Migrating from gemini-3.1-flash-image to gemini-nano-banana-2.1

What changes when you move from gemini-3.1-flash-image to gemini-nano-banana-2.1: input price +200%, output price +150%.

From: gemini-3.1-flash-image
Status: Active
Shutdown: none announced
Time left: —

To: gemini-nano-banana-2.1
Status: Active
Shutdown: none announced
Time left: —

Prices

USD per 1M tokens, standard tier

Type	gemini-3.1-flash-image	gemini-nano-banana-2.1	Change
Input	$0.50first seen October 1, 2026 · source	$1.50first seen October 6, 2026 · source	+200%
Output	$3.00first seen October 1, 2026 · source	$7.50first seen October 7, 2026 · source	+150%

At 1M input and 250K output tokens a month: $1.25 on gemini-3.1-flash-image, $3.375 on gemini-nano-banana-2.1 (+170%).

Other tiers, prompt-size bands and modalities are on each model's page.

Limits

Tokens

Limit	gemini-3.1-flash-image	gemini-nano-banana-2.1	Change
Context window	131,072 tokensin place when tracking began (October 6, 2026) · source	131,072 tokensfirst seen October 6, 2026 · source	0%
Max output tokens	32,768 tokensin place when tracking began (October 6, 2026) · source	32,768 tokensfirst seen October 6, 2026 · source	0%

Benchmarks

Same benchmark and source on both sides; settings named where they differ

Benchmark	gemini-3.1-flash-image	gemini-nano-banana-2.1	Change
Arena Text to ImageArena, no setting (vs web search). Ranges don't overlap.	1262 ±4	1328 ±9	+66
Arena Image EditArena, no setting (vs web search). Ranges don't overlap.	1387 ±3	1428 ±6	+41

A score from one source is never compared with another source's, and company-reported scores are compared only within the same company; settings named where they differ. Data: Arena (arena.ai), CC BY 4.0.

Features and parameters

Compare models

Same on both

Structured outputs: not supported on both.gemini-3.1-flash-image: in place when tracking began (October 6, 2026) · source · gemini-nano-banana-2.1: first seen October 6, 2026 · source
Function calling: not supported on both.gemini-3.1-flash-image: in place when tracking began (October 6, 2026) · source · gemini-nano-banana-2.1: first seen October 6, 2026 · source
Prompt caching: not supported on both.gemini-3.1-flash-image: in place when tracking began (October 6, 2026) · source · gemini-nano-banana-2.1: first seen October 6, 2026 · source
Batch API: supported on both.gemini-3.1-flash-image: in place when tracking began (October 6, 2026) · source · gemini-nano-banana-2.1: first seen October 6, 2026 · source
Image input: supported on both.gemini-3.1-flash-image: in place when tracking began (October 6, 2026) · source · gemini-nano-banana-2.1: first seen October 6, 2026 · source
PDF input: supported on both.gemini-3.1-flash-image: in place when tracking began (October 6, 2026) · source · gemini-nano-banana-2.1: first seen October 6, 2026 · source
Reasoning / thinking: supported on both.gemini-3.1-flash-image: in place when tracking began (October 6, 2026) · source · gemini-nano-banana-2.1: first seen October 6, 2026 · source
Built-in web search: supported on both.gemini-3.1-flash-image: in place when tracking began (October 6, 2026) · source · gemini-nano-banana-2.1: first seen October 6, 2026 · source

Not published for gemini-3.1-flash-image: Fine-tuning, temperature parameter, top_p parameter, logprobs.

Not published for gemini-nano-banana-2.1: Fine-tuning, temperature parameter, top_p parameter, logprobs.

Aliases

All aliases

No 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 gemini-3.1-flash-image to gemini-nano-banana-2.1.
Re-check costs: gemini-nano-banana-2.1 costs more than gemini-3.1-flash-image (input +200%, output +150%).

Compared from AIWire's published data when this page loaded. Each fact links to the page it came from. Model pages: gemini-3.1-flash-image, gemini-nano-banana-2.1.