GPT-4.1 Nano vs GPT-5.5 Pro
A side-by-side comparison of two multimodal models — real specs, pricing, strengths and weaknesses, and a clear verdict on which to choose. Kept current by our agents.
Quick verdict: which should you choose?
Choose GPT-4.1 Nano if you need
- ✓Choose GPT-5.5 Pro if you need strong reasoning over extended inputs with seamless multimodal integration.
- ✓Choose GPT-5.5 Pro if you need maximum context handling at 1,050,000 tokens for complex file and image tasks.
- ✓Choose GPT-5.5 Pro if you need native support across files, images, and text without efficiency trade-offs.
Choose GPT-5.5 Pro if you need
- ✓Choose GPT-4.1 Nano if you need high output speed at 130.26 t/s on massive multimodal inputs.
- ✓Choose GPT-4.1 Nano if you need extremely low pricing at $0.4 per million tokens.
- ✓Choose GPT-4.1 Nano if you need efficient processing of 1M+ token contexts with images, text, and files.
Verdict
GPT-5.5 Pro leads for users prioritizing strong reasoning over extended multimodal inputs and seamless integration, while GPT-4.1 Nano dominates on speed and cost for large-scale context processing. Both offer nearly identical context windows above 1M tokens with native image, text, and file support from OpenAI. GPT-5.5 Pro's advantages come at dramatically higher price and unknown speed, whereas GPT-4.1 Nano trades potential depth for measurable efficiency.
GPT-4.1 Nano vs GPT-5.5 Pro: side by side
| Spec | GPT-4.1 Nano | GPT-5.5 Pro | Winner |
|---|---|---|---|
| Intelligence | 7.3 | — | Tie |
| Output speed | 129 t/s | — | Tie |
| Output price | $0.40/1M | $180.00/1M | GPT-4.1 Nano |
| Context | 1048K | 1050K | GPT-5.5 Pro |
| Params | — | — | Tie |
| Provider | OpenAI | OpenAI | Tie |
Detailed analysis
Pricing
Winner: GPT-4.1 NanoGPT-4.1 Nano costs $0.4 per million tokens compared to GPT-5.5 Pro at $180 per million tokens. This makes B over 400 times cheaper for equivalent output volume. No other cost data is provided for either model.
Speed
Winner: GPT-4.1 NanoGPT-4.1 Nano reports output speed of 130.26 tokens per second. GPT-5.5 Pro has no speed metric listed but notes potential latency on very long inputs. B therefore shows clear measured efficiency.
Context Window & Multimodal
Winner: TieBoth models provide context above 1M tokens with native support for images, text, and files. GPT-5.5 Pro lists 1,050,000 tokens and emphasizes seamless integration plus strong reasoning, while GPT-4.1 Nano lists 1,047,576 tokens. Neither supports audio or video.
Reasoning Depth
Winner: GPT-5.5 ProGPT-5.5 Pro highlights strong reasoning over extended inputs as a core strength. GPT-4.1 Nano notes that its nano size may reduce depth on complex tasks. Intelligence index is available only for B at 7.3.
GPT-4.1 Nano
Pros
- +Extremely large context window
- +Native support for images, text, and files
- +OpenAI multimodal architecture
Cons
- –Nano size may reduce depth on complex tasks
- –Performance trade-offs for efficiency
GPT-5.5 Pro
Pros
- +Very large context window
- +Native support for files, images, and text
- +Seamless multimodal integration
Cons
- –High resource use with maximum context
- –No audio or video modalities
- –Potential latency on very long inputs
Summary: GPT-4.1 Nano vs GPT-5.5 Pro
Select GPT-5.5 Pro when maximum reasoning quality and integration matter most despite high cost. Select GPT-4.1 Nano when speed, affordability, and efficient large-context handling are priorities. The choice hinges on whether depth or efficiency drives the workload.
Frequently asked questions
GPT-5.5 Pro is stronger for reasoning depth and integration; GPT-4.1 Nano is better for speed and cost on similar context sizes.