Nano Banana 2 (Gemini 3.1 Flash Image) vs Nano Banana 2 (Gemini 3.1 Flash Image Preview)
Nano Banana 2 (Gemini 3.1 Flash Image) at $0.575 in and $3.45 out and Nano Banana 2 (Gemini 3.1 Flash Image Preview) at $0.575 in and $3.45 out — per million tokens, from the same wallet.
Nano Banana 2 (Gemini 3.1 Flash Image)
0.56¢
for a client proposal
$0.575 in · $3.45 out / 1M
131K context · released 2 months ago
Nano Banana 2 (Gemini 3.1 Flash Image Preview)
0.56¢
for a client proposal
$0.575 in · $3.45 out / 1M
66K context · released 5 months ago
Asking all both at once — identical prompt, identical context — costs about 1.1¢ for a typical client proposal.
At a glance
- All 2 cost the same on input.
- Largest context: Nano Banana 2 (Gemini 3.1 Flash Image) at 131K tokens — about 190 pages.
Cost per task
Estimated totals at the rates above. Solid bar is input, lighter bar is output.
Quick code fix
2K in · 500 outDraft a client proposal from notes
5K in · 800 outContext-heavy session (Alyph workspace)
155K in · 4K outAnalyze a 50-page legal contract
35K in · 1K outLarge architecture refactor
250K in · 3K outSolid part of each bar is input tokens, the lighter part is output. Models that don’t fit a task are marked instead of priced.
Cost vs Token Amount
Drag the slider to adjust the split between input and output workload.
Adjust the ratio slider to change how output tokens influence the final price for equivalent workloads.
Pricing
Specs
Try it with real numbers
2K tokens in · 500 tokens out.
Nano Banana 2 (Gemini 3.1 Flash Image Preview)
0.29¢
for this task
40% input · 60% output
Full pricing →All 2, same prompt and context: 0.57¢. That is the entire cost of the comparison.
Your $5 welcome credit covers about 869 of these.
Which should you pick?
For long documents, Nano Banana 2 (Gemini 3.1 Flash Image) has the largest context window here — 131K tokens.
On price they are identical: about 0.56¢ for a typical task each.
Or don’t pick. Send the identical prompt to all both, read the answers side by side, and keep the winner. How to run a fair bake-off →
Questions, answered
Which is cheaper, Nano Banana 2 (Gemini 3.1 Flash Image) or Nano Banana 2 (Gemini 3.1 Flash Image Preview)?
Which has the largest context window?
Can I run Nano Banana 2 (Gemini 3.1 Flash Image) and Nano Banana 2 (Gemini 3.1 Flash Image Preview) side by side on Alyph?
Ask both at once
Identical prompt, identical context, answers side by side — about 1.1¢ for a typical client proposal. Free to start, with $5 of credit.