Inkling - Thinking Machines Lab
Open weights, ready to tinker
An efficient open model for text, images, and audio, available to fine-tune.
Model at a glance
- 975B total, 41B active
- Parameters
- Mixture of Experts
- Architecture
- 1M tokens
- Context window
- 64K / 256K on Tinker
- Text, Image, Audio
- Input modalities
A well-rounded, generalist model
Spider chart comparing Inkling, Nemotron 3 Ultra, GLM 5.2, GPT 5.6 Sol, and Claude Fable 5 on ten evaluations scored from zero to one hundred. Inkling is shown with the heavier cobalt line. Evaluations without a reported model score are plotted at zero. Hover an evaluation to compare every model's score.
| Model | HLE (no tools) | Reasoning | AIME 2026 | Reasoning | SWE-bench Pro (Public) | Agentic (coding) | Terminal Bench 2.1 | Agentic (coding) | MCP Atlas | Agentic (general) | SimpleQA Verified | Factuality | AA Omniscience (acc) | Factuality | Audio | MCAudio | MMMU Pro | Vision | IFBench | Chat |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Inkling | 40 | 60 | 80 | 100 | 60 | 70 | 80 | 90 | 70 | 75 | 85 | 65 | 80 | 75 | 70 | 80 | 85 | 70 | 75 | 80 |
| Nemotron 3 Ultra | 30 | 50 | 60 | 90 | 50 | 60 | 70 | 80 | 50 | 65 | 75 | 55 | 75 | 70 | 65 | 75 | 80 | 60 | 70 | 70 |
| GLM 5.2 | 30 | 40 | 50 | 70 | 40 | 40 | 50 | 60 | 40 | 50 | 60 | 50 | 65 | 60 | 50 | 65 | 70 | 50 | 60 | 65 |
| GPT 5.6 Sol | 20 | 30 | 40 | 60 | 30 | 30 | 40 | 50 | 30 | 40 | 50 | 40 | 55 | 50 | 40 | 55 | 60 | 40 | 50 | 50 |
| Claude Fable 5 | 10 | 20 | 30 | 50 | 20 | 20 | 30 | 40 | 20 | 30 | 40 | 30 | 45 | 40 | 30 | 45 | 50 | 30 | 40 | 40 |
Key Features
- General intelligence: Performs well across knowledge, math, and science.
- Agentic coding & tools: Writes code and uses tools to get work done.
- Audio & image input: Natively multimodal on input, and at the open-source frontier for speech.
- Controllable effort: Adjust thinking time to balance speed and performance.
- Forecasting & confidence: Makes predictions with well-calibrated confidence.
- Instruction following: Handles detailed, multi-step instructions reliably.
Ready to customize
Fine-tune Inkling for your domain on Tinker, our training platform.