Claude Sonnet 5 Paid vs SASakana Namazu Paid
Claude Sonnet 5 vs Sakana Namazu compared — price per token, context window, multimodality, openness and which to choose. Full 2026 breakdown.
Claude Sonnet 5 — full profile › · Sakana Namazu — full profile ›
Prices & specs refreshed from live data · olud.ai
Open-model prices = cheapest provider via OpenRouter; official maker rates may be higher.
$10 /M outputManaged API (no infra to run)
$4 /M outputManaged API (no infra to run)
Claude Sonnet 5 vs Sakana Namazu specs
| Spec | Claude Sonnet 5 | Sakana Namazu | Winner |
|---|---|---|---|
| Maker | Anthropic | Sakana AI | – |
| Type | Proprietary | Proprietary | – |
| Context window | 1M tokens | 262K tokens | |
| Input price | $2/M | $0.95/M | SASakana Namazu |
| Output price | $10/M | $4/M | SASakana Namazu |
| Vision / multimodal | Yes | Yes | = Tie |
| Tool / function calling | Yes | Yes | = Tie |
| Self-hostable | No (API only) | No (API only) | – |
| License | Proprietary | Proprietary | – |
Price gap & when to choose each
Sakana Namazu is ~2.5× cheaper than Claude Sonnet 5 on output tokens ($4 vs $10 per M tokens).
- You want frontier performance through a managed API
- You need the longer 1M context window
- You value reliability & ecosystem
- You don't want to manage infrastructure
- You want frontier performance through a managed API
- You want the lower output price
- You value reliability & ecosystem
- You don't want to manage infrastructure
Feature comparison
| Capability | Claude Sonnet 5 | Sakana Namazu |
|---|---|---|
| Open weights (downloadable) | ✗ | ✗ |
| Self-hostable | ✗ | ✗ |
| Runs fully offline | ✗ | ✗ |
| Vision / multimodal | ✓ | ✓ |
| Tool / function calling | ✓ | ✓ |
| 1M+ context window | ✓ | ✗ |
Benchmarks: Claude Sonnet 5 vs Sakana Namazu
Independent benchmark scores measured by Artificial Analysis. Higher is better (except latency).
Benchmark data by Artificial Analysis.
How Claude Sonnet 5 and Sakana Namazu score
| Criterion | Claude Sonnet 5 | Sakana Namazu |
|---|---|---|
| Cost-efficiency | 3.5 | 4.0 |
| Context window | 5.0 | 4.0 |
| Openness | 1.5 | 1.5 |
| Self-hosting | 1.0 | 1.0 |
| Multimodality | 5.0 | 5.0 |
Scores come from live data — output price (cost), context length, open vs closed weights (openness & self-hosting) and vision/tool support (multimodality). Raw task quality isn't scored here; it depends on your benchmark — see the verdict.
What each model is
Claude Sonnet 5 Paid
Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reasoning effort levels (low, medium, high, max,...
Sakana Namazu Paid
Sakana Namazu is a Japanese-specialized reasoning model from Sakana AI, based on Kimi K2.6 with additional training for Japanese language and business contexts. It is suited for Japanese instruction following,...
Other models in these families
These variants are tracked but not compared here — one page per family keeps the comparison readable.
Frequently asked questions
Claude Sonnet 5 vs Sakana Namazu — which is cheaper?
Sakana Namazu is cheaper on output ($4/M vs $10/M).
Which has the larger context window?
Claude Sonnet 5 offers the larger context window (1M tokens).
Claude Sonnet 5 vs Sakana Namazu — which should I pick in 2026?
Choose Sakana Namazu for the lower output price ($4/M vs $10/M). Choose Claude Sonnet 5 if you need the larger 1M context window.
People also compare
Explore more open-source AI
Browse the full open-source model leaderboard, thousands of tools and live benchmarks — all in one place.
Open the leaderboard →