Migrating from imagen-4.0-fast-generate-001 to gemini-nano-banana-2.1
What changes when you move from imagen-4.0-fast-generate-001 to gemini-nano-banana-2.1: prices, limits, features and parameters, read from each company's own pages.
- Status
- Retired
- Shutdown
- Aug 17, 2026 at the earliest
- Time left
- —
- Status
- Active
- Shutdown
- none announced
- Time left
- —
Prices
USD per 1M tokens, standard tier| Type | imagen-4.0-fast-generate-001 | gemini-nano-banana-2.1 | Change |
|---|---|---|---|
| Input | Not published | $1.50first seen October 6, 2026 · source | — |
| Output | Not published | $7.50first seen October 7, 2026 · source | — |
Other tiers, prompt-size bands and modalities are on each model's page.
Limits
Tokens| Limit | imagen-4.0-fast-generate-001 | gemini-nano-banana-2.1 | Change |
|---|---|---|---|
| Context window | Not published | 131,072 tokensfirst seen October 6, 2026 · source | — |
| Max output tokens | Not published | 32,768 tokensfirst seen October 6, 2026 · source | — |
Features and parameters
Compare modelsNo feature is published for both models, so none can be compared.
Not published for imagen-4.0-fast-generate-001: Structured outputs, Function calling, Prompt caching, Batch API, Image input, PDF input, Reasoning / thinking, Fine-tuning, Built-in web search, temperature parameter, top_p parameter, logprobs, Context window, Max output tokens.
Not published for gemini-nano-banana-2.1: Fine-tuning, temperature parameter, top_p parameter, logprobs.
Aliases
All aliasesNo aliases point at either model.
On cloud platforms
All platform dates| Model | Platform | Platform ID | Shutdown | Time left |
|---|---|---|---|---|
| gemini-nano-banana-2.1 | Google Cloud Vertex AI | gemini-nano-banana-2.1 | none announcedActive |
Read daily from each platform's own pages. The status above uses each company's own date. Time left counts to 00:00 UTC on the shutdown date, which is the evening before in ET.
Checklist
- Change the model string from
imagen-4.0-fast-generate-001togemini-nano-banana-2.1.
Compared from AIWire's published data when this page loaded. Each fact links to the page it came from. Model pages: imagen-4.0-fast-generate-001, gemini-nano-banana-2.1.