PrismML: Ternary Bonsai 2 27B

Image input Text input Text output
Author's Description

Bonsai 2 27B is a 27B-parameter reasoning model from PrismML derived from Qwen3.8-27B. It supports coding, mathematics, tool calling, and image understanding with a 262K-token context window. Ternary compression shrinks...

Key Specifications
Cost
$$$
Context
262K
Parameters
27B
Released
Sep 18, 2026
Speed
Ability
Reliability
Supported Parameters

This model supports the following parameters:

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

This model supports the following features:

Tools Response Format Structured Outputs Reasoning
Performance Summary

PrismML: Ternary Bonsai 2 27B, a 27B-parameter reasoning model derived from Qwen3.8-27B, demonstrates exceptional reliability with a 100% success rate across all benchmarks, consistently providing usable responses. It performs among the fastest models and offers highly competitive pricing, ranking in the Infinityth percentile for both speed and cost across five benchmarks. While excelling in General Knowledge (98.5% accuracy), Email Classification (99.0% accuracy), Reasoning (96.0% accuracy), and Ethics (99.0% accuracy), the model exhibits a critical weakness in Instruction Following, achieving 0.0% accuracy. This suggests a significant limitation in processing and executing complex, multi-layered instructions despite its strong performance in other cognitive areas. Its high accuracy in classification, reasoning, and ethical scenarios, coupled with its impressive speed and cost-efficiency, positions it as a strong contender for tasks not heavily reliant on intricate instruction adherence. The model's long context window of 262K tokens further enhances its utility for extensive data processing.

Model Pricing

Current Pricing

Feature Price (per 1M tokens)
Prompt $0.075
Completion $0.5

Price History

Available Endpoints
Provider Endpoint Name Context Length Pricing (Input) Pricing (Output)
Darkbloom
Darkbloom | prism-ml/ternary-bonsai-2-27b-20260918 262K $0.075 / 1M tokens $0.5 / 1M tokens
Benchmark Results
Benchmark Category Reasoning Strategy Free Executions Accuracy Cost Duration