PrismML: Ternary Bonsai 2 9B vs OpenAI: GPT-6.1 Sol Pro

For a sample job of 1 million input tokens and 250,000 output tokens, Ternary Bonsai 2 9B costs $0.11 and GPT-6.1 Sol Pro costs $4.50, so Ternary Bonsai 2 9B is about 40.0 times cheaper for the same work.

GPT-6.1 Sol Pro reads up to 1,050,000 tokens at once, roughly 1,575 pages of text, against about 393 pages for Ternary Bonsai 2 9B.

Across the 18 tasks where they differ, Ternary Bonsai 2 9B scores higher on 5 (Code Completion, Regex Writing, JSON Extraction and others), GPT-6.1 Sol Pro on 13 (SQL Generation, Code Review, Code Refactoring and others).

Ternary Bonsai 2 9B was released in October 2026 and GPT-6.1 Sol Pro in September 2026.

Pick Ternary Bonsai 2 9B if you need lower cost; pick GPT-6.1 Sol Pro if you need long documents or the stronger all-round task scores.

Costs use current list prices per million tokens; page counts assume about 0.75 words per token and 500 words per page.