GPT-5.6 Terra vs Sakana Namazu: Specs & Benchmark Comparison
GPT-5.6 Terra is developed by OpenAI, while Sakana Namazu comes from Sakana AI. GPT-5.6 Terra was released in July 2026, and Sakana Namazu followed a month later in August 2026.
We have 45 benchmark results for GPT-5.6 Terra 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 2 times cheaper than GPT-5.6 Terra at $2 and $12. GPT-5.6 Terra takes the larger context window at 1M tokens, compared with 256K for Sakana Namazu. Both accept text and images as input. On tooling, only GPT-5.6 Terra supports function calling and only GPT-5.6 Terra offers structured output.
| Characteristic | GPT-5.6 Terra | Sakana Namazu |
|---|---|---|
| Company | OpenAI | Sakana AI |
| Release Date | July 9, 2026 | August 3, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 1.1M | 256K |
| Context (output) | 128K | 256K |
| Input Price / 1M | $2.00 | $0.95 |
| Output Price / 1M | $12.00 | $4.00 |
| Average Score | 59.0% | 92.4% |
Verdict
Sakana Namazu leads in 2 out of 4 comparison categories.
Both models show comparable average scores: GPT-5.6 Terra — 0.6, Sakana Namazu — 0.9.
Sakana Namazu is 2.8x cheaper: input $0.95/1M vs $2.00/1M tokens.
GPT-5.6 Terra supports a larger context: 1M vs 256K tokens.
Sakana Namazu is newer: released 8/3/2026 vs 7/9/2026.
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Frequently Asked Questions
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The GPT-5.6 Terra 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 GPT-5.6 Terra or Sakana Namazu page. See also the complete list of AI model comparisons.