Aion-1.0 is a multi-model system designed for high performance across various tasks, including reasoning and coding. It is built on DeepSeek-R1, augmented with additional models and techniques such as Tree of Thoughts (ToT) and Mixture of E…
Model details →AionLabs: Aion-1.0 vs xAI: Grok 4 Fast
xAI: Grok 4 Fast wins on 5 of 6 axes — pricing and capability skew in its favour for most workloads.
Grok 4 Fast is xAI's latest multimodal model with SOTA cost-efficiency and a 2M token context window. It comes in two flavors: non-reasoning and reasoning. Read more about the model on xAI's [news post](http://x.ai/news/grok-4-fast). Reaso…
Model details →Side-by-side comparison
| Capability | AionLabs: Aion-1.0 | xAI: Grok 4 Fast | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 131K | 2M | 🏆 xAI: Grok 4 Fast |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $4.00 | $0.20 | 🏆 xAI: Grok 4 Fast |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $8.00 | $0.50 | 🏆 xAI: Grok 4 Fast |
| Tool / function calling First-class support for emitting structured tool calls. | — | Yes | 🏆 xAI: Grok 4 Fast |
| Vision input Accepts image inputs alongside text. | — | Yes | 🏆 xAI: Grok 4 Fast |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is AionLabs: Aion-1.0 better than xAI: Grok 4 Fast?
xAI: Grok 4 Fast wins on 5 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between AionLabs: Aion-1.0 and xAI: Grok 4 Fast?
Input: $4.00 vs $0.20 per 1M tokens. Output: $8.00 vs $0.50 per 1M tokens.
What context windows do AionLabs: Aion-1.0 and xAI: Grok 4 Fast support?
AionLabs: Aion-1.0 supports up to 131K tokens. xAI: Grok 4 Fast supports up to 2M tokens.
Do both AionLabs: Aion-1.0 and xAI: Grok 4 Fast support tool calling?
AionLabs: Aion-1.0: not advertised. xAI: Grok 4 Fast: yes.
Compare AionLabs: Aion-1.0 with other models
vs AI21: Jamba Large 1.7vs AionLabs: Aion-1.0-Minivs AionLabs: Aion-2.0vs AionLabs: Aion-RP 1.0 (8B)