Ember-1 vs Nano Banana (Gemini 2.5 Flash Image)
Nano Banana (Gemini 2.5 Flash Image) costs 6.0x less per output token than Ember-1 ($2.50 vs $15.00 per million). Updated October 21, 2026; no benchmark has tested both models yet.
- Coding
- 52.6
- Overall
- No data
- Output $/M
- $15.00
- Coding
- No data
- Overall
- No data
- Output $/M
- $2.50
Ember-1 or Nano Banana (Gemini 2.5 Flash Image): which to pick
Only Ember-1 has a coding score, 52.6 on the Vibe Coding Index; Nano Banana (Gemini 2.5 Flash Image) has none, so the two cannot be ranked on coding.
Pick Nano Banana (Gemini 2.5 Flash Image) for output tokens 6.0x cheaper ($2.50 vs $15.00 per million).
No benchmark has tested both yet. Ember-1 has results on Terminal-Bench 4 (Vals AI), Vibe Code Bench (Vals AI) and Code migration (Vals AI); Nano Banana (Gemini 2.5 Flash Image) on Design Arena: images, Design Arena: graphic design and Design Arena: logos. 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
Only Ember-1 has a coding score, so no call is made.
One side not measured
Image generation
Design Arena: images
No call
Only Nano Banana (Gemini 2.5 Flash Image) has a Design Arena: images result, 1179.
Directional only
Long documents
Listed context window
Ember-1
Ember-1 takes 1.05M tokens against 33K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Nano Banana (Gemini 2.5 Flash Image)
Ember-1 $0.011, Nano Banana (Gemini 2.5 Flash Image) $0.0015 per turn.
List prices
At a glance
- Coding index
- Ember-1 52.6 from 2 benchmarks, Nano Banana (Gemini 2.5 Flash Image) 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
- Ember-1 $15.00 against Nano Banana (Gemini 2.5 Flash Image) $2.50 per million output tokens, 6.0x apart.
- Context window
- Ember-1 takes 1.05M tokens, Nano Banana (Gemini 2.5 Flash Image) 33K.
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.
CodingDirectional onlySix of these boards feed the Vibe Coding Index5 boards measured
| Benchmark | Ember-1 | Nano Banana (Gemini 2.5 Flash Image) | Leader |
|---|---|---|---|
| Terminal-Bench 4 (Vals AI) | 20.7% | Not measured | Only Ember-1 measured |
| Vibe Code Bench (Vals AI) | 83.9% | Not measured | Only Ember-1 measured |
| Code migration (Vals AI) | 32.5% | Not measured | Only Ember-1 measured |
| IOI (Vals AI) | 46.3% | Not measured | Only Ember-1 measured |
| CyberBench (Vals AI) | 69.5% | Not measured | Only Ember-1 measured |
| Neither model has a result on the other 34 boards here | |||
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index7 boards measured
| Benchmark | Ember-1 | Nano Banana (Gemini 2.5 Flash Image) | Leader |
|---|---|---|---|
| Finance Agent (Vals AI) | 51.8% | Not measured | Only Ember-1 measured |
| Tax Agent Bench (Vals AI) | 31.1% | Not measured | Only Ember-1 measured |
| Legal Research Bench (Vals AI) | 44.7% | Not measured | Only Ember-1 measured |
| Excel Modeling Benchmark (Vals AI) | 63.4% | Not measured | Only Ember-1 measured |
| BioMysteryBench (Vals AI) | 67.0% | Not measured | Only Ember-1 measured |
| Terminal-Bench-Science (Vals AI) | 5.7% | Not measured | Only Ember-1 measured |
| Vals Science Index | 31.8% | Not measured | Only Ember-1 measured |
| Neither model has a result on the other 34 boards here | |||
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | Ember-1 | Nano Banana (Gemini 2.5 Flash Image) | Leader |
|---|---|---|---|
| MysteryMechanism (Vals AI) | 22.5% | Not measured | Only Ember-1 measured |
| Neither model has a result on the other 21 boards here | |||
GeneralDirectional onlyPublic boards, shown as published, kept out of the index1 board measured
| Benchmark | Ember-1 | Nano Banana (Gemini 2.5 Flash Image) | Leader |
|---|---|---|---|
| Public Benefits Bench (Vals AI) | 66.2% | Not measured | Only Ember-1 measured |
| Neither model has a result on the other 45 boards here | |||
Image generationDirectional onlyPublic boards, shown as published, kept out of the index3 boards measured
| Benchmark | Ember-1 | Nano Banana (Gemini 2.5 Flash Image) | Leader |
|---|---|---|---|
| Design Arena: images | Not measured | 1179 | Only Nano Banana (Gemini 2.5 Flash Image) measured |
| Design Arena: graphic design | Not measured | 1151 | Only Nano Banana (Gemini 2.5 Flash Image) measured |
| Design Arena: logos | Not measured | 1169 | Only Nano Banana (Gemini 2.5 Flash Image) 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 (Gemini 2.5 Flash Image) costs less
Repository review
50K input + 3K output tokens
Nano Banana (Gemini 2.5 Flash Image) costs less
Agent loop
200K input + 10K output tokens
Nano Banana (Gemini 2.5 Flash Image) 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 | Fireworks Ember-1 | Google Nano Banana (Gemini 2.5 Flash Image) |
|---|---|---|
| Maker | Fireworks | |
| Weights | No public weights listed | No public weights listed |
| Released | September 24, 2026 | October 7, 2025 |
| Context window | 1.05M | 33K |
| Input $/Mtok | $3.00 | $0.30 |
| Output $/Mtok | $15.00 | $2.50 |
| Coding index | 52.6 | Not benchmarked |
| Independent measurements behind it | 2 | 0 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Ember-1 better than Nano Banana (Gemini 2.5 Flash Image) for coding?
Only Ember-1 has a coding score, 52.6 on the Vibe Coding Index; Nano Banana (Gemini 2.5 Flash Image) has none, so the two cannot be ranked on coding. Pick Nano Banana (Gemini 2.5 Flash Image) for output tokens 6.0x cheaper ($2.50 vs $15.00 per million).
Which is cheaper, Ember-1 or Nano Banana (Gemini 2.5 Flash Image)?
Ember-1 costs $3.00 per million input tokens and $15.00 per million output tokens; Nano Banana (Gemini 2.5 Flash Image) costs $0.30 and $2.50. Cost per solved task is known for neither of them.
Which has the bigger context window, Ember-1 or Nano Banana (Gemini 2.5 Flash Image)?
Ember-1, with 1.05M tokens against 33K.
Has any benchmark tested both Ember-1 and Nano Banana (Gemini 2.5 Flash Image)?
No benchmark has tested both yet. Ember-1 has results on Terminal-Bench 4 (Vals AI), Vibe Code Bench (Vals AI) and Code migration (Vals AI); Nano Banana (Gemini 2.5 Flash Image) on Design Arena: images, Design Arena: graphic design and Design Arena: logos. Compare them on price and context instead. Data as of October 21, 2026.