GPT-5.6 Cyber vs Fugu Ultra v2
Fugu Ultra v2 comes out ahead, 33 to 30 on our weighted score, and it is the cheaper option too.
OpenAIGPT-5.6 Cyber
30/100- ECI—
- Price$12.50 / $75.00
- Context400K
- Our pick
Sakana AIFugu Ultra v2
33/100- ECI—
- Price$5.00 / $30.00
- Context1M
Add a model
Make it a three-way comparison.
Fugu Ultra v2 is our pick
Fugu Ultra v2 is the better all-round choice, scoring 33/100 against GPT-5.6 Cyber (30). It leads on context window. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
- CapabilityNot enough dataNo independent benchmark covers every model here yet
- Lowest priceFugu Ultra v2Fugu Ultra v2 $11.25 · GPT-5.6 Cyber $28.13 per 1M tokens (3:1 blend)
- Longest contextFugu Ultra v2Fugu Ultra v2 1,000,000 · GPT-5.6 Cyber 400,000 tokens
- Widest inputsFugu Ultra v2GPT-5.6 Cyber: Text, Images · Fugu Ultra v2: Text, Images, PDFs
- Self-hostingNo open weightsBoth are available only through APIs
| Measure | Weight | GPT-5.6 Cyber | Fugu Ultra v2 |
|---|---|---|---|
| Price | 50% | 0 | 0 |
| Inputs & features | 30% | 70 | 70 |
| Context window | 20% | 44 | 60 |
| Overall | 100% | 30/100 | 33/100 |
Left out because at least one model lacks the data: capability. The remaining weights were rescaled.
Every spec in one table
Highlighted cells lead their row. Dashes mean the data is not published.
| Specification | GPT-5.6 CyberOpenAI | Fugu Ultra v2Sakana AI |
|---|---|---|
| Capability | ||
| Capabilities Index (ECI) | — | — |
| ECI rank | — | — |
| Price per million tokens | ||
| Input | $12.50 | $5.00 (best) |
| Output | $75.00 | $30.00 (best) |
| Cached input | $1.25 | — |
| Blended (3:1) | $28.13 | $11.25 (best) |
| Long-context rate | Same rate | Same rate |
| Price source | Official OpenAI API | Median of 6 providers |
| Limits | ||
| Context window | 400,000 tokens | 1,000,000 tokens (best) |
| Max output | 128,000 tokens | 128,000 tokens |
| Inputs and features | ||
| Text | Yes | Yes |
| Images | Yes | Yes |
| PDFs | No | Yes |
| Audio | No | No |
| Video | No | No |
| Reasoning | Yeslow · medium · high · xhigh · max | Yes |
| Tool calling | Yes | Yes |
| Structured output | Yes | No |
| Availability | ||
| Weights | Proprietary | Proprietary |
| API model ID | gpt-daybreak-red-latest | — |
| API providers | 1 | 6 (best) |
| Released | Aug 7, 2026 | Sep 11, 2026 |
| Knowledge cutoff | Feb 16, 2026 | Aug 28, 2026 |
What would a month cost?
Enter your expected volume in millions of tokens. List prices only; caching and batch discounts would lower these.
- GPT-5.6 Cyber$275.00
- Fugu Ultra v2$110.00
Which should you choose?
Which is better: GPT-5.6 Cyber or Fugu Ultra v2?
Fugu Ultra v2 is the better all-round choice, scoring 33/100 against GPT-5.6 Cyber (30). It leads on context window. The score weighs price 50%, inputs & features 30%, context window 20%. None of the shared benchmarks cover every model here yet, so capability is left out of this verdict.
Which is cheaper, GPT-5.6 Cyber or Fugu Ultra v2?
Fugu Ultra v2 is cheaper at $5.00 input / $30.00 output per million tokens (median across 6 API providers). GPT-5.6 Cyber costs $12.50 input / $75.00 output per million tokens (official OpenAI API price). At a typical mix of three input tokens to one output token, that is $11.25 per million tokens for Fugu Ultra v2 versus $28.13 for GPT-5.6 Cyber (2.5× as much).
Which scores higher on benchmarks?
There is no independent benchmark that covers both models yet. GPT-5.6 Cyber has not been scored yet and Fugu Ultra v2 has not been scored yet.
Which is better for coding?
There are no published SWE-bench Verified results for GPT-5.6 Cyber and Fugu Ultra v2 yet, so there is no like-for-like coding score. Test both on a sample of your own tasks. Both support tool calling for agent workflows.
Which has the bigger context window?
Fugu Ultra v2 has the largest context window at 1,000,000 tokens, against 400,000 for GPT-5.6 Cyber. Maximum output per response: GPT-5.6 Cyber up to 128,000, Fugu Ultra v2 up to 128,000 tokens.
Which can read images, PDFs, audio or video?
GPT-5.6 Cyber accepts text and images; Fugu Ultra v2 accepts text, images and PDFs. Fugu Ultra v2 handles the widest range of inputs.
Are any of these open source?
No. GPT-5.6 Cyber and Fugu Ultra v2 are proprietary and only available through APIs and apps.
Which is newer?
Fugu Ultra v2 is the newest, released Sep 11, 2026. GPT-5.6 Cyber came out Aug 7, 2026. Knowledge cutoff: GPT-5.6 Cyber Feb 16, 2026, Fugu Ultra v2 Aug 28, 2026.
How do you decide the winner?
Each model gets a 0–100 score on capability (50%, independent benchmark results); price (25%, blended price per million tokens (3 input : 1 output), log scale); inputs & features (15%, image, PDF, audio and video input, tool calling, structured output and reasoning); context window (10%, maximum tokens per request, log scale). Dimensions missing for any model are dropped and the remaining weights rescaled, so every model is judged on the same evidence. Specs and prices come from public model listings and the labs’ own API pages; capability scores come from independent benchmark runs. Data updated Nov 2, 2026.
