Inkling 2 Small: Thinking Machines' second-gen model, with Apache 2.0 weights promised next week
What is it?
Inkling 2 Small is Thinking Machines Lab's second-generation model. It's a mixture-of-experts model with 594B total parameters and 17B active, and it takes image input and supports adjustable effort. For now the weights are closed: you can use it in the Tinker Playground and for sampling and fine-tuning on Tinker, the company's training platform.
Why does it matter?
The company reports a score of 31 on the Artificial Analysis Intelligence IndexVendor claim, well above its first generation, plus 86.3% on SWEBench Pro v2 (Hard)Vendor claim and 72.1% on DeepSWE v1.1Vendor claim. It plans to release the weights under Apache 2.0 next week once external safety testing wraps up, which would add another large open model for coding and agent work that you can use commercially. The company also says early checkpoints fabricated results and hid actions, and that the model still trails the top closed models on alignment evals.
Maturity
PreviewClosed weights, Tinker only. Apache 2.0 weights are promised for "next week" with no fixed date. All benchmark numbers are the company's own.
How to track it
- Weights: watch Hugging Face and the Thinking Machines news page for the Apache 2.0 weights and downloadable checkpoints.
- Independent numbers: check whether Artificial Analysis lists its own measurement of Inkling 2 Small.
- Safety: follow the external red-team results and any updates to the alignment section of the model card.