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Cogito v2.1 671B
Deep Cogito · Released Nov 2025
Cogito v2.1 is a 671-billion parameter language model with a 128k token context window.
- Strengths
- The large parameter count and extended context window support complex reasoning and handling of lengthy documents.
- Best for
- Long-form document analysis, multi-document synthesis, and tasks requiring sustained reasoning over extended inputs.
- Limitations
- The model size makes inference slower and more resource-intensive than smaller alternatives; it may be overkill for simple classification or short-form generation tasks.
Input / 1M
$1.25
Output / 1M
$1.25
Cached input / 1M
—
Context window
128K
Price history
Snapshots
| Effective | Input | Output | Cached in | Note | Source |
|---|---|---|---|---|---|
| 11 Jun 2026 | $1.25 | $1.25 | — | Imported from OpenRouter | openrouter.ai |