GPT-5.1 Codex High vs Sakana Namazu: Specs & Benchmark Comparison
| Characteristic | GPT-5.1 Codex High | Sakana Namazu |
|---|---|---|
| Company | OpenAI | Sakana AI |
| Release Date | November 11, 2025 | August 3, 2026 |
| Parameters | — | — |
| Multimodal | Yes | Yes |
| Context (input) | 400K | 256K |
| Context (output) | 128K | 256K |
| Input Price / 1M | $1.25 | $0.95 |
| Output Price / 1M | $10.00 | $4.00 |
| Average Score | 1.0 | 0.9 |
Verdict
Sakana Namazu leads in 2 out of 4 comparison categories.
Overall Performance
Both models show comparable average scores: GPT-5.1 Codex High — 1.0, Sakana Namazu — 0.9.
API Cost
Sakana Namazu is 2.3x cheaper: input $0.95/1M vs $1.25/1M tokens.
Context Window
GPT-5.1 Codex High supports a larger context: 400K vs 256K tokens.
Recency
Sakana Namazu is newer: released 8/3/2026 vs 11/11/2025.
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Frequently Asked Questions
Which is better for coding — GPT-5.1 Codex High or Sakana Namazu?
Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.
Which model is cheaper — GPT-5.1 Codex High or Sakana Namazu?
Sakana Namazu is cheaper for input: $0.95 per 1M tokens vs $1.25.
Which has a larger context window — GPT-5.1 Codex High or Sakana Namazu?
GPT-5.1 Codex High supports a larger context: 400,000 tokens vs 256,000.
The GPT-5.1 Codex High 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-5.1 Codex High or Sakana Namazu page. See also the complete list of AI model comparisons.