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-5.6 Sol Pro
AionLabs: Aion-2.0 and OpenAI: GPT-5.6 Sol Pro are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
GPT-5.6 Sol Pro is the same underlying model as [GPT-5.6 Sol](https://openrouter.ai/openai/gpt-5.6-sol), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. Learn more in OpenAI's docs: https://develope…
Model details →Side-by-side comparison
| Capability | AionLabs: Aion-2.0 | OpenAI: GPT-5.6 Sol Pro | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 131K | 1.1M | 🏆 OpenAI: GPT-5.6 Sol Pro |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.80 | $2.00 | 🏆 AionLabs: Aion-2.0 |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $1.60 | $10.00 | 🏆 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-5.6 Sol Pro |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is AionLabs: Aion-2.0 better than OpenAI: GPT-5.6 Sol Pro?
AionLabs: Aion-2.0 and OpenAI: GPT-5.6 Sol Pro are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
What's the price difference between AionLabs: Aion-2.0 and OpenAI: GPT-5.6 Sol Pro?
Input: $0.80 vs $2.00 per 1M tokens. Output: $1.60 vs $10.00 per 1M tokens.
What context windows do AionLabs: Aion-2.0 and OpenAI: GPT-5.6 Sol Pro support?
AionLabs: Aion-2.0 supports up to 131K tokens. OpenAI: GPT-5.6 Sol Pro supports up to 1.1M tokens.
Do both AionLabs: Aion-2.0 and OpenAI: GPT-5.6 Sol Pro support tool calling?
AionLabs: Aion-2.0: yes. OpenAI: GPT-5.6 Sol Pro: yes.