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 rather than an instruct model, designed to produce more natural and varied writing.
Modalities
In / Out Price
$0.80 / $1.60per 1M
Context
33K
Released
Feb 4, 2025
Knowledge Cutoff
Dec 2023
This model is hosted by one provider. OpenRouter forwards every request to it directly — no routing decisions to make.
The average price customers actually pay for this model, next to the prices providers post. Caching and discounts mean the price actually paid is often well below the listed one.
Throughput is how fast the model writes (tokens per second — higher is better). Latency is total round-trip time (lower is better). TTFT is time-to-first-token — how long before you see anything appear (lower is better).
Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.
Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.
Token volume and request traffic to this model over time.
Drop-in code to call this model. OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. The only thing that changes between models is the model slug below.
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 rather than an instruct model, designed to produce more natural and varied writing.
Aion-RP 1.0 (8B) costs $0.80/M input tokens and $1.60/M output tokens.
Aion-RP 1.0 (8B) has a 32,768 token context window. It supports up to 32,768 completion tokens.
The Aion-RP 1.0 (8B) endpoint shown on this page does not accept tools, so function calling is unavailable there. It does not support response_format, so JSON output is not enforced.
Aion-3.0-Mini, Aion-3.0 and Aion-2.0 are other text models from Aion Labs.
Aion-RP 1.0 (8B) was released on February 4, 2025. Its knowledge cutoff is December 31, 2023.
| $0.80 | $1.60 | 1.01s | 31 tps |
Throughput
31tok/s
P50, best across providers
Latency
1.01s
P50, best provider
100.00%
99.38%
When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and customization options.