DeepSeek V4 Pro vs Fugu Ultra v2
Detailed technical comparison between DeepSeek V4 Pro (DeepSeek) and Fugu Ultra v2 (Sakana AI). Review live API token pricing, context window capabilities, time-to-first-token latency, and verified benchmark scores side-by-side.
Comparison Snapshot
DeepSeek V4 Pro
1,048,576 tokensTie
Equal CapabilityTie
Equal SpeedDeepSeek V4 Pro
$0.92 / MTokDeepSeek V4 Pro
DeepSeek V4 Pro is an advanced artificial intelligence model engineered by DeepSeek. Tailored for complex multi-step reasoning, programming synthesis, and extended document comprehension, DeepSeek V4 Pro represents a key architectural iteration in the DeepSeek model family. First released in 2026-04-24, it serves enterprise developers, research teams, and autonomous system architects requiring strict instruction compliance. Featuring an input capacity of 1,048,576 tokens (approximately 1,398 words), DeepSeek V4 Pro processes multi-file code repositories, lengthy technical reports, and complex prompts in a single inference call.
Fugu Ultra v2
Fugu Ultra v2 is an advanced artificial intelligence model engineered by Sakana AI. Tailored for complex multi-step reasoning, programming synthesis, and extended document comprehension, Fugu Ultra v2 represents a key architectural iteration in the Sakana AI model family. First released in 2026-09-11, it serves enterprise developers, research teams, and autonomous system architects requiring strict instruction compliance. Featuring an input capacity of 1,000,000 tokens (approximately 1,333 words), Fugu Ultra v2 processes multi-file code repositories, lengthy technical reports, and complex prompts in a single inference call.
Technical Specifications
🏆 = Superior Spec| Specification | DeepSeek V4 Pro | Fugu Ultra v2 |
|---|---|---|
| Provider | DeepSeek | Sakana AI |
| Context Window | 1,048,576 tokens🏆 | 1,000,000 tokens |
| Agent Suitability | 94/100 (est.) | Not yet benchmarked |
| Time to First Token (TTFT) | 280 ms (est.) | No public TTFT data |
| Deployment Model | managed api | managed api |
| Production Stability | Stable GA (est.) | Beta Access (est.) |
| API Available | Yes | Yes |
| Released Date | 2026-04-24 | 2026-09-11 |
API Pricing Comparison
Input Price per Million Tokens
DeepSeek V4 Pro
$0.92
Fugu Ultra v2
$5.00
Output Price per Million Tokens
DeepSeek V4 Pro
$1.85
Fugu Ultra v2
$30.00
💡 Cost Ratio: DeepSeek V4 Pro is 5.4x cheaper per input token than Fugu Ultra v2.
Want to test both models live?
Run side-by-side prompt benchmarks in our dynamic multi-model Sandbox. Compare execution speeds, latency metrics, and compute actual costs in real-time.
Benchmark Performance Metrics
Standardized Scores (0–100%)Scores show verified raw accuracy percentages across standardized AI evaluation suites. Higher bars indicate superior performance in that domain.
DeepSeek V4 Pro Quirks & Gotchas
- ▸MoE architecture — cold-start latency on first request, use keep-alive
- ▸Best cost-performance ratio of any frontier model — strong tool calling for agentic use
Fugu Ultra v2 Quirks & Gotchas
No developer gotchas reported.
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