Model comparison - Same provider, successor
GPT-5.4 nano vs GPT-5 nano
GPT-5.4 nano and GPT-5 nano are both OpenAI models. On list price, GPT-5.4 nano charges 4x GPT-5 nano's input price ($0.20 vs $0.05 per 1M tokens), and GPT-5.4 nano charges 3.1x GPT-5 nano's output price ($1.25 vs $0.40 per 1M tokens). GPT-5.4 nano and GPT-5 nano both have a 400,000-token context window, and both return up to 128,000 output tokens per response. GPT-5.4 nano was released on March 17, 2026 and GPT-5 nano on August 7, 2025. Both are closed-weights models, available only through an API.
Last verified from each provider's pricing page. All sources
Side-by-side specs
| Spec | GPT-5.4 nano | GPT-5 nano |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Input / 1M tokens | $0.20 | $0.05 |
| Output / 1M tokens | $1.25 | $0.40 |
| Cache read / 1M | $0.02 | $0.005 |
| Batch input / 1M | $0.10 | $0.025 |
| Batch output / 1M | $0.625 | $0.20 |
| Context window | 400,000 | 400,000 |
| Max output | 128,000 | 128,000 |
| Release date | ||
| Weights | Closed | Closed |
| API model id | gpt-5.4-nano | gpt-5-nano |
| AI Gateway id | openai/gpt-5.4-nano | openai/gpt-5-nano |
| Last verified |
Prices in USD per 1M tokens at each provider's standard first-party rate. A dash means the provider does not bill that item separately or no primary page states it.
What each costs in practice
The same three workloads every model page uses, worked from each model's standard list rates. Swap in your own token counts with the math on each model's page.
| Workload | GPT-5.4 nano | GPT-5 nano |
|---|---|---|
| One agent session1M input tokens and 100K output tokens, no caching. | $0.325 | $0.09 |
| A chat app10,000 requests a day at 2K input and 500 output tokens each. | $10.25$307.50 per 30-day month | $3.00$90.00 per 30-day month |
| The same session at a 90% cache hit90% of the input is read from the prompt cache. The one-time cache write premium is not included. | $0.163 | $0.0495 |
Show the math
GPT-5.4 nano
- One agent sessionInput: 1M x $0.20 = $0.20Output: 0.1M x $1.25 = $0.125
- A chat appInput: 20M x $0.20 = $4.00Output: 5M x $1.25 = $6.25
- The same session at a 90% cache hitCached input: 0.9M x $0.02 = $0.018Uncached input: 0.1M x $0.20 = $0.02Output: 0.1M x $1.25 = $0.125
GPT-5 nano
- One agent sessionInput: 1M x $0.05 = $0.05Output: 0.1M x $0.40 = $0.04
- A chat appInput: 20M x $0.05 = $1.00Output: 5M x $0.40 = $2.00
- The same session at a 90% cache hitCached input: 0.9M x $0.005 = $0.0045Uncached input: 0.1M x $0.05 = $0.005Output: 0.1M x $0.40 = $0.04
Benchmarks under the same setting
No board in the benchmark directory lists both GPT-5.4 nano and GPT-5 nano under the same setting, so there is no like-for-like score to show here.
Model pages
FAQ
How do GPT-5.4 nano and GPT-5 nano compare on price?
On list price, GPT-5.4 nano charges 4x GPT-5 nano's input price ($0.20 vs $0.05 per 1M tokens), and GPT-5.4 nano charges 3.1x GPT-5 nano's output price ($1.25 vs $0.40 per 1M tokens). For one agent session of 1M input and 100K output tokens with no caching, that is $0.325 on GPT-5.4 nano and $0.09 on GPT-5 nano. Prices are each provider's first-party list rates, verified October 17, 2026 and October 17, 2026.
What are the context windows of GPT-5.4 nano and GPT-5 nano?
GPT-5.4 nano and GPT-5 nano both have a 400,000-token context window, and both return up to 128,000 output tokens per response.
Are GPT-5.4 nano and GPT-5 nano open weights?
GPT-5.4 nano is closed-weights and is called through OpenAI's API as gpt-5.4-nano. GPT-5 nano is closed-weights and is called through OpenAI's API as gpt-5-nano.
Sources
GPT-5.4 nano verified from developers.openai.com; GPT-5 nano verified from developers.openai.com. This page is as current as the older of the two: .
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