Choose Anthropic: Claude Opus 5.5 (batch) if…
No advantage on the data we track — pick it for provider preference or output quality on your own prompts.
Anthropic: Claude Opus 5.5 (batch) vs Sakana: Fugu Max
Sakana: Fugu Max comes out ahead on the data we track: 1 advantage and none for Anthropic: Claude Opus 5.5 (batch).
Key numbers
| Spec | Anthropic: Claude Opus 5.5 (batch) | Sakana: Fugu Max |
|---|---|---|
| Provider | Anthropic | Sakana |
| Input price (per 1M tokens) | $2.00 | $2.00 |
| Output price (per 1M tokens) | $10.00 | $6.00 |
| Blended price (3:1 input/output) | $4.00 | $3.00 |
| Cheaper than … of all models we track | 15% | 20% |
| Context window | 1M tokens (~1,500 pages) | 1M tokens (~1,500 pages) |
| Larger context than … of all models | 68% | 68% |
| Max output per response | 128K tokens (~96,000 words) | 128K tokens (~96,000 words) |
| Input types | text, image, file | text, image, file |
| Output types | text | text |
| Free variant | No | No |
| Listed since | 2026-09-22 | 2026-09-11 |
Advertisement
What it costs for real workloads
Monthly cost at list price for five common workloads. Token counts per unit are stated so you can scale them to your own traffic. A workload that does not fit a model's context window is marked rather than priced.
| Workload (per month) | Anthropic: Claude Opus 5.5 (batch) | Sakana: Fugu Max | Difference |
|---|---|---|---|
| Customer-support chatbot 50,000 conversations — each a 6-turn conversation (1,500 in / 400 out tokens) | $350 | $270 | Sakana: Fugu Max saves $80.00 |
| RAG search over documents 20,000 questions — each a question answered from ~8 retrieved passages (6,000 in / 500 out tokens) | $340 | $300 | Sakana: Fugu Max saves $40.00 |
| Coding / tool-using agent 2,000 tasks — each a multi-step task with tool calls and file context (60,000 in / 6,000 out tokens) | $360 | $312 | Sakana: Fugu Max saves $48.00 |
| Batch summarisation 10,000 documents — each a 6,000-word report summarised to a page (8,000 in / 600 out tokens) | $220 | $196 | Sakana: Fugu Max saves $24.00 |
| Long-document analysis 500 documents — each a 150-page contract or codebase read in one pass (100,000 in / 2,000 out tokens) | $110 | $106 | Sakana: Fugu Max saves $4.00 |
Capabilities side by side
| Capability | Anthropic: Claude Opus 5.5 (batch) | Sakana: Fugu Max | What it lets you do |
|---|---|---|---|
| Tool / function calling | ✓ Yes | ✓ Yes | call your APIs and run agent loops |
| Structured output (JSON schema) | ✓ Yes | ✓ Yes | return JSON that validates against your schema |
| Reasoning / thinking mode | ✓ Yes | ✓ Yes | spend extra tokens thinking before answering hard problems |
| Image input | ✓ Yes | ✓ Yes | read screenshots, charts and scanned pages |
| Audio input | — | — | take speech or audio directly |
| File / PDF input | ✓ Yes | ✓ Yes | accept documents without your own parsing step |
| Image output | — | — | generate images, not just text |
| Built-in web search | ✓ Yes | ✓ Yes | answer from live web results |
| Seed (reproducible sampling) | — | — | repeat a generation for tests and evals |
| Log-probabilities | — | — | read token confidence for classification and scoring |
From each model's published parameters and input/output types. “—” means not advertised, not proven absent.
Price history
- Anthropic: Claude Opus 5.5 (batch): price unchanged since we started tracking it on 2026-09-23.
- Sakana: Fugu Max: price unchanged since we started tracking it on 2026-09-12.
Which should you choose?
Choose Sakana: Fugu Max if…
- cost matters at scale — it is 25% cheaper on a typical 3:1 input/output mix ($270 vs $350 a month for 50,000 support chats)
Frequently asked questions
Is Anthropic: Claude Opus 5.5 (batch) better than Sakana: Fugu Max?
Sakana: Fugu Max comes out ahead on the data we track: 1 advantage and none for Anthropic: Claude Opus 5.5 (batch).
Which is cheaper, Anthropic: Claude Opus 5.5 (batch) or Sakana: Fugu Max?
Sakana: Fugu Max is cheaper: $3.00 vs $4.00 per 1M tokens at a typical 3:1 input/output mix, 25% less. For 50,000 support conversations a month that is $270 against $350.
How much do Anthropic: Claude Opus 5.5 (batch) and Sakana: Fugu Max cost per million tokens?
Anthropic: Claude Opus 5.5 (batch) costs $2.00 per 1M input tokens and $10.00 per 1M output tokens; Sakana: Fugu Max costs $2.00 input and $6.00 output. Output tokens are billed separately, so long answers shift the gap.
Which has the bigger context window, Anthropic: Claude Opus 5.5 (batch) or Sakana: Fugu Max?
Both take 1M tokens per request — roughly 1,500 pages of text.
Do Anthropic: Claude Opus 5.5 (batch) and Sakana: Fugu Max support function calling and JSON output?
Tool calling — Anthropic: Claude Opus 5.5 (batch): yes, Sakana: Fugu Max: yes. JSON-schema structured output — Anthropic: Claude Opus 5.5 (batch): yes, Sakana: Fugu Max: yes.
Can Anthropic: Claude Opus 5.5 (batch) or Sakana: Fugu Max read images?
Yes, both accept image input.
Is Anthropic: Claude Opus 5.5 (batch) or Sakana: Fugu Max free to use?
No free variant is listed for either; both are pay-per-token.
What is the maximum output length of Anthropic: Claude Opus 5.5 (batch) and Sakana: Fugu Max?
Anthropic: Claude Opus 5.5 (batch) can write up to 128K tokens (about 96,000 words) per response; Sakana: Fugu Max up to 128K (about 96,000 words).
When were Anthropic: Claude Opus 5.5 (batch) and Sakana: Fugu Max released?
Anthropic: Claude Opus 5.5 (batch) was listed on 2026-09-22; Sakana: Fugu Max on 2026-09-11.
About the two models
Anthropic: Claude Opus 5.5 (batch)
Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...
Full Anthropic: Claude Opus 5.5 (batch) specs →Sakana: Fugu Max
Fugu Max is the cost-performance model in Sakana AI's Fugu family. Rather than a single monolithic model, Fugu is a learned multi-agent orchestration system: a language model trained to route...
Full Sakana: Fugu Max specs →