Weights & BiasesMellum2 12B A2.5B model ID, context window & pricing
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Quick facts
Model ID JetBrains/Mellum2-12B-A2.5B-Instruct
Source Weights & Biases
Context Window 131072
Pricing $0.05 input / $0.10 output per 1M tokens
Capabilities tool calling, structured output, temperature control, open weights
Model overview
Mellum2 12B A2.5B is an AI model from Weights & Biases with 131072 token context window and text input support.
Published pricing is $0.05 input and $0.10 output per 1M tokens.
- Workloads that use text inputs with text outputs.
- Agent and tool workflows that need function calling.
Model ID JetBrains/Mellum2-12B-A2.5B-Instruct
Provider Weights & Biases
Family -
Status -
Knowledge Cutoff -
Release Date 2026-06-01
Input Modalities text
Output Modalities text
Context Window 131072
Input Limit -
Output Limit 131072
Tool Calling Yes
Reasoning No
Structured Output Yes
Temperature Control Yes
Open Weights Yes
Input Cost / 1M tokens $0.05
Output Cost / 1M tokens $0.10
Reasoning Cost / 1M tokens -
Cache Read Cost / 1M tokens $0.05
Cache Write Cost / 1M tokens -