Claude Opus 5 vs Sakana Namazu: Specs & Benchmark Comparison
Claude Opus 5 is developed by Anthropic, while Sakana Namazu comes from Sakana AI. Claude Opus 5 was released in July 2026, and Sakana Namazu followed a month later in August 2026.
We have 13 benchmark results for Claude Opus 5 and 3 benchmark results for Sakana Namazu, but they were measured on different benchmarks, so there is no like-for-like scoreboard.
Sakana Namazu is the cheaper API at $0.95 per million input tokens and $4 per million output tokens, roughly 5 times cheaper than Claude Opus 5 at $5 and $25. Claude Opus 5 takes the larger context window at 1M tokens, compared with 256K for Sakana Namazu. Both accept text and images as input. On tooling, only Claude Opus 5 supports function calling and only Claude Opus 5 offers structured output.
| Characteristic | Claude Opus 5 | Sakana Namazu |
|---|---|---|
| Company | Anthropic | Sakana AI |
| Release Date | July 24, 2026 | August 3, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.0M | 256K |
| Context (output) | 128K | 256K |
| Input Price / 1M | $5.00 | $0.95 |
| Output Price / 1M | $25.00 | $4.00 |
| Average Score | 55.0% | 92.4% |
Verdict
Both models show equal results — the choice depends on your specific use case.
Both models show comparable average scores: Claude Opus 5 — 0.5, Sakana Namazu — 0.9.
Sakana Namazu is 6.1x cheaper: input $0.95/1M vs $5.00/1M tokens.
Claude Opus 5 supports a larger context: 1M vs 256K tokens.
Both models were released around the same time: 7/24/2026 and 8/3/2026.
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Frequently Asked Questions
Which is better for coding — Claude Opus 5 or Sakana Namazu?
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The Claude Opus 5 and Sakana Namazu comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the Claude Opus 5 or Sakana Namazu page. See also the complete list of AI model comparisons.