Bolt Forge launches open-model lab, trains 1T-parameter open model on opt-in user builds
weswinder · x · 2026-09-15
Bolt.new launched Bolt Forge, an open-model-lab agent built with Arcee AI that trains new trillion-parameter-class open-weight models on anonymized, opt-in user build sessions.
Key points:
- Forge runs open models only: GLM 5.3 Flash and GLM 5.3, with Kimi K3 and DeepSeek v4 Pro as experimental options.
- Forge's open models score 92.2 on the Bolt Build Index vs 101.0 for the top paid model (91%), in exchange for up to 50X more usage free on every individual Pro plan through October 14, 2026.
- Training is strictly opt-in; sessions are anonymized with secrets stripped, and Standard/Max agents never train on user data.
- Commenters see Bolt's training-data scale as enough to compete with big labs, making the upcoming 1T open model significant for US open-weight AI.
Related event: Bolt Launches Forge: Free GLM/DeepSeek/Kimi Access with 50x Usage(6 posts)→
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