# Cogito v2.1 671B vs Gemini 3.5 Flash

Cogito v2.1 671B is not currently in the Allocate serving catalog, so this page lists no prices for it: every price on this site comes from the live catalog.

## Specifications

| | Cogito v2.1 671B | Gemini 3.5 Flash |
| --- | --- | --- |
| Lab | Deep Cogito | Google |
| Access | Not served on Allocate | API only |
| Context window | n/a | 1M tokens |
| List price, input | Not served | $1.50 / M tokens |
| List price, output | Not served | $9 / M tokens |
| Cached input | n/a | n/a |
| License | Not listed | Proprietary API |
| Fine-tunable | Yes | No |

Specifications and provider list prices from the Allocate catalog, checked 2026-09-12.

## Choose Cogito v2.1 671B for

- Long reasoning chains
- Open-weight agents
- Self-hosted reasoning

## Choose Gemini 3.5 Flash for

- High-volume support and triage
- Document extraction at scale
- Vision and OCR pipelines

## Common questions

### Which has the bigger context window?

Gemini 3.5 Flash: 1,000,000 tokens (1M) against an unlisted window for Cogito v2.1 671B.

### Can I fine-tune Cogito v2.1 671B or Gemini 3.5 Flash?

Cogito v2.1 671B publishes open weights (Not listed) and can be fine-tuned on your own data. Gemini 3.5 Flash is a closed model served over API; its weights are not available.

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[HTML page](https://allocate.network/compare/deepcogito-cogito-v2-1-671b-vs-gemini-3-5-flash) · [Cogito v2.1 671B](https://allocate.network/models/deepcogito-cogito-v2-1-671b.md) · [Gemini 3.5 Flash](https://allocate.network/models/gemini-3-5-flash.md) · [Machine-readable catalog](https://allocate.network/catalog.json)