GPT-5 Image vs Sakana Namazu
Sakana Namazu costs 2.5x less per output token than GPT-5 Image ($4.00 vs $10.00 per million). Updated October 22, 2026; no benchmark has tested both models yet.
- Coding
- No data
- Overall
- No data
- Output $/M
- $10.00
- Coding
- No data
- Overall
- No data
- Output $/M
- $4.00
GPT-5 Image or Sakana Namazu: which to pick
Neither model has a coding score yet, so the two cannot be ranked on coding.
Pick GPT-5 Image for a larger context window (400K against 262K tokens).
No benchmark has tested both yet. GPT-5 Image has results on Design Arena: images, Design Arena: graphic design and Design Arena: logos; Sakana Namazu has none yet. 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
Image generation
Design Arena: images
No call
Only GPT-5 Image has a Design Arena: images result, 1191.
Directional only
Long documents
Listed context window
GPT-5 Image
GPT-5 Image takes 400K tokens against 262K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Sakana Namazu
GPT-5 Image $0.015, Sakana Namazu $0.0029 per turn.
List prices
At a glance
- Coding index
- GPT-5 Image not benchmarked, Sakana Namazu 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
- GPT-5 Image $10.00 against Sakana Namazu $4.00 per million output tokens, 2.5x apart.
- Context window
- GPT-5 Image takes 400K tokens, Sakana Namazu 262K.
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.
Image generationDirectional onlyPublic boards, shown as published, kept out of the index3 boards measured
| Benchmark | GPT-5 Image | Sakana Namazu | Leader |
|---|---|---|---|
| Design Arena: images | 1191 | Not measured | Only GPT-5 Image measured |
| Design Arena: graphic design | 1172 | Not measured | Only GPT-5 Image measured |
| Design Arena: logos | 1202 | Not measured | Only GPT-5 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
Sakana Namazu costs less
Repository review
50K input + 3K output tokens
Sakana Namazu costs less
Agent loop
200K input + 10K output tokens
Sakana Namazu 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 | OpenAI GPT-5 Image | Sakana Namazu |
|---|---|---|
| Maker | OpenAI | Sakana |
| Weights | No public weights listed | No public weights listed |
| Released | October 14, 2025 | August 11, 2026 |
| Context window | 400K | 262K |
| Input $/Mtok | $10.00 | $0.95 |
| Output $/Mtok | $10.00 | $4.00 |
| 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 GPT-5 Image better than Sakana Namazu for coding?
Neither model has a coding score yet, so the two cannot be ranked on coding. Pick GPT-5 Image for a larger context window (400K against 262K tokens).
Which is cheaper, GPT-5 Image or Sakana Namazu?
GPT-5 Image costs $10.00 per million input tokens and $10.00 per million output tokens; Sakana Namazu costs $0.95 and $4.00. Cost per solved task is known for neither of them.
Which has the bigger context window, GPT-5 Image or Sakana Namazu?
GPT-5 Image, with 400K tokens against 262K.
Has any benchmark tested both GPT-5 Image and Sakana Namazu?
No benchmark has tested both yet. GPT-5 Image has results on Design Arena: images, Design Arena: graphic design and Design Arena: logos; Sakana Namazu has none yet. Compare them on price and context instead. Data as of October 22, 2026.