AllocateCogito v2.1 671B vs Claude Sonnet 5
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.
C Cogito v2.1 671B
Claude Sonnet 5
Claude Sonnet 5LabDeep CogitoAnthropic
AccessNot served on AllocateAPI only
Context windown/a1M tokens
List price, inputNot served$2 / M tokens
List price, outputNot served$10 / M tokens
Cached inputn/a$0.2 / M tokens
LicenseNot listedProprietary API
Fine-tunableYesNo
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 Claude Sonnet 5 for
- Judgment calls with policy context
- Customer-facing writing
- Review and escalation flows
Common questions
Which has the bigger context window?
Claude Sonnet 5: 1,000,000 tokens (1M) against an unlisted window for Cogito v2.1 671B.
Can I fine-tune Cogito v2.1 671B or Claude Sonnet 5?
Cogito v2.1 671B publishes open weights (Not listed) and can be fine-tuned on your own data. Claude Sonnet 5 is a closed model served over API; its weights are not available.
Related comparisons
Cogito v2.1 671B vs Claude Opus 4.8Claude Sonnet 5 vs Claude Opus 4.8Cogito v2.1 671B vs GLM 5.2Claude Sonnet 5 vs GLM 5.2Cogito v2.1 671B vs DeepSeek V4 ProClaude Sonnet 5 vs DeepSeek V4 Pro
Run the numbers on your workload
Or do not choose. On Allocate a route name is the contract: point yours at one model today, swap to the other tomorrow, and compare them on your live traffic with per-token metering.