Aion-RP 1.0 (8B)
Summary
Aion-RP 1.0 (8B) is a language model from Aion Labs, released on 4 Feb 2025. It accepts text and generates text, with a 33K-token context window and up to 29K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $0.80 per million input tokens and $1.60 per million output tokens (OpenRouter), across 1 provider we track.
Aion-RP-Llama-3.1-8B ranks the highest in the character evaluation portion of the RPBench-Auto benchmark, a roleplaying-specific variant of Arena-Hard-Auto, where LLMs evaluate each other’s responses. It is a fine-tuned base model...
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | Aion Labs |
|---|---|
| Release date | 4 Feb 2025 [OpenRouter] |
| Status | Generally available |
| Context window | 33K (32,768 tokens) [OpenRouter] |
| Max output | 29K tokens [OpenRouter] |
| Knowledge cutoff | 31 Dec 2023 [OpenRouter] |
| Input | Text [OpenRouter] |
| Output | Text [OpenRouter] |
| Reasoning mode | No [OpenRouter] |
| Tool calling | No [OpenRouter] |
| Structured output | No [OpenRouter] |
Aion-RP 1.0 (8B) API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| OpenRouter aion-labs/aion-rp-llama-3.1-8b | $0.80 | $1.60 | – | 33K | OpenRouter, 4 Oct 2026 |
Frequently asked questions
What is the context window of Aion-RP 1.0 (8B)?
Aion-RP 1.0 (8B) has a context window of 32,768 tokens (33K) and can generate up to 29,491 tokens in a single response, according to OpenRouter.
How much does the Aion-RP 1.0 (8B) API cost?
Aion-RP 1.0 (8B) is listed from $0.80 per million input tokens and $1.60 per million output tokens (OpenRouter). Prices last verified 4 Oct 2026.
When was Aion-RP 1.0 (8B) released?
Aion Labs released Aion-RP 1.0 (8B) on 4 Feb 2025, according to OpenRouter.
Change history
No changes detected since we started tracking this model. We re-check every source daily.