Sakana AI 推出的 Fugu Ultra 人工智能模型，具备 1M 上下文窗口，输入价格为 $1.5/百万 Token，输出价格为 $6/百万 Token，专为高质量生产环境、推理与自动化工作流打造。
Technical Specifications
- Provider
- Sakana AI
- Category
- flagship
- Release Date
- 2026-06
- Batch API Discount
- 50% off async batch
- Consumer Subscription
- API Pay-as-you-go
- Reasoning Effort Control
- Configurable (Low / Med / High)
- Structured Outputs
- Yes
- Output Modalities
- text
- Official Documentation
- Visit Official Docs ↗
Data Privacy, Licensing & Deployment Governance
Official Provider Release Intelligence, API Quotas & Agentic Specs
- Official API Model ID (SDK String)
- fugu-ultra
- Supported SDK & API Protocol
- Sakana AI REST API (OpenAI-Compatible)
- Lifecycle & Deprecation Status
- Active GA (Guaranteed support through 2028+)
- Production Rate Limits (RPM & TPM)
- 5,000 – 15,000 RPM (Production Tier) · 4,000,000 – 10,000,000 TPM
- Long-Context Pricing Tier (>128K / >200K)
- Flat rate ($1.5/1M in) across full 1000K window
- Prompt Cache Write & TTL Policy
- Cached input at $0.15/1M tokens
- Computer Use & Browser GUI Agent
- API / CLI Tool-Use & DOM Agent ready (no raw pixel desktop click loop)
- MCP & Parallel Tool Calling
- Native MCP Client/Server ready · Parallel function calling · 100% Strict JSON Schema
- Web Search Grounding & Code Sandbox
- Supported via external Tavily/Exa Search & E2B/Docker Sandbox tools
- Fine-Tuning & Distillation Support
- API Prompt Engineering & RAG Distillation
- Multimodal Tokenization Billing
- Text BPE (~4 chars/token)
- Weights Precision & Quantization
- Cloud-Hosted Proprietary (FP8 / BF16 Tensor Core Cluster)
- Minimum GPU VRAM Requirement
- Zero Local VRAM Required (100% Serverless Cloud API)
- Supported Inference Engines
- Managed Sakana AI Cloud API
- System Card & Safety Framework
- Sakana AI Production Safety & Alignment Verified
- Enterprise Compliance (SOC2 / HIPAA / ZDR)
- SOC2 Type II · GDPR · Zero Data Retention (ZDR) & HIPAA BAA Available on Enterprise Tier
Fugu Ultra Cost, Context, Hardware & API Integration
For single-user chat, a $20/mo subscription caps your bill below this API volume.
Break-even point: ~72 requests/day equals $20/month.
Same Monthly Workload Cost Across Popular Reference Models
Live Prompt Paste Tokenizer & Cost Counter
Paste real system instructions, JSON schemas, or code to measure BPE token counts across tokenizers.
Hybrid Prompt Routing Cascade Simulator
Route routine queries to a fast lightweight model ($0.15/1M) and escalate only complex reasoning turns to Fugu Ultra:
Benchmark Scores & 6-Axis Capability Radar
- GPQA Diamond
- 67%
- MMLU-Pro
- 83%
- HumanEval
- 92%
- Chatbot Arena Elo
- 1370pts
Strengths
- 由 Sakana AI 研发的高精度 Evolutionary Multi-Model Merged Transformer 架构，支持 1M 上下文窗口
- 极具竞争力的 API 定价（输入 $1.5/1M，输出 $6/1M），支持高速推理与工具调用
- 在代码生成、逻辑推理与多语言处理基准测试中表现出色
Limitations & Trade-offs
- 超长上下文请求需要规划 Token 成本与并发配额
- 针对特定垂直领域任务建议结合系统提示词与检索增强（RAG）以获得最佳效果
Editorial Assessment
Fugu Ultra 是 Sakana AI 旗下极具代表性的模型，在性能、速度与 API 成本之间实现了卓越平衡。
Best for: 企业级 AI 自动化、代码研发、智能体（Agent）工作流以及 Sakana AI 生态深度集成
Compare Fugu Ultra
Frequently Asked Questions about Fugu Ultra
How much does the Fugu Ultra API cost per 1M tokens?+
Fugu Ultra by Sakana AI is priced at $1.5 per 1M input tokens and $6 per 1M output tokens. With prompt caching enabled, cached input tokens cost $0.15 per 1M tokens, and asynchronous Batch API requests receive a 50% discount.
Should I use a $20/month subscription or the Fugu Ultra pay-as-you-go API?+
A flat $20/month consumer subscription is predictable for daily interactive chat and manual coding. However, if you are building software, running automated workflows, or sending low-to-moderate volume with prompt caching enabled, the pay-as-you-go API is typically far more cost-effective and offers higher rate limits without manual UI caps.
How many words and pages fit in Fugu Ultra's context window?+
Fugu Ultra features a 1M tokens context window, which equals approximately 750,000 English words or ~2,000 standard single-spaced pages in a single prompt. Its maximum output generation per turn is 16,384 tokens.
Can I run Fugu Ultra locally on my own GPU (Open Weights)?+
No, Fugu Ultra is a proprietary closed-weights model hosted by Sakana AI. It cannot be downloaded for local GPU execution and must be accessed via Sakana AI's official API or cloud platform.
Does Sakana AI train on data sent to the Fugu Ultra API, and is commercial use allowed?+
API payloads are excluded from model training by default. License tier: Proprietary Commercial API (Sakana AI Terms). Full commercial ownership of generated outputs. Supported deployment channels include: Sakana AI Cloud API & Enterprise Endpoints.
How does Fugu Ultra perform on coding and reasoning benchmarks?+
Fugu Ultra achieves a composite Intelligence Index of 86/100, scoring N/A% on SWE-bench Verified, 67% on GPQA Diamond, 83% on MMLU-Pro, and 1370 pts on Chatbot Arena Elo.
What is Fugu Ultra best used for?+
Fugu Ultra is best suited for: 企业级 AI 自动化、代码研发、智能体（Agent）工作流以及 Sakana AI 生态深度集成. Assessment: Fugu Ultra 是 Sakana AI 旗下极具代表性的模型，在性能、速度与 API 成本之间实现了卓越平衡。
AI Glossary & Architecture Concepts
View full glossary →Key machine learning concepts and benchmarks relevant to Fugu Ultra:
The basic unit of text that a language model processes, typically representing about 3 to 4 English characters or roughly 0.75 words. For example, the sentence "Artificial intelligence is fast" breaks down into about 5 tokens.
A standardized evaluation suite used to objectively measure and rank an AI model's capabilities across specific tasks — such as SWE-bench Verified for software engineering, AIME for competitive math, or MMLU for general knowledge.
The maximum number of tokens a model can consider at once — both the input it reads and the output it writes. A 1,000,000-token context window can hold roughly 750,000 English words in a single request.
An AI model trained via reinforcement learning to spend dynamic compute thinking through complex logic, math, and architectural problems before outputting a solution. Examples include OpenAI o1, o3, and DeepSeek R1.
A step-by-step reasoning technique where an AI model generates intermediate problem-solving thoughts before arriving at a final answer. Native reasoning models like OpenAI o3 and DeepSeek R1 use CoT to solve complex math and coding challenges.
The ability of a language model to recognize when an external capability is needed and output structured JSON arguments to invoke external APIs, databases, or terminal commands. The runtime executes the tool and passes results back to the model.
Benchmark scores, token prices, and rate limits evolve rapidly as AI labs release model updates. Always verify current specifications and pricing on the official provider documentation.