Nano Banana 2 (Gemini 3.1 Flash Image Preview) vs Sonar Reasoning Pro
Updated October 21, 2026. No benchmark has tested both models yet. Coding is ranked on the Vibe Coding Index; every other board is shown as published.
- Coding
- No data
- Overall
- No data
- Output $/M
- $3.00
- Coding
- No data
- Overall
- 11.8
- Output $/M
- $8.00
Decision reading
Neither model has a coding score yet, so the two cannot be ranked on coding.
Nano Banana 2 (Gemini 3.1 Flash Image Preview) has the edge where output tokens cost 2.7x less.
No benchmark has tested both yet. Nano Banana 2 (Gemini 3.1 Flash Image Preview) has results on Design Arena: images, Design Arena: graphic design and Design Arena: logos; Sonar Reasoning Pro on AA Intelligence Index. Compare them on price and context instead.
Which one for your work
Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.
Coding
Vibe Coding Index, six public coding benchmarks
No call
Neither has a coding score yet.
One side not measured
Intelligence
AA Intelligence Index
No call
Only Sonar Reasoning Pro has a AA Intelligence Index result, 11.8.
Directional only
Image generation
Design Arena: images
No call
Only Nano Banana 2 (Gemini 3.1 Flash Image Preview) has a Design Arena: images result, 1269.
Directional only
Long documents
Listed context window
Sonar Reasoning Pro
Sonar Reasoning Pro takes 128K tokens against 66K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Nano Banana 2 (Gemini 3.1 Flash Image Preview)
Nano Banana 2 (Gemini 3.1 Flash Image Preview) $0.0020, Sonar Reasoning Pro $0.0060 per turn.
List prices
At a glance
- Coding index
- Nano Banana 2 (Gemini 3.1 Flash Image Preview) not benchmarked, Sonar Reasoning Pro not benchmarked.
- Widest category
- None yet: no category has been tested on both models.
- Widest single gap
- None yet: no benchmark has tested both models.
- Output price
- Nano Banana 2 (Gemini 3.1 Flash Image Preview) $3.00 against Sonar Reasoning Pro $8.00 per million output tokens, 2.7x apart.
- Context window
- Nano Banana 2 (Gemini 3.1 Flash Image Preview) takes 66K tokens, Sonar Reasoning Pro 128K.
Benchmark by benchmark
Every board either model has a result on, a category to a fold; bars are each result on a 0 to 100 scale. Only one model is measured on each, so no row names a leader.
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | Nano Banana 2 (Gemini 3.1 Flash Image Preview) | Sonar Reasoning Pro | Leader |
|---|---|---|---|
| AA Intelligence Index | Not measured | 11.8 | Only Sonar Reasoning Pro measured |
| Neither model has a result on the other 1 board here | |||
Image generationDirectional onlyPublic boards, shown as published, kept out of the index3 boards measured
| Benchmark | Nano Banana 2 (Gemini 3.1 Flash Image Preview) | Sonar Reasoning Pro | Leader |
|---|---|---|---|
| Design Arena: images | 1269 | Not measured | Only Nano Banana 2 (Gemini 3.1 Flash Image Preview) measured |
| Design Arena: graphic design | 1249 | Not measured | Only Nano Banana 2 (Gemini 3.1 Flash Image Preview) measured |
| Design Arena: logos | 1248 | Not measured | Only Nano Banana 2 (Gemini 3.1 Flash Image Preview) measured |
| Neither model has a result on the other 2 boards here | |||
What each workload costs
Three fixed token mixes at each model's listed price, so per-token rates become a bill.
Chat turn
1K input + 500 output tokens
Nano Banana 2 (Gemini 3.1 Flash Image Preview) costs less
Repository review
50K input + 3K output tokens
Nano Banana 2 (Gemini 3.1 Flash Image Preview) costs less
Agent loop
200K input + 10K output tokens
Nano Banana 2 (Gemini 3.1 Flash Image Preview) costs less
Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.
Specification differences
The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.
| Specification | Google Nano Banana 2 (Gemini 3.1 Flash Image Preview) | Perplexity Sonar Reasoning Pro |
|---|---|---|
| Maker | Perplexity | |
| Weights | No public weights listed | No public weights listed |
| Released | February 26, 2026 | March 7, 2025 |
| Context window | 66K | 128K |
| Input $/Mtok | $0.50 | $2.00 |
| Output $/Mtok | $3.00 | $8.00 |
| Coding index | Not benchmarked | Not benchmarked |
| Independent measurements behind it | 0 | 0 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Nano Banana 2 (Gemini 3.1 Flash Image Preview) better than Sonar Reasoning Pro for coding?
Neither model has a coding score yet, so the two cannot be ranked on coding. Nano Banana 2 (Gemini 3.1 Flash Image Preview) has the edge where output tokens cost 2.7x less.
Which is cheaper, Nano Banana 2 (Gemini 3.1 Flash Image Preview) or Sonar Reasoning Pro?
Nano Banana 2 (Gemini 3.1 Flash Image Preview) costs $0.50 per million input tokens and $3.00 per million output tokens; Sonar Reasoning Pro costs $2.00 and $8.00. Cost per solved task is known for neither of them.
Which has the bigger context window, Nano Banana 2 (Gemini 3.1 Flash Image Preview) or Sonar Reasoning Pro?
Sonar Reasoning Pro, with 128K tokens against 66K.
Has any benchmark tested both Nano Banana 2 (Gemini 3.1 Flash Image Preview) and Sonar Reasoning Pro?
No benchmark has tested both yet. Nano Banana 2 (Gemini 3.1 Flash Image Preview) has results on Design Arena: images, Design Arena: graphic design and Design Arena: logos; Sonar Reasoning Pro on AA Intelligence Index. Compare them on price and context instead. Data as of October 21, 2026.