Aion 3.5 is a multi-model roleplaying and storytelling system from AionLabs, built on the GLM family of models. It uses a collaborative generation process in which multiple specialized models each...
Model details →AionLabs: Aion 3.5 vs OpenAI: GPT-5 Codex
OpenAI: GPT-5 Codex wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
GPT-5-Codex is a specialized version of GPT-5 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks. The model supports…
Model details →Side-by-side comparison
| Capability | AionLabs: Aion 3.5 | OpenAI: GPT-5 Codex | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 262K | 400K | 🏆 OpenAI: GPT-5 Codex |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $3.00 | $1.25 | 🏆 OpenAI: GPT-5 Codex |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $6.00 | $10.00 | 🏆 AionLabs: Aion 3.5 |
| 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 Codex |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is AionLabs: Aion 3.5 better than OpenAI: GPT-5 Codex?
OpenAI: GPT-5 Codex wins on 3 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between AionLabs: Aion 3.5 and OpenAI: GPT-5 Codex?
Input: $3.00 vs $1.25 per 1M tokens. Output: $6.00 vs $10.00 per 1M tokens.
What context windows do AionLabs: Aion 3.5 and OpenAI: GPT-5 Codex support?
AionLabs: Aion 3.5 supports up to 262K tokens. OpenAI: GPT-5 Codex supports up to 400K tokens.
Do both AionLabs: Aion 3.5 and OpenAI: GPT-5 Codex support tool calling?
AionLabs: Aion 3.5: yes. OpenAI: GPT-5 Codex: yes.