf65485899f34b18fe7cd.