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Sakana · Language model
Fugu Ultra v2
sakana/fugu-ultra-v2- Language
Fugu Ultra v2 is the higher-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...
Specifications
- Context window
- 1,000,000 tokens
- Max output
- 128,000 tokens
- Input
- text, image, file
- Output
- text
- Reasoning effort
- max, xhigh, high (always on)
- Tokenizer
- Other
- Knowledge cutoff
- 2026-08-28
Supported parameters
Accepted by the model and forwarded as-is by the gateway.
- reasoning
- reasoning_effort
- structured_outputs
- tool_choice
- tools
Use it
POST /api/v1/chat/completions · MCP chat · full reference
curl https://omnirail.org/api/v1/chat/completions \
-H "Authorization: Bearer $OMNIRAIL_KEY" -H "Content-Type: application/json" \
-d '{"model":"sakana/fugu-ultra-v2","messages":[{"role":"user","content":"Hello"}],"max_tokens":300}'