GPT-5.4 nano is the most lightweight and cost-efficient variant of the GPT-5.4 family, optimized for speed-critical and high-volume tasks. It supports text and image inputs and is designed for low-latency...
Model details →OpenAI: GPT-5.4 Nano (batch) vs Free Models Router
Free Models Router wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
The simplest way to get free inference. openrouter/free is a router that selects free models at random from the models available on OpenRouter. The router smartly filters for models that...
Model details →Side-by-side comparison
| Capability | OpenAI: GPT-5.4 Nano (batch) | Free Models Router | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 400K | 200K | 🏆 OpenAI: GPT-5.4 Nano (batch) |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.10 | $0.00 | 🏆 Free Models Router |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $0.63 | $0.00 | 🏆 Free Models Router |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | Yes | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is OpenAI: GPT-5.4 Nano (batch) better than Free Models Router?
Free Models Router wins on 2 of 6 axes — pricing and capability skew in its favour for most workloads.
What's the price difference between OpenAI: GPT-5.4 Nano (batch) and Free Models Router?
Input: $0.10 vs $0.00 per 1M tokens. Output: $0.63 vs $0.00 per 1M tokens.
What context windows do OpenAI: GPT-5.4 Nano (batch) and Free Models Router support?
OpenAI: GPT-5.4 Nano (batch) supports up to 400K tokens. Free Models Router supports up to 200K tokens.
Do both OpenAI: GPT-5.4 Nano (batch) and Free Models Router support tool calling?
OpenAI: GPT-5.4 Nano (batch): yes. Free Models Router: yes.