Aion-2.0 is a variant of DeepSeek V3.2 optimized for immersive roleplaying and storytelling. It is particularly strong at introducing tension, crises, and conflict into stories, making narratives feel more engaging....
Model details →AionLabs: Aion-2.0 vs OpenAI: GPT-5.1 (batch)
OpenAI: GPT-5.1 (batch) wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-5. It uses adaptive reasoning...
Model details →Side-by-side comparison
| Capability | AionLabs: Aion-2.0 | OpenAI: GPT-5.1 (batch) | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 131K | 400K | 🏆 OpenAI: GPT-5.1 (batch) |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.80 | $0.63 | 🏆 OpenAI: GPT-5.1 (batch) |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $1.60 | $5.00 | 🏆 AionLabs: Aion-2.0 |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | — | Yes | 🏆 OpenAI: GPT-5.1 (batch) |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is AionLabs: Aion-2.0 better than OpenAI: GPT-5.1 (batch)?
OpenAI: GPT-5.1 (batch) wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between AionLabs: Aion-2.0 and OpenAI: GPT-5.1 (batch)?
Input: $0.80 vs $0.63 per 1M tokens. Output: $1.60 vs $5.00 per 1M tokens.
What context windows do AionLabs: Aion-2.0 and OpenAI: GPT-5.1 (batch) support?
AionLabs: Aion-2.0 supports up to 131K tokens. OpenAI: GPT-5.1 (batch) supports up to 400K tokens.
Do both AionLabs: Aion-2.0 and OpenAI: GPT-5.1 (batch) support tool calling?
AionLabs: Aion-2.0: yes. OpenAI: GPT-5.1 (batch): yes.