Rnj-1 Instruct
Open 8B Essential AI model for code, STEM reasoning, and agentic tool use.
- Capability
- —No ECI score yet
- Input
- $0.15per 1M tokens
- Output
- $0.15per 1M tokens
- Context
- 33K33K max output
What it costs
- Input
- $0.15per million tokens
- Output
- $0.15per million tokens
- Blended (3:1)
- $0.15cheaper than 82% of priced models
Typical monthly bills
| Monthly usage | Estimated cost |
|---|---|
| Side project2M input + 0.5M output tokens | $0.375 |
| Team assistant25M input + 5M output tokens | $4.50 |
| Production app250M input + 50M output tokens | $45.00 |
Median of 1 paid API provider on models.dev.
Independent benchmarks
Epoch AI has not published a Capabilities Index score for Rnj-1 Instruct yet.
The details
- Lab
- Essential AI
- Released
- Dec 4, 2025
- Context window
- 32,768 tokens
- Max output
- 32,768 tokens
- Inputs
- Text
- Output
- Text
- Reasoning
- No
- Tool calling
- Yes
- Structured output
- No
- Weights
- Open weights · Apache 2.0
- Availability
- 1 API providerlisted on models.dev
About Rnj-1 Instruct
How much does Rnj-1 Instruct cost?
Rnj-1 Instruct costs $0.15 input / $0.15 output per million tokens (median across 1 API provider). At a 3:1 input-to-output mix that is $0.15 per million tokens, cheaper than 82% of the 445 priced models we track.
What is the context window of Rnj-1 Instruct?
Rnj-1 Instruct accepts up to 32,768 tokens per request and can write up to 32,768 tokens in one response.
How good is Rnj-1 Instruct?
Epoch AI has not published a Capabilities Index score for Rnj-1 Instruct yet.
Is Rnj-1 Instruct open source?
Yes. Essential AI publishes the weights under the Apache 2.0 licence, so it can be downloaded and self-hosted.
What inputs does Rnj-1 Instruct support?
Rnj-1 Instruct accepts text and replies in text. It is not a dedicated reasoning model, supports tool calling.
When was Rnj-1 Instruct released?
Essential AI released Rnj-1 Instruct on Dec 4, 2025.
What are the best alternatives to Rnj-1 Instruct?
The closest current models from other labs on capability, price and release date are Ministral 3 8B (Mistral AI, $0.15 / $0.15), MiMo-V2-Flash (Xiaomi, $0.10 / $0.30), GLM-4.7-FlashX (Z.ai (Zhipu), $0.07 / $0.40) and Step 3.5 Flash (StepFun, $0.10 / $0.30).