PrismML

Ternary Bonsai 2 9B

prism-ml/ternary-bonsai-2-9b
Model weightsReleased Oct 16, 2026Open Weights
ThinkingToolsVisionopen weights

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...

Cost / 1M tokens

Very low usage

$0.08

input

$0.04

cached input

$0.13

output

Context Window

262K

Up to 66K max output

Modalities

text, image → text

Qwen tokenizer

Quickstart & API

prism-ml/ternary-bonsai-2-9b
Open the model picker in ChatOSS Desktop (Code, Kanban, or Chat) and select or paste this model ID.

Best for & Strengths

Key Strengths

Open weightsExtended reasoningTool & agent callingMultimodal vision

Recommended Workloads in ChatOSS

  • Coding agents
  • Complex reasoning & debugging
  • Screenshot-to-code workflows
Available in ChatOSS Code, Kanban Orchestrate, and Chat modes via Plus, Max, or BYOK.

Active Provider Endpoints (1)

Upstream inference providers serving Ternary Bonsai 2 9B, with per-provider pricing, context limits, quantization, and 24-hour uptime.

ProviderInput / 1MOutput / 1MCache Read / 1MContextMax OutputQuantizationUptime (24h)
Darkbloomcache
darkbloom/int4
$0.08$0.13$0.04262K66Kint4100.0%

Supported API Parameters

Parameters accepted by this model when called through ChatOSS or OpenRouter.

frequency_penaltyinclude_reasoninglogprobsmax_tokenspresence_penaltyreasoningrepetition_penaltyresponse_formatseedstopstructured_outputstemperaturetool_choicetoolstop_ktop_logprobstop_p

Compare Similar Models

Browse all models →

PrismML

Ternary Bonsai 2 27B

262K

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...

$0.075 / $0.50

Anthropic

Claude Opus 5.5

1M

Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...

$4.00 / $20.00Coding 74.1%

Moonshot AI

Kimi K3.1 Pro

1M

Kimi K3.1 Pro is Moonshot AI's flagship open-weight multimodal reasoning model and a post-trained successor to Kimi K3, with a 1M-token context window. It is built for long-horizon coding, 3D...

$2.00 / $10.00Coding 65%

Anthropic

Claude Opus 5

1M

Claude Opus 5 is Anthropic’s flagship model for demanding reasoning, coding, and long-horizon agentic work. It is particularly strong at end-to-end software tasks, code review and bug finding, visual analysis...

$5.00 / $25.00Coding 68.3%

Anthropic

Claude Fable 5.1

1M

Claude Fable 5.1 improves on Claude Fable 5 across the board, with the biggest gains in agentic coding, long-running agentic workflows, and knowledge work: long code refactors, front-end and visual...

$10.00 / $50.00Coding 67.6%

Z.ai (GLM)

GLM 5.3

1M

GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks. It supports text input and output with a 1M-token context window, and improves...

$0.07 / $1.40Coding 58.3%