PrismML: Ternary Bonsai 2 9B

Image input Text input Text output
Author's Description

Ternary Bonsai 2 9B is PrismML’s compact, open-weight language model for conversational AI, reasoning, and tool use. Built on Qwen3.5, it uses ternary weights packed into 2 bits for efficient...

Key Specifications
Cost
$$$
Context
262K
Parameters
9B
Released
Oct 15, 2026
Speed
★
Ability
★★★★
Reliability
★★★★★
Supported Parameters

This model supports the following parameters:

Top P Seed Include Reasoning Tools Temperature Response Format Structured Outputs Frequency Penalty Tool Choice Stop Reasoning Top Logprobs Max Tokens Presence Penalty Logprobs
Features

This model supports the following features:

Tools Response Format Structured Outputs Reasoning
Performance Summary

PrismML's Ternary Bonsai 2 9B demonstrates notable analytical capability paired with flawless operational consistency. Evaluated on multi-step reasoning benchmarks covering logic puzzles, pattern recognition, and mathematical deduction, the model achieved an impressive 94.0% accuracy, placing it in the 69th percentile. This strong baseline reasoning is further bolstered by an extensive 262,144-token context window, making it well-suited for long-context comprehension and tool-use workflows. In terms of cost, the model offers competitive pricing, ranking in the 58th percentile for overall cost efficiency. Another standout feature is its technical dependability; Ternary Bonsai 2 9B demonstrated exceptional reliability with a perfect 100% success rate and zero technical failures during testing. The model's most notable weakness is its execution speed. It tends to have longer response times, ranking in the 10th percentile among evaluated models. Consequently, while Ternary Bonsai 2 9B may not be suited for latency-critical, real-time interactions, its high reasoning precision, rock-solid dependability, and cost-effective profile make it a compelling choice for asynchronous problem-solving, deep analysis, and background automation tasks.

Model Pricing

Current Pricing

Feature Price (per 1M tokens)
Prompt $0.08
Completion $0.13
Input Cache Read $0.04

Price History

Available Endpoints
Provider Endpoint Name Context Length Pricing (Input) Pricing (Output)
Darkbloom
Darkbloom | prism-ml/ternary-bonsai-2-9b-20261015 262K $0.08 / 1M tokens $0.13 / 1M tokens
Benchmark Results
Benchmark Category Reasoning Strategy Free Executions Accuracy Cost Duration
Other Models by prism-ml