Thinking Machines: Inkling 2 Small (free)
Thinking Machines: Inkling 2 Small (free) is a reasoning-tuned model: optimised for chain-of-thought, mathematics, and step-by-step problem solving rather than chat throughput. Available via Thinking Machines. 1,048,576-token context. Free tier on OpenRouter. Routed through OpenRouter's free tier, where capacity is best-effort.
Thinking Machines: Inkling 2 Small (free) is a multimodal AI model from Thinking Machines. It costs $0.00 per million input tokens and $0.00 per million output tokens (blended $0.00/M), with a 1,048,576-token context window.
RatesUSD per million tokens. Blend is 70% input, 30% output, our calculation.
From OpenRouter's listing, read on 11 Nov 2026.
- Step-by-step reasoning traces
- Mathematics and proofs
- Code synthesis with planning
- Robust on multi-step problems
- Multimodal: handles images alongside text
- Math problem solving
- Hard coding tasks
- Research-grade Q&A
- Multi-step planning
Benchmarks
More from Thinking Machines
See all 3 →Frequently asked questions
How much does Thinking Machines: Inkling 2 Small (free) cost?
Thinking Machines: Inkling 2 Small (free) costs $0.00 per million input tokens and $0.00 per million output tokens, for a blended reference rate of $0.00 per million tokens.
What is Thinking Machines: Inkling 2 Small (free)'s context window?
Thinking Machines: Inkling 2 Small (free) supports up to 1,048,576 tokens of context in a single request.
What is Thinking Machines: Inkling 2 Small (free) best for?
Thinking Machines: Inkling 2 Small (free) is well suited to Step-by-step reasoning traces, Mathematics and proofs and Code synthesis with planning.
Who makes Thinking Machines: Inkling 2 Small (free)?
Thinking Machines: Inkling 2 Small (free) is developed and served by Thinking Machines.